Abstract:
A valve member having a first flow path and a second flow path, and configured to control both flow paths through a filter assembly. The valve member allows control of the two flow streams in a compact space compared to traditional valves. The valve member may require less space to operate due to its compact nature as compared to traditional external valves with multiple handles that each require space to rotate. The valve member may also be used to easily shut-off flow to a filter of a filter assembly without limiting use of another filtration assembly in the same filtration system. Alternatively, the valve member may shut off flow to a corresponding filter of a stand-alone filter assembly that is not connected to another filter assembly. Also, the valve member allows less expensive and more lightweight filtration systems.

Description:
FIELD OF INVENTION 
       [0001]    The present invention relates generally to valves, and more particularly to shut-off valves that may be utilized in filtration systems having multiple filter assemblies. 
       BACKGROUND 
       [0002]    Diesel or gasoline grade fueled vehicles, such as marine vehicles with marine engines, typically receive fuel from a fuel filtration system. The fuel filtration systems often include a manifold that is fixed to the marine vehicle and used to supply clean fuel to engines. Traditionally, a filtration system separates contaminants, such as solids and water molecules, from the fuel to prevent excess engine damage and/or wear. 
         [0003]    Typically, a filtration system includes a plurality of filter units that mount to the marine vehicle and fluidly connect to at least one external valve through a manifold to control fuel flowing to or from the corresponding filter unit. Thus, shutting off flow to a single filter unit may require operation of two valves to allow maintenance of each filter unit in the filtration system or replacement of a filter of a corresponding filter unit. The external valves tend to be bulky and heavy, particularly because each filter unit requires two valves to control flow to and from each filtration unit. Also, increasing the number of filter units in a filtration system typically requires an entirely new external manifold to connect the new filter units, which may require more manufacture and assembly time, as well as additional space around each filter unit. 
       SUMMARY OF INVENTION 
       [0004]    The present invention provides a valve member configured to control two flow streams. The valve member allows control of the two flow streams in a more compact space as compared to traditional valves. The valve member may require less space to operate due to its compact nature as compared to traditional external valves with multiple handles that each requires space to rotate. The valve member may also be used to easily shut off flow to a filter of a filter assembly without limiting use of another filtration assembly in the same filtration system. Alternatively, the valve member may shut off flow to a corresponding filter of a stand-alone filter assembly that is not connected to another filter assembly. 
         [0005]    Also, the valve member allows less expensive and more lightweight filtration systems. Traditional filtration assemblies require two valves, one to control flow into a filtration assembly and one to control flow out of the filtration assembly, which increases cost and weight of the corresponding filtration system and increases potential for external leakage. 
         [0006]    A manifold module provides easy increase and decrease of the number of filter assemblies in the filtration system. The manifold module does not require a space, cost, and time consuming external manifold. Rather, the manifold module may be easily stacked adjacent another manifold module or unstacked from another manifold module to easily increase or decrease the number of filter assemblies. 
         [0007]    According to an aspect of the invention, a filter assembly comprising a manifold module having a portion of a supply line, a portion of a discharge line, and a valve passage fluidly connecting the portion of the supply line to the portion of the discharge line, and a valve member extending along a longitudinal axis and having a first inlet fluidly connected to the portion of the supply line and a first outlet, and having a second inlet fluidly connected to the portion of the discharge line and the second outlet, wherein the valve member is configured to allow a first fluid flow from the first inlet to the first outlet and from the first outlet to the filter, and allow a second fluid flow from the filter to the second inlet and from the second inlet to the second outlet when the valve member is in an open position, and wherein the first fluid flow and the second fluid flow do not inter-mix. 
         [0008]    According to another aspect, a drum shaped seal comprising a first circular portion, a second circular portion, and a plurality of axially extending portions separating the first circular portion from the second circular portion. 
     
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
         [0009]      FIG. 1  is a perspective view of an exemplary filtration system including a plurality of filter assemblies. 
           [0010]      FIG. 2  is a perspective view of the filtration system of  FIG. 1  with a portion of one of the filter assemblies cut-out. 
           [0011]      FIG. 3  is a cross-section of the filtration system of  FIG. 1 . 
           [0012]      FIG. 4  is a perspective view of an exemplary valve member for use in the filtration system of  FIG. 1 . 
           [0013]      FIG. 5  is a perspective view of an exemplary drum shaped seal for use in the filtration system of  FIG. 1 . 
           [0014]      FIG. 6  is a top view of the drum shaped seal of  FIG. 5 . 
           [0015]      FIG. 7  is a cross-section of the drum shaped seal of  FIG. 5 . 
           [0016]      FIG. 8  is an exploded view of one of the filter assemblies for use in the filtration system of  FIG. 1 . 
           [0017]      FIG. 9  is a cross-section of one of the filter assemblies for use in the filtration system of  FIG. 1  in an open position. 
           [0018]      FIG. 10  is a second cross-section from a rotated viewpoint of the filter assembly of  FIG. 9  in an open position. 
           [0019]      FIG. 11  is a cross-section of one of the filter assemblies for use in the filtration system of  FIG. 1  in a closed position. 
           [0020]      FIG. 12  is a second cross-section from a rotated viewpoint of the filter assembly of  FIG. 11  in a closed position. 
           [0021]      FIG. 13  is a cross-section of a filtration system of  FIG. 1  with a portion of one of the filter assemblies cut-out and in a partially open position. 
           [0022]      FIG. 14  is a side view of the filter assembly with the partial cut-out of  FIG. 13 . 
           [0023]      FIG. 15  is a perspective view of another exemplary drum shaped seal. 
           [0024]      FIG. 16  is a cross-section of the drum shaped seal of  FIG. 15 . 
       
    
    
     DETAILED DESCRIPTION 
       [0025]    The principles of this present application have particular application to filter assemblies for removing particulates and other contaminants from a fluid system, such as from a fuel stream in a fuel system for a marine vehicle, such as a boat, and thus will be described below chiefly in this context. It will be understood that principles of this invention may be applicable to other filter assemblies where it is desirable to remove particulates and/or water from a fluid, such as from fluid in an aircraft or other vehicle. 
         [0026]    Referring now in detail to the drawings, and initially to  FIGS. 1-3 , a filtration system  20  is illustrated. The filtration system  20  includes a plurality of filter assemblies  22  fluidly connected to one another in a stacked relationship. Each filter assembly may include a manifold module  23  having a first inlet  24 , a first outlet  26 , a valve control  28 , a second outlet  30  and a second inlet  32 , a clamp  34  for connecting an adjacent filter assembly, a coalescer  36 , a filter housing  38  and a valve  50  for controlling fluid flow from the first inlet  24 . The first inlet  24  and the second outlet  30  may form a portion of a supply line to supply unfiltered fluid to each filter assembly  22 . The second inlet  32  and the first outlet  26  may form a portion of a discharge line to discharge filtered fluid to a component, such as an engine. The valve control  28  may control fluid flow between the first inlet  24  and an interior of the filter housing, as well as fluid flow between the interior of the filter housing and the portion of the discharge line of the filter assembly  22 . 
         [0027]    The filtration system  20  may be permanently fixed to an interior of a vehicle, such as a boat. For example, the filtration system  20  may include brackets to mount the filtration system  20  to an interior wall of the boat. 
         [0028]    The stacked relationship of the filter assemblies  22  allows easily connecting or disconnecting the filter assemblies  22  to one another and allows a compact overall design. Each valve control  28  may facilitate the stacked relationship by controlling two fluid flow paths within each filter assembly  22 , one for unfiltered fluid flow and the other for filtered fluid flow. 
         [0029]    The filter assemblies  22  may be fluidly connected in series with one another by each manifold module  23  that is assembled with an adjacent manifold module in a stacked relationship. The second outlet  30  of the filter assembly  22  may be fluidly connected to an inlet of an adjacent filter assembly, and the next filter assembly may be connected similarly. The second outlet  30  and the adjacent inlet may form a supply line. For example, each filter assembly  22  is connectable to an adjacent filter assembly with an axially facing seal and/or the clamp  34 . The last filter assembly may include a plug or stop  40  (shown in  FIG. 3 ) to prevent unfiltered fluid flow through its corresponding outlet. Utilizing the same first inlet  24  and second outlet  30  for each filter assembly  22  allows modularly expanding or contracting the filtration system  20  to increase or decrease functionality of the filtration system  20 . Alternatively, the last filter assembly may not include an outlet for allowing passage of unfiltered fluid. In an embodiment, the outlet for unfiltered fluid, of the last filter assembly, acts as an inlet for providing unfiltered fluid to the filter assemblies. 
         [0030]    The second inlet  32  of the filter assembly  22  (shown in  FIG. 3 ) may be fluidly connected to an outlet of an adjacent filter assembly, and the next filter assembly may be connected similarly. The second inlet  32  and the adjacent outlet may form a discharge line. The last filter assembly may include a plug or stop  42  (shown in  FIG. 3 ) to prevent filtered fluid flow through its corresponding inlet. Utilizing the same second inlet  32  and first outlet  26  for each filter assembly  22  allows modularly expanding or contracting the filtration system  20  to increase or decrease functionality of the filtration system  20 . Alternatively, the last filter assembly may not include an inlet for allowing passage of filtered fluid. In an embodiment, the inlet for filtered fluid, of the last filter assembly, acts as an outlet for providing filtered fluid to another component, such as an engine. 
         [0031]    During use unfiltered fluid may enter through the first inlet  24  and flow through the valve  50  to each adjacent filter assembly through the corresponding inlet. When the valve  50  is in an open position, unfiltered fluid flows through the valve  50  to the coalescer  36  and to the filter housing  38 . From the filter housing  38  filtered fluid flows to the valve  50  to provide filtered fluid flow to the first outlet  26 . When the valve  50  is in a closed position, unfiltered fluid is prevented from flowing from the valve  50  to the coalescer  36  and filtered fluid is prevented from flowing from the filter housing  38  through the valve  50  to the first outlet  26 . Unfiltered fluid may continue to flow through the valve  50  to the adjacent filter assembly to allow a similar direction of flow to a corresponding coalescer and filter housing. In an alternative embodiment, when the valve is in the closed position, or a partially closed position, the valve may prevent unfiltered fluid from flowing to an adjacent filter assembly. 
         [0032]    Turning to  FIG. 4 , the valve  50  may include a valve member  70  having a flow through passage  72 , the unfiltered inlet  54 , the unfiltered outlet  56 , the filtered inlet  58 , a filtered outlet  60  (shown in  FIG. 9 ), and a drum shaped seal  52  for sealing against an inner wall  94  of the manifold module  23  (shown in  FIGS. 9  and  11 ).  FIGS. 8-14  show a configuration of the valve  50  within one of the filter assemblies  22 . 
         [0033]    Referring briefly to  FIGS. 5-7 , the drum shaped seal  52  may be disposed about the valve member to seal an unfiltered inlet  54 , an unfiltered outlet  56 , a filtered inlet  58 , and the filtered outlet  60  (shown in  FIG. 9 ). The drum shaped seal  52  may have a first circular portion  62  and a second circular portion  64  separated by a plurality of axially extending portions  66 . The axially extending portions  66  may be circumferentially spaced apart to correspond to the unfiltered outlet  56  and the filtered inlet  58 . 
         [0034]    The axially extending portions  66 , the first circular portion  62  and/or the second circular portion  64  may have a cross-section that is triangular for ease of molding of the drum shaped seal. At least one of the axially extending portions  66  may include conical protrusions  68  that extend circumferentially from the corresponding axially extending portion  66  to engage the valve member  70  upon assembly of the drum shaped seal  52  with the valve member  70 . 
         [0035]    Referring again to  FIG. 4 , the valve member  70  may be configured to receive the drum shaped seal  52 . For example, the valve member  70  may include a seal receiving cavity  110 , a seal receiving cavity  112 , and a plurality of seal receiving cavities  114 . 
         [0036]    The seal receiving cavity  110  may disposed between a flow through passage  72  and the unfiltered outlet  56 . The seal receiving cavity  110  may extend about the longitudinal axis and along a radially outwardly facing portion of the valve member  70 . The seal receiving cavity  110  may receive the first circular portion  62  of the drum shaped seal  52  to prevent fluid flow between the valve member  70  and the inner wall  94  of the manifold module  23 . 
         [0037]    The seal receiving cavity  112  may be disposed between the filtered inlet  58  and the filtered outlet  60 . The seal receiving cavity  112  may extend about the longitudinal axis and along a radially outwardly facing portion of the valve member  70 . The seal receiving cavity  112  may receive the second circular portion  112  of the drum shaped seal  52  to prevent fluid flow between the valve member  70  and the inner wall  94  of the manifold module  23 . 
         [0038]    The seal receiving cavities  114  may be disposed adjacent either side of the unfiltered outlet  56  and/or on either side of the filtered inlet  58 . The seal receiving cavities  114  may extend longitudinally and along a radially outwardly facing portion of the valve member  70  to prevent fluid leakage from or into the unfiltered outlet  56  and/or the filtered inlet  58 . For example, each seal receiving cavity  114  may be circumferentially spaced 90° from the next to form a continuous cavity around the unfiltered outlet  56  and/or the filtered inlet  58  with the seal receiving cavities  110 ,  112 . The seal receiving cavities  114  may receive the axially extending portions  66  of the drum shaped seal  52 . 
         [0039]    The flow through passage  72  may allow unfiltered fluid flow from the first inlet  24  (shown in  FIG. 8 ) to the second outlet  30  (shown in  FIG. 8 ) regardless of whether the valve  50  is in the open or closed position. The flow through passage  72  may be a foraminous section that includes a plurality of holes  74  to allow the unfiltered fluid flow. The holes  74  may be arranged in an array of longitudinally aligned rows. The aligned rows of holes  74  may be circumferentially offset from one another to allow flow from the first inlet  24  to the second outlet  30  regardless of the position of the valve  50 . The rows may be circumferentially offset by 15° about the longitudinal axis to allow continuous flow while rotating the valve  50 . Alternatively, the holes may be spaced about the longitudinal axis to prevent fluid flow from the inlet to the outlet when in at least one of the open, closed, and/or partially open positions. Preventing fluid flow from the inlet to the outlet may be desirable for the last filter assembly in a line of filter assemblies. 
         [0040]    The unfiltered inlet  54  (shown best in  FIGS. 9 and 11 ) is fluidly connected to the unfiltered outlet  56  (shown best in  FIG. 9 ). The unfiltered inlet may be disposed centrally within the valve member between the flow through passage and the unfiltered outlet. The unfiltered inlet may extend radially outward from the longitudinal axis. 
         [0041]    The unfiltered outlet  56  is disposed radially outward from the longitudinal axis. The unfiltered outlet  56  may extend along the longitudinal axis and circumferentially about the longitudinal axis. For example, the unfiltered outlet  56  may extend 90° or less. Extending less than 90° allows the unfiltered outlet  56  to be moved from a fully-aligned position with a maximum flow rate to a fully-unaligned position with a minimum flow rate through the coalescer inlet  84 . Reducing or enlarging the unfiltered outlet  56  allows a reduction or increase of unfiltered flow through the unfiltered outlet  56  when in an open or partially open position. In an embodiment, the unfiltered outlet extends less than 45° about the longitudinal axis. In another embodiment, the unfiltered outlet extends more than 90°. 
         [0042]    The filtered inlet  58  (shown best in  FIG. 9 ) is fluidly connected to the filtered outlet  60  (shown in  FIGS. 9 and 11 ). The filtered inlet  58  may be disposed radially outward from the longitudinal axis. For example, the filtered inlet  58  may be disposed opposite the unfiltered outlet  56  relative to the longitudinal axis. Preferably, the filtered inlet  58  is diametrically opposite the unfiltered outlet  56 . 
         [0043]    The filtered inlet  58  may extend along the longitudinal axis and circumferentially about the longitudinal axis. For example, the filtered inlet  58  may extend 90° or less. Extending less than 90° allows the filtered inlet  58  to be moved from a fully-aligned position with a maximum flow rate to a fully-unaligned position with a minimum flow rate through the filter outlet  90 . Reducing or enlarging the filtered inlet  58  allows a reduction or increase of filtered flow through the filtered inlet  58  when in an open or partially open position. In an alternative embodiment, the filtered inlet extends less than 45° about the longitudinal axis. In another embodiment, the filtered inlet extends more than 90° about the longitudinal axis. 
         [0044]    The filtered outlet  60  may be disposed at an end of the valve member  70  opposite the unfiltered inlet  54  relative to the unfiltered outlet  56 . The filtered outlet  60  may be separated from the unfiltered inlet  54  by a flow separation wall  192  (shown best in  FIGS. 9-14 ). Preferably, the filtered outlet  60  is symmetrical with the unfiltered inlet. For example, the filtered outlet  60  may be parallel with the unfiltered inlet  54 . The filtered outlet  60  may extend radially outward from the longitudinal axis. The diameter of the filtered outlet  60  may be equal to the diameter of the unfiltered inlet  54 . In an embodiment, the filtered outlet is smaller than the unfiltered inlet. In another embodiment, the filtered outlet is larger than the unfiltered inlet. 
         [0045]    During use, the unfiltered fluid flow and the filtered fluid flow do not inter-mix within the valve  50 . For example, unfiltered fluid flow through the flow through passage  72  to the second outlet  30  is separate from the unfiltered flow through the unfiltered inlet  54  and the filtered flow through the filtered inlet  58 . Thus, the filtered fluid flow entering the filtered inlet  58  may remain uncontaminated by the unfiltered fluid entering the unfiltered inlet  54 . In other words, the unfiltered fluid flow through the flow through passage  72  does not flow through the unfiltered inlet  54  inlet or the filtered inlet  58 . Rather, the unfiltered fluid flow through the flow through passage  72  continues to the next adjacent filter assembly. 
         [0046]    When the valve  50  is open, the fluid flow enters through a portion of the flow through passage  72 , such as the holes  74 , and a first part of the flow enters the unfiltered inlet  54  and flows out the unfiltered outlet  56 . The first part of the flow is filtered by a filter  104  (shown in  FIGS. 9 and 10 ) and is prevented from mixing with a second part of the flow between the valve member  70  and the inner wall  94  of the manifold module  23  by the drum shaped seal  52 . 
         [0047]    Turning now to  FIGS. 8-14 , one of the filter assemblies  22  is illustrated. The manifold module  23  will be described first without reference to the valve  50 . The first inlet  24  may extend along lateral axis A and may be fluidly connected to the second outlet  30  by a valve passage  62  that is fluidly connected to a coalescer inlet  84  and a filter outlet  90 . The coalescer inlet  84  and the filter outlet  90  may be fluidly connected to the second inlet  32  and first outlet  26  by a discharge inlet  92 . 
         [0048]    The first inlet  24  may include a cylindrical passage that extends along the lateral axis A partially through the manifold module  23 . The second outlet  30  may include a cylindrical passage that extends partially through the manifold module  23  coincident with the first inlet  24 . The second inlet  32  (not shown) and first outlet  26  may similarly extend through the manifold module  23  coincident to one another and parallel to the lateral axis. 
         [0049]    The valve passage  62  may extend partially through the manifold module  23  to fluidly connect the first inlet  24  to the second outlet  30  and the coalescer inlet  84  perpendicular to the lateral axis. The valve passage  62  may be cylindrical and configured to receive the valve  50 . The valve passage  62  is illustrated as being defined by a cylindrical inner wall  94  of the manifold module  23 . The cylindrical inner wall  94  may have a radius that matches an outermost portion of the valve  50  for sealing against the valve  50 . 
         [0050]    The filter assembly  22  may include a seal  86 , such as an o-ring, disposed between the valve control  28  and the valve member  70  to prevent leakage out of the valve passage  62 . 
         [0051]    The filter assembly  22  may include a retaining ring  88  disposed opposite the o-ring  86  relative to the valve control  28  to prevent axial movement of the valve  50  out of the valve passage  62 . 
         [0052]    The coalescer inlet  84  and the filter outlet  90  are offset from one another about a longitudinal axis B (see  FIG. 9 ) that is perpendicular to the lateral axis A. Offsetting the coalescer inlet  84  and the filter outlet  90  allows the valve member  70  to seal against the cylindrical inner wall  94  between the coalescer inlet  84  and the filter outlet  90 . The coalescer inlet  84  and the filter outlet  90  may be diametrically opposite each other relative to the longitudinal axis. 
         [0053]    Both the coalescer inlet  84  and the filter outlet  90  are longitudinally spaced from each end of the valve passage  62  to allow the valve  50  to seal against the inner wall  94  of each longitudinal side of the coalescer inlet  84  and the filter outlet  90 . For example, the longitudinal spacing of the coalescer inlet  84  may provide a portion of the inner wall  94  on either longitudinal side of the coalescer inlet  84  to allow the valve  50  to seal against each portion of the inner wall  94  around an opening of the coalescer inlet  84 . The longitudinal spacing of the filter outlet  90  provides a portion of the inner wall  94  on either side of the filter outlet  90  to allow the valve  50  to seal around an opening of the filter outlet  90 . 
         [0054]    The coalescer inlet  84  and the filter outlet  90  are illustrated as concentric with a vertical axis C (see  FIG. 9 ) that is perpendicular to the lateral axis A and the longitudinal axis B. In an embodiment, the coalescer inlet and the filter outlet may be longitudinally offset from one another. In another embodiment, the coalescer inlet may have a diameter different from a diameter of the filter outlet. 
         [0055]    The discharge inlet  92  may include an axially extending cylindrical inner wall  96  that extends partially about the longitudinal axis. The discharge inlet  92  may include a radially inwardly extending tab  98  for limiting rotation of the valve  50 . The radially inwardly extending tab may have a stop surface at each circumferentially spaced apart end of the extending tab  98 . In an embodiment, the radially inwardly extending tab may be a plurality of tabs to restrict rotation of the valve. 
         [0056]    When the valve is in an open position unfiltered fluid flows into the valve  50  and to the coalescer  36  where coalesced water may be removed from the unfiltered fluid. The unfiltered fluid may be directed in a spiral path by a turbine  100  to facilitate water removal. 
         [0057]    From the coalescer  36 , the unfiltered fluid is directed through a filter passage  102  to the filter  104 . The unfiltered fluid may flow up to the filter  104  from the coalescer  36 . In an embodiment, a coalescer is not utilized and the unfiltered fluid is directed to a filter. 
         [0058]    The filter  104  filters the unfiltered fluid and directs filtered fluid to the filter outlet  90 . The filtered fluid flows from the filter outlet  90  to the valve member  70  and to the discharge inlet  92 . Once the filtered fluid reaches the discharge inlet  92 , the filtered fluid may flow out the first outlet  26  for use by a vehicle component, such as an engine. 
         [0059]    The valve  50  controls unfiltered fluid flow from the first inlet  24  to the coalescer  36  and controls flow from the filter  104  to the first outlet  26 . 
         [0060]    The valve member  70  may be configured to allow unfiltered flow from the unfiltered inlet  54  to the unfiltered outlet  56 , and allow filtered fluid flow from the filtered inlet  58  to the filtered outlet  60 , when the valve member  70  is in an open position. The valve member  70  extends along the longitudinal axis B. The valve member  70  may extend a length greater than the cylindrical inner wall  94 . The valve member  70  may be generally cylindrical to allow rotational movement within the valve passage  62 . A first end  142  of the valve member  70  is inserted first into the valve passage  62 . The valve member  70  may have an axially extending stop tab  144  for engaging the radially inwardly extending tab  98  of the manifold module  23 . The stop tab  144  may extend circumferentially about the longitudinal axis to allow 90° of rotational movement of the valve member  70  during use. 
         [0061]    For example, the stop tab  144  may extend 180° about the longitudinal axis and the radially inwardly extending tab  98  may extend 90° about the longitudinal axis. Thus, a first end of the stop tab  144  may engage a first end of the radially inwardly extending tab  98  (shown in  FIGS. 9 ,  11 ,  13 , and  14 ) in the open position, and a second end of the stop tab  144  may engage a second end of the radially inwardly extending tab  98  (shown in  FIGS. 9 ,  11 ,  13 , and  14 ) in the closed position. Also, the stop tab  144  may prevent full axial insertion of the valve member  70  until the valve member  70  is oriented properly in the open, closed, and/or partially open position. 
         [0062]    During insertion a second end  146  of the valve member  70  may follow the first end  142  into the valve passage  62 . A radially outermost portion of the second end  146  may extend radially outward past the cylindrical inner wall  94  to prevent further axial movement of the valve member  70  into the valve passage  62 . Preventing further axial movement allows proper axial alignment of the valve member  70  in the manifold module  23 . 
         [0063]    The valve control  28  may be configured to rotate the valve member to allow opening or closing of the valve  50 . For example the valve control  28  may be configured to rotate the valve member 90°, from the open position to the closed position. The valve member  70  may have a plurality of tabs  148  for engaging the valve control  28  (shown in  FIGS. 8 ,  9 , and  11 ) at the second end  146 . For example, the valve control  28  may be a knob with a plurality of notches  150 . The tabs  148  may extend radially inwardly to engage corresponding notches  150  in the valve control  28 . Each tab  148  may be spaced 90° from the next tab about the longitudinal axis. In an alternative embodiment, only a single tab is provided. In another embodiment, the valve control includes a tab to engage a notch in the valve member. In yet another embodiment, the valve control is attached to the valve member in any other suitable manner, such as adhesive, injection molding, or press fitting. 
         [0064]    Referring to  FIGS. 9 and 10 , the valve member  70  may include the flow separation wall  192  to fluidly separate the unfiltered fluid flow from the filtered fluid flow. The flow separation wall  192  may extend from a first interior portion of the valve member  70  that is adjacent to the unfiltered inlet  54  and the filtered inlet  58  to a second interior portion of the valve member that is adjacent to the unfiltered outlet  56  and the filtered outlet  60 . For example, the flow separation wall  192  may extend at a 45° relative to the vertical axis C. The flow separation wall  192  may also extend parallel with the lateral axis A from a side wall  194  of the valve member  70  to a side wall  196  of the valve member  70 . 
         [0065]    Each side wall  194 ,  196  may extend between the unfiltered outlet  56  and the filtered inlet  58 . The side walls  194 ,  196  may be opposite one another relative the longitudinal axis. For example, the side walls  194 ,  196  may be diametrically opposed to one another. In the closed position (shown in  FIGS. 11 and 12 ) fluid is blocked from flowing through the unfiltered outlet  56 , and fluid is blocked from flowing through the filtered outlet  60 . 
         [0066]    The second part of the flow exits the filter  104 , enters the filtered inlet  58  and flows out of the filtered outlet  60 . The second part of the flow may have a flow rate substantially identical to the flow rate of the first part of the flow. For example, the first part of the flow may pass through the coalescer  36  and the filter  104  where the second part of the flow begins. The flow rate of the second part may be slightly less than the first part of the flow because coalesced water will be removed and particles will be filtered from the first part of the flow. 
         [0067]    A third part of the fluid flow may flow into and out of the flow through passage  72 . The third part may continue to the next adjacent filter assembly to be filtered. The third part may have a flow rate different from the first part and the second part. For example, the third part may provide flow for more than two downstream filter assemblies. Preferably, the flow rate of the third part will be at least twice the flow rate of the first and second parts to accommodate the at least two downstream filter assemblies. The third part of the flow is prevented from mixing with the first and second parts between the valve member  70  and the inner wall  94  by the drum shaped seal  52 . In an alternative embodiment, the third part of the flow is not provided and all flow into the flow through passage is first part of the flow. 
         [0068]    When the valve  50  is in a closed position, the unfiltered fluid flows through the flow through passage  72 , and fluid does not flow through the unfiltered inlet  54  or the filtered inlet  58 . Fluid pressure driving the first part of the flow through the coalescer  36  and the filter  104  reduces to zero by fluidly disconnecting the coalescer inlet  84  from the filtered first inlet  24 . At the same time, the filter outlet  90  may be fluidly disconnected from the filtered first outlet  26  and the filtered second inlet  32  to allow removal of the filter  104  without leakage due to back flow from the filtered second inlet  32 . 
         [0069]    Turning now to  FIGS. 15 and 16 , an exemplary embodiment of the drum shaped seal is shown at  332 . The drum shaped seal  332  is substantially the same as the above-referenced drum shaped seal  52 , and consequently the same reference numerals but indexed by  200  are used to denote structures corresponding to similar structures in the drum shaped seal. In addition, the foregoing description of the drum shaped seal  52  is equally applicable to the drum shaped seal  332  except as noted below. Moreover, it will be appreciated upon reading and understanding the specification that aspects of the drum shaped seals may be substituted for one another or used in conjunction with one another where applicable. 
         [0070]    The axially extending portions  265 , the first circular portion  262  and/or the second circular portion  264  may have a cross-section that is circular for easier rotation of the corresponding valve  250 . 
         [0071]    According to one aspect of the invention, a filter assembly comprising a manifold module having a portion of a supply line, a portion of a discharge line, and a valve passage fluidly connecting the portion of the supply line to the portion of the discharge line, and a valve member extending along a longitudinal axis and having a first inlet fluidly connected to the portion of the supply line and a first outlet, and having a second inlet fluidly connected to the portion of the discharge line and the second outlet, wherein the valve member is configured to allow a first fluid flow from the first inlet to the first outlet and from the first outlet to the filter, and allow a second fluid flow from the filter to the second inlet and from the second inlet to the second outlet when the valve member is in an open position, and wherein the first fluid flow and the second fluid flow do not inter-mix. 
         [0072]    The filter assembly may further comprise a filter within a filter housing of the filter assembly, the filter being fluidly connected to the valve member. 
         [0073]    The filter may include filter media to filter the first fluid flow. 
         [0074]    The portion of the supply line may extend parallel to the portion of the discharge line. 
         [0075]    The portion of the supply line may be fluidly disconnected from the filter, and the portion of the discharge line may be fluidly disconnected from the filter when the valve member is in a closed position. 
         [0076]    The valve member may further include a flow through passage configured to allow fluid flow through the valve member and the portion of the supply line. 
         [0077]    The fluid flow through the flow through passage may be separate from the first and second fluid flows. 
         [0078]    The fluid flow through the flow through passage may not flow through the first inlet or the second inlet. 
         [0079]    Fluid flow may enter through a portion of the flow through passage, a first part of the flow may enter the first inlet and flow out the first outlet, a second part of the flow may enter the second inlet and flow out of the second outlet and a third part of the flow may flow out of the flow through passage. 
         [0080]    When the valve is in a closed position, fluid may flow through the flow through passage to flow through the portion of the discharge line, and fluid may not flow through the first inlet or the second inlet to reach the portion of the discharge line. 
         [0081]    The valve member may be tubular. 
         [0082]    The first inlet may be disposed centrally within the valve member between the flow through passage and the first outlet. 
         [0083]    The first inlet may extend radially outward from the longitudinal axis. 
         [0084]    The valve member may further include a flow separation wall to fluidly separate the first fluid flow from the second fluid flow. 
         [0085]    The flow separation wall may extend from a first interior portion of the valve member that is adjacent to the first inlet and the second inlet to a second interior portion of the valve member that is adjacent to the first outlet and the second outlet. 
         [0086]    The first outlet may be disposed radially outward from the longitudinal axis. 
         [0087]    The second inlet may be disposed radially outward from the longitudinal axis. 
         [0088]    The second inlet may be disposed opposite the first outlet relative to the longitudinal axis. 
         [0089]    The second inlet may be diametrically opposite the first outlet. 
         [0090]    The second outlet may be disposed at an end of the valve member opposite the first inlet relative to the first outlet. 
         [0091]    The second outlet may extend radially outward from the longitudinal axis. 
         [0092]    In closed position, fluid may be blocked from flowing through the first outlet, and fluid may be blocked from flowing through the second outlet. 
         [0093]    The filter assembly may further include a valve control configured to rotate the valve member. 
         [0094]    The filter assembly may further include a drum shaped seal disposed about the valve member to seal the inlets and the outlets. 
         [0095]    The drum shaped seal may have a first circular portion and a second circular portion separated by a plurality of axially extending portions. 
         [0096]    The axially extending portions may be circumferentially spaced apart to correspond to the first outlet and the second inlet. 
         [0097]    A cross-section of axially extending portions, the first circular portion and/or the second circular portion may be triangular. 
         [0098]    A cross-section of axially extending portions, the first circular portion and/or the second circular portion may be circular. 
         [0099]    The valve member may further include seal receiving cavities surrounding adjacent a perimeter of each of the first outlet and the second inlet. 
         [0100]    A filtration system may comprise the filter assembly, and a connecting element for fluidly connecting the portion of the supply line of the filter assembly to a second portion of the supply line. 
         [0101]    The filtration system may comprise a plurality of filter assemblies in a stacked relationship. 
         [0102]    A method of shutting off flow to a filter and from a filter comprising providing the filter assembly, and rotating the valve member of the filter assembly from the open position to a closed position. 
         [0103]    A method of removing a filter comprising rotating the valve member of the filter assembly from the open position to a closed position to shut off flow to the filter, and disconnecting the filter from the manifold module. 
         [0104]    According to another aspect, a filtration system comprising a plurality of filter assemblies stacked together and fluidly connected in series with one another by a supply line and a discharge line, each filter assembly including a manifold module having a portion of the supply line for unfiltered fluid and a portion of the discharge line for filtered fluid, wherein the supply line is formed by each portion of the supply line and the discharge line is formed by each portion of the discharge line, and wherein the portion of the supply line of the manifold module of a first filter assembly of the filter assemblies fluidly connects to the portion of the supply line of the manifold module of a second filter assembly of the filter assemblies, and the portion of the discharge line of the manifold first filter assembly fluidly connects to the portion of the discharge line of the manifold of the second filter assembly, thereby allowing unfiltered fluid to enter the portion of the supply line of the first filter assembly to reach the second filter assembly and allowing filtered fluid to flow between each portion of the discharge line. 
         [0105]    The supply line may fluidly connect to the portion of the supply line of a third filter assembly of the filter assemblies, and the discharge line may fluidly connect to the portion of the supply line of the third filter assembly, thereby allowing unfiltered fluid to enter the portion of the supply line of the first filter assembly to reach the third filter assembly and allowing filtered fluid to flow between each portion of the discharge line. 
         [0106]    Each filter assembly may be connectable to an adjacent filter assembly with an axially facing seal and/or a clamp. 
         [0107]    According to another aspect, a valve comprising a tubular valve member extending along a longitudinal axis and having a first inlet fluidly connected to a first outlet, and having a second inlet fluidly connected to a second outlet, wherein the valve member is configured to allow a first fluid flow from the first inlet to the first outlet and allow a second fluid flow from the second inlet to the second outlet when the valve member is in an open position, and wherein the first fluid flow and the second fluid flow do not inter-mix. 
         [0108]    The valve member may further include a flow through passage configured to allow fluid flow through the valve member. 
         [0109]    The fluid flow through the flow through passage may be separate from the first and second fluid flows. 
         [0110]    The fluid flow through the flow through passage may not flow through the first inlet or the second inlet. 
         [0111]    Fluid flow may enter through a portion of the flow through passage, a first part of the flow may enter the first inlet and flow out the first outlet, a second part of the flow may enter the second inlet and flow out of the second outlet and a third part of the flow may flow out of the flow through passage. 
         [0112]    When the valve is in a closed position, fluid may flow through the flow through passage, and fluid may not flow through the first inlet or the second inlet. 
         [0113]    The valve member may be cylindrical. 
         [0114]    The first inlet may be disposed centrally within the valve member between the flow through passage and the first outlet. 
         [0115]    The first inlet may extend radially outward from the longitudinal axis. 
         [0116]    The valve member may further include a flow separation wall to fluidly separate the first fluid flow from the second fluid flow. 
         [0117]    The flow separation wall may extend from a first interior portion of the valve member that is adjacent to the first inlet and the second inlet to a second interior portion of the valve member that may be adjacent to the first outlet and the second outlet. 
         [0118]    The first outlet may be disposed radially outward from the longitudinal axis. 
         [0119]    The second inlet may be disposed radially outward from the longitudinal axis. 
         [0120]    The second inlet may be disposed opposite the first outlet relative to the longitudinal axis. 
         [0121]    The second inlet may be diametrically opposite the first outlet. 
         [0122]    The second outlet may be disposed at an end of the valve member opposite the first inlet relative to the first outlet. 
         [0123]    The second outlet may extend radially outward from the longitudinal axis. 
         [0124]    In closed position, fluid may be blocked from flowing through the first outlet, and fluid may be blocked from flowing through the second outlet. 
         [0125]    The valve may further include a valve control configured to rotate the valve member. 
         [0126]    The valve may further include a drum shaped seal disposed about the valve member to seal the inlets and the outlets. 
         [0127]    The drum shaped seal may have a first circular portion and a second circular portion separated by a plurality of axially extending portions. 
         [0128]    The axially extending portions may be circumferentially spaced apart to correspond to the first outlet and the second inlet. 
         [0129]    A cross-section of axially extending portions, the first circular portion and/or the second circular portion may be triangular. 
         [0130]    A cross-section of axially extending portions, the first circular portion and/or the second circular portion may be circular. 
         [0131]    The valve may further include seal receiving cavities surrounding adjacent a perimeter of each of the first outlet and the second inlet. 
         [0132]    A filtration system may include the valve. 
         [0133]    The filtration system may include a plurality of filter assemblies, at least one of the filter assemblies may include the valve. 
         [0134]    A method of shutting off flow to a filter and from a filter comprising providing the valve, and rotating the valve member of the valve from the open position to a closed position. 
         [0135]    A method of removing a filter comprising rotating the valve member of the valve from the open position to a closed position to shut off flow to the filter, and disconnecting the filter from a manifold module fluidly connected to the valve. 
         [0136]    According to another aspect, a drum shaped seal comprising a first circular portion, a second circular portion, and a plurality of axially extending portions separating the first circular portion from the second circular portion. 
         [0137]    According to another aspect, a valve comprising a valve member extending along a longitudinal axis and having a first inlet fluidly connected to a first outlet, and having a second inlet fluidly connected to a second outlet, and the drum shaped seal disposed about the valve member to seal the inlets and the outlets, wherein the valve member is configured to allow a first fluid flow from the first inlet to the first outlet and allow a second fluid flow from the second inlet to the second outlet when the valve member is in an open position, and wherein the first fluid flow and the second fluid flow do not inter-mix. 
         [0138]    Although the invention has been shown and described with respect to a certain embodiment or embodiments, it is obvious that equivalent alterations and modifications will occur to others skilled in the art upon the reading and understanding of this specification and the annexed drawings. In particular regard to the various functions performed by the above described elements (components, assemblies, devices, compositions, etc.), the terms (including a reference to a “means”) used to describe such elements are intended to correspond, unless otherwise indicated, to any element which performs the specified function of the described element (i.e., that is functionally equivalent), even though not structurally equivalent to the disclosed structure which performs the function in the herein illustrated exemplary embodiment or embodiments of the invention. In addition, while a particular feature of the invention may have been described above with respect to only one or more of several illustrated embodiments, such feature may be combined with one or more other features of the other embodiments, as may be desired and advantageous for any given or particular application.