Abstract:
A device for coordination of installation components of a heating or cooling system. The device includes a number of distributors ( 3 ) with functional components ( 5 ). The distributors are mounted in a profile ( 4 ), which is fixed in a complete installation unit ( 1 ). The profile ( 4 ) provides the distributors with a rotational mounting position and facilitates subsequent servicing of the installation components or installation of additional distributors to supplement the installation unit.

Description:
[0001]    This application is a National Stage completion of PCT/SE2007/000550 filed Jun. 8, 2007, which claims priority from Swedish patent application serial no. 0602072-1 filed Oct. 4, 2006. 
     
    
     FIELD OF THE INVENTION 
       [0002]    The present invention relates to an installation unit in an energy distribution system—for a heating or cooling system—a number of functions or products having been integrated into an installation and service unit, which allows completely new conditions for the installation work as well as for the maintenance jobs in the system. 
       BACKGROUND OF THE INVENTION 
       [0003]    In the installations, which exist today, for a heating or cooling system, a number of components or functions are integrated, which jointly provide a system for distributing the energy distribution out to the various apparatuses or premises, which exist in the particular case. 
         [0004]    In these systems there is e.g. an integration of components for controlling the temperature regulating valves and/or thermostat valves—often provided with some type of adjustment devices—as well as a number of additional functions, e.g. connection points for filling or discharge of the system, for flushing, for dirt collection, for a deaeration device, for flow regulation, for various types of reading of e.g. volume flow or energy as well as various types of supervision. These various functions and components respectively often are mounted adjacent or directly connected to the heating or cooling assemblies; i.e. valves etc. are often mounted directly connected to a radiator or a cooling battery, a connector, namely out in the various rooms/premises. 
         [0005]    In modern systems some of the above-mentioned functions are used, but the installation engineering or rather the systems available for the construction of the complete distribution system has a few drawbacks, which the present invention seeks to eliminate. 
         [0006]    The worst drawback of the modern systems is the fact, that they have been developed from simple systems, in which a smaller number of components or functions were jointly integrated. 
         [0007]    However, in modern complicated systems, not only regarding the energy components but regarding the entire construction process, there has been a continued modifications of the systems already constructed, an optimization of the costs for the various integrated components often being done, without considering the entirety of the whole system, the entirety today being influenced by many different jointly responsible participants. 
         [0008]    With regard to the modern systems, there is often a conflict between various participants in connection with the construction process. The various working moments will, using the modern systems, be completely dependent on each other. Also, in other phases of the installation process often different interests collide. 
         [0009]    As an example it can be stated, that adjustment of an energy distribution system often is done, when the already are being used and when the particular premises are not available in the same way as in an earlier phase of the construction process. Also, in other situations considerable problems regarding the accessibility arise, when a construction must be adjusted or some components must be exchanged or the like. 
         [0010]    The energy distribution systems have so far been constructed with a suboptimization as an initial position. This suboptimization means, that the systems will comprise a number of components, which per se, considered separately, are cost efficient, but that the total cost of the system “in situ” or for its maintenance has not been considered thoroughly, when the constructions have been developed. 
         [0011]    Not only the cost of the installation but much more the cost and the functionality during the technical life of the system consequently is the basic theory behind the present invention. Thanks to the present invention entirely new conditions have been obtained for the manufacture, the installation and the maintenance of an energy distribution system, which conditions allow completely new possibilities during the various phases of the construction and the useful life of a building. 
     
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
         [0012]    These thoughts and this object are realized according to the present invention by carrying out the construction according to what has been stated in the introduction. Additional characterizing features of and advantages of the invention are set forth in the following description, reference being made to the enclosed drawings, which show a preferred but non-limiting embodiment of the invention. In detail, in diametrical, partially schematic sections or in perspective views: 
           [0013]      FIG. 1  shows a general view of an embodiment of a complete installation unit; 
           [0014]      FIG. 2  a general view of an installation unit without a cabinet; 
           [0015]      FIG. 3A  a distributor in a mounting position; 
           [0016]      FIG. 3B  a distributor in another mounting position: 
           [0017]      FIG. 3C  a distributor in yet another mounting position: 
           [0018]      FIG. 3D  a distributor connection in cross section: 
           [0019]      FIG. 3E  a distributor in a further mounting position: 
           [0020]      FIG. 3F  a distributor in another mounting position: 
           [0021]      FIG. 3G  a distributor connection along section line A-A in  FIG. 3F : 
           [0022]      FIG. 4  the principle of interconnecting a functional component; 
           [0023]      FIG. 4A  a cross section of the principle of interconnecting a functional component; 
           [0024]      FIG. 5  a distributor, mounted in a holding profile; 
           [0025]      FIG. 6  a functional component; and 
           [0026]      FIG. 7  a distributor with mounted functional components. 
       
    
    
     DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS 
       [0027]      FIG. 1  shows an example of how a complete installation unit  1  according to the present invention is constructed; and  FIG. 2  shows an embodiment of an installation unit without a cabinet  7 . 
         [0028]    These figures show a design, which only is one example of how integrated component parts are assembled. Thus, within the scope of the inventive idea, a complete installation unit  1  may be provided with additional components, which may be directly or indirectly mounted on distributors  3  or alternatively constitute e.g. complementary parts to the functional component. Functional component  5  may e.g. represent electrical adjustment means, instead of the manual ones, shown in the figures, as well as mounted transmitters for remote reading and remote control respectively of the mounted valves: Also, as examples pressure and temperature transmitters may be mounted in the various measuring nipples  12 ,  13 ,  17  and  67 , which consequently allow a direct or indirect reading. 
         [0029]    According to a preferred embodiment of the invention the various components are mounted in a cabinet to obtain a complete installation unit  1 , which results in, that the installation—the installation work as well as the component placements—will be completely changed compared to the installation principles used today, resulting in the advantages, which the present invention allows. 
         [0030]    The primary piping system is connected to the unit—intake  8  and return  9  respectively—connection tubes at  8  and  9  respectively comprising connection ends  10 , which optionally are threaded, provided with flanges or are flat, as is shown in  FIG. 1 . 
         [0031]    At connection  8 —on the intake side of the unit—a balancing valve  11 , with its measuring nipples  12  and  13  respectively, is mounted as a first component. 
         [0032]    Balancing valve  11  advantageously has an internal thread at its two ends. The balancing valve  11  is connected to a distributor  3  by means of a connection piece  14 . 
         [0033]    The connection piece has an external thread, directed towards balancing valve  11 , and a bayonet connection at the end, which is connected to distributor  3 . 
         [0034]    The construction of the bayonet connection is shown in  FIGS. 3A-3G . Also, the separate distributors  3  are connected in an axial direction using the same principle and normally 2-4 distributors are connected in series. The last distributor is normally terminated with a connection piece  15 , which is terminated with a plug  18 , which also is mounted via a bayonet holder in connection piece  15 . 
         [0035]    At connection  9 —on the return side of complete installation unit  1 —a differential pressure valve  16  with its measuring nipple  17  is mounted as the last component. 
         [0036]    Differential pressure valve  16  preferably is threaded in its interior at its two ends and is connected to distributor  3  by means of a connection piece  14  in the same way as balancing valve  11 . As the last component on return side  9  there is a connection piece  15 , which advantageously may be similar to the one, which is mounted on the intake side. As an alternative to plug  18  this connection piece may be provided with a coupling  19 , in which in a particular case e.g. a discharge or a deaeration function is mounted. 
         [0037]    Distributors  3  and connection pieces  14 ,  15  are mounted in a profile  4 , which is described in more detail below. 
         [0038]    In order to be able to always carry out a simple installation or service of the complete system complete installation unit  1  is constructed in such a way, that complete cabinet  7  comprises a number of sides/parts, which, when assembled, constitute the complete cabinet. The complete cabinet preferably is made of a sheet metal material or alternatively a suitable plastic material. 
         [0039]    In order to carry out the installation work in a simple fashion and with a satisfactory accessibility to all the components cabinet  7  will comprise a back plate  20  and a bottom plate  21 , which advantageously are bent in one piece. On this work piece— 20 / 21 —profile  4  is fastened by means of screws or the like. Subsequently the valves, distributors, functional components and connection pieces, which will be used in the particular construction, will be mounted. 
         [0040]    When the pipe work/installation has been completed, lateral pieces  22  and  23  and lid  24  respectively will be mounted. Lateral piece  23  preferably is slit, allowing it to be pushed inwards above connections  8  and  9 , whereas lid  24  preferably consists of two portions in order to also allow a dismounting, after the connection of tubes  25  to the interacting tubes from e.g. radiators or convectors, which complete installation unit  1  interacts with. As the last step lid  24  is screwed or in another way fastened to sides  22  and  23  and the sides of bottom plate  21  respectively. 
         [0041]    The distribution of the total flow outwards to the various consumption units, e.g. convectors, is done via stop valves  29 , mounted in cut-offs  30  on distributors  3 . Stop valve  29  has a pipe coupling  31 , to which a tubular loop  32  is connected and the return from this tubular loop  33  is connected to return connection  34  by means of its pipe coupling  35  to functional component  5 . 
         [0042]    The entire installation unit  1  is mounted and function tested, e.g. tested regarding pressure, in a factory, which allows a high degree of functional reliability. 
         [0043]    A possible leakage in installation unit  1  can be easily indicated, since the unit is mounted in a cabinet  11 , and this means, that the risk of water damage to the building is minimized. 
         [0044]    The integration of several functions in an installation unit  1  according to the present invention results in several advantages. 
         [0045]    Thus, several functions have been assembled in just one place and consequently been removed from earlier locations, in which they have been scattered and e.g. mounted in various places and often connected to other components in the system. Thanks to the present invention a heating and cooling plant can be constructed in such a way, that the installation contractor mounts e.g. radiators in the building at one moment and in a later stage interconnects the same to obtain installation unit  1 . Also, the contractor can make his tubing from the heating or cooling assemblies up to the installation unit  1  at the same occasion and at a later occasion make the final interconnections of the various heating and cooling assemblies to the primary energy source or to tubing system originating from the same. It is also possible to connect e.g. one portion of the building to the complete heating or cooling system without the need at this time to connect all other portions of the building. This means, that installation unit  1  in a first phase comprises several distributors  3 , one or several of them being provided with plugs in connections  30 . In a second installation step additional functional components  5  can be interconnected, if they are required. Even if from a structural engineering point of view it would not be advantageous to mount the installation unit in a cabinet  7 , this design is nevertheless an embodiment of how the present invention can be used—see  FIG. 2 . 
         [0046]    The installation unit replaces the demand for externally, e.g. in each premise, mounted valves, designed to control the flow and then also the room temperature. By using functional components  5  and stop valves  29  and additional components, e.g. filters and stop valves, which may be specific for the installation, has in this way all the installation and preliminary adjustment work regarding the components, which normally constitute parts of normal cooling and heating installations, i.e. primarily flow regulating valves, stop valves, discharge valves and filters, been removed from the various premises, and instead been united in just one place, the installation unit. 
         [0047]    The installation unit can be mounted in an optional place, e.g. in a passage or in an appliance room. The separate locations, with their convectors or heating elements, which are connected to the unit, consequently will be freed from all kinds of installation work, as soon as the intake and return ducts have been mounted between the devices and the installation unit. The interconnection of the ducts with the installation unit can be done in a later phase. This means, that the various premises do not have to be accessible in a later phase, when e.g. the final adjustment work will be done or a change will take place regarding the choice of components or the service of the components. This is a great advantage in comparison with the presently used systems, in which this accessibility always is a requirement. 
         [0048]    By using installation unit  1  according to the present invention a concentrated localization of the functional components can be attained and then also a number of advantages, as follows:
       Installation unit  1  allows an accessibility to this unit and consequently also to the interconnected components.   All the service work can be carried out in just on place.   The interconnection of installation unit  1  to primary piping system  6  can be done at one specific time and not necessarily connected at the time, when the separate premises are prepared or are interconnected to the distribution unit.   The interconnection and the connection of the separate rooms/premises can be done successively to the installation unit.   Installation unit  1  can be developed with additional distributors  3 , in case e.g. new premises or other room divisions must be connected in a later phase, without affecting already connected premises.   Supplementary uses of/exchanges of functional components can be done in a later phase.   Measurement and supervision of the energy status of the various premises can be done through the installation unit.   Using a complete installation unit  1  reduces the risk of water damage in the building.   By using an installation unit, which is prefabricated, a controlled, functionally reliable product is obtained.       
 
         [0058]    The various portions of installation unit  1  are described in detail in the following figures. 
         [0059]      FIG. 2  shows installation unit  2 , which comprises all the tubular and functional components, which are integral parts of complete installation unit  1 , including profile  4 , without a surrounding cabinet  7 , and in a view, seen from the rear portion of the installation unit in relation to intake  8  and valve  9 . As the last component connection piece  15  is mounted. In order to obtain an axial mounting position for the connection piece and consequently also other parts, connected in series, connection piece  15  is provided with a flange  26 . This flange has a diameter, which is proportional to profile  4  in such a way, that flange  26  bears against end gable  27  of the profile. With this fixed position of the connection piece and of the distributors certain positions for all the tube cut-offs are obtained, which originate from the distributors and consequently the position for the tubes  32  and  33  in relation to profile  4  is given. There is no absolute retention of connection piece  15  or distributors  3  in the opposite axial direction, but lid  24  and its pipe passthroughs  28  constitute there a support like the final connection of inlet  8  and return  9 . 
         [0060]      FIGS. 3A-3G  shows the principal construction of distributor  3 . 
         [0061]    Normally the distributors are made with 2 pieces of cut-offs  30 , but the number of the cut-offs varies preferably between 1 and 4 pieces. In these cut-offs functional components  5  are mounted, which may have a number of different functions or combinations of functions. In the description—see  FIGS. 4 ,  4 A—a preferred design of the interconnection of the functional component and the distributors has been described, but this design is just one example within the scope of the invention. The design of the connections ends of the distributors is shown in  FIGS. 3A ,  3 C,  3 D,  3 E. 
         [0062]    These figures shows, that the distributor has a female part  36  and a male part  37 . These two parts are joined and then O-ring  38  in the female part will glide upwards on cylindrical part  39  of the male part. The female part has an inner diameter  41  with an O-ring groove  40  and a short cylindrical part  42  outside the O-ring groove, with the same diameter as  41 . The female part is terminated with two shoulders  44 , positioned in a diametrical direction in relation to each other and which each extend preferably somewhat less than 90° around the periphery of the female part. The shoulders have an inner diameter, which is somewhat larger—preferably 1-4 mm—than inner diameter  41  of the female part and an axial extension, which preferably is 2-4 mm. 
         [0063]    Male part  37  is designed in such a way, that outer diameter  39  with its front oblique surface  45  cooperates with inner diameter  41  of the female part and with O-ring  38  and at the same time as male part  37  has two cylindrical portions  46 , which after the interconnection of the distributors engage groove  43  of the female part and consequently lock the distributors in an axial direction. Cylindrical portions  46  are located at the same distance from flange  47  of the distributor, which constitutes the end of the male part inwards towards the distributor, like the thickness of shoulders  44 , and has a thickness, which is adjusted to and which cooperates with groove  43  and its width. In a radial direction the length of cylindrical portions  46  are coordinated to enable them to be inserted between the two shoulders  44  of female part  36  and the distance, which exists between these shoulders. 
         [0064]      FIGS. 3B ,  3 F,  3 G show, how distributors  3  are interconnected. In the upper figure the male and the female parts have been pushed into each other, cylindrical part  39  of the male part being integrated with O-ring  38  of the female part and with inner diameter  41  of the female part. However, in the upper figure the right distributor has not been turned yet in relation to the connection of the interconnecting distributor, which means, that in this position shoulders  44  of the female part have not engaged the projecting cylindrical portions  46  of the male part.  FIG. 3F  the right distributor has been turned 90°. In this position the cooperating connection ends—the male and the female parts—have occupied their final positions and this means, that the two distributors are mutually locked in an axial direction. In this position all cut-offs  30  are parallel and directed in the same direction. In connection with the subsequent mounting of the distributors in profile  4  also their mutual position in a rotational direction will be locked. The locking is done, because locks  65 , which are located on the periphery of the distributor and which are located with a 90° division and where a spring extends through the center for cut-offs  30  and the rest thus with a 90° displacement to this plane, engage with corresponding groove  64  in profile  4 . The length, height and width of the springs have been evaluated. The length is practically about the same as the distributor excluding its connection ends, whereas the width or thickness is about 2-6 mm and the height preferably is about 5-30 mm. The springs preferably are provided with recesses  77 , which make them less expensive to manufacture and which of course can vary as to shape and number within the scope of the invention. The distributor can of course be designed with only 2 or 3 springs, but 4 springs result in casting technology advantages, since a more even material distribution in the blank to the distributor is obtained. Consequently shrinkages during casting can be avoided. The mounting of the distributor in the profile is described thoroughly, reference being made to  FIG. 5 . 
         [0065]      FIGS. 4 ,  4 A show, how the various functional components  5  are mounted on distributor  3 . Cut-offs  30  of the distributors are designed in such a way, that a functional component  5  and its connection end  55  can be pushed into cut-off  30  and be fixed by means of a locking ring  48 . In more detail cut-off  30  is designed with a turned interior surface  49 , which cooperates with a guide pin  50  on connection end  55 , the guide pin having a diameter, which cooperates with surface  49  in order to give the functional component a guided, stabilized fastening in distributor  3 . Outside surface  49 —at a larger distance from the center of the distributor—there is a second interior turned surface  51  and this surface cooperates with second cylindrical part  52  on the functional component, which has a somewhat, preferably 2-5 mm, larger diameter than guider pin  50 . The length of these two turned parts  50  and  52  respectively preferably is 10-20 mm. On the cylindrical part  52  there is also an O-ring groove  53  with a mounted O-ring  54 . 
         [0066]    In order to be able to fix functional component  5  to distributor  3  connection end  55  is provided with a resilient, open/slit locking ring  48 , mounted in a groove  56 , which is located on cylindrical part  57 , which has a diameter, which is a few additional mm longer than the adjacent cylindrical surface  52 . Cylindrical part  57  locks the position of locking ring  48  in an axial direction and this locked position is also secured by flange part  58 , which constitutes the transition from connection end  55  of the functional component to that part, which contains the functional part itself. 
         [0067]    On cut-off  30  of the distributor there is a cylindrical interior surface  59 , immediately outside surface  51 , with a turned groove  60 , which has a width and a depth, which are chosen in order to be able to cooperate with locking ring  48  and cylindrical part  57  of connection end  55 . 
         [0068]    When connection end  55  is pushed into cut-off  30 , the two open end portions  61  of locking ring  48  are pressed together and are not released, until the connection end has entered into its final position. Then the legs of the locking ring spring outwards and into groove  60  and locks the connection in an axial direction. 
         [0069]    The functional component can always be dismounted, since it is then only necessary to press the two end portions together or the legs on locking ring  48  and subsequently it is easy to draw out connection  55  from cut-off  30 . 
         [0070]    In order to control the functional component—prevent it from rotating—cut-off  30  is provided with two diametrically opposed projecting portions  62 . These portions  62  have an inner diameter, which is somewhat larger than the outer diameter of the cooperating recess  63  in connection end  55 . When functional component  5  is pushed into the distributor, projecting portions  62  climb on or pass surface  63  on connection end  55 . The periphery and the projecting length of portions  62  is coordinated with corresponding recess  63  in flange portion  58  of connection end  55 . 
         [0071]      FIG. 5  shows, how a distributor  3  is mounted in profile  4 . 
         [0072]    Profile  4  preferably is an extruded Al-profile and its main task it to rotationally fix the distributor. According to the present invention the profile is designed to be able to fix two rows of distributors, which means, that one row with e.g. three integrated distributors are placed in one row, whereas the corresponding three distributors are mounted in a second row. 
         [0073]    The distributors are fixed in a rotational direction, since profile  4  is provided with circular segments  73  and  74  respectively with three and two respective grooves  64 , which have a width and a depth, which are coordinated with the thickness and the radial extension of springs  65  on distributors  3 . Distributors  4  preferably have springs, one spring passing through the center of cut-off  30 . These springs may within the scope of the present invention have various lengths and shapes, but the function to control the position of the distributors in relation to profile  4  as well as to obtain an improved symmetry regarding the manufacture/casting of the distributors is the main function. 
         [0074]    The distance between the two distributor rows in profile  4 , from the center of the distributors, is to be chosen in such a way, that it will be easy to obtain a simple joining of the various components, which will be mounted in a certain installation situation. Thus, a distance is chosen in a height direction as well as in another direction, which means, that components can be mounted and service be carried out and at a minimal cost. One example of a distance between the two rows is, that “a=80 mm” and “b=40 mm”. The “a-distance” is a measure, which indicates the lateral displacement between the centers of the two distributor rows, whereas the “b-distance” indicates the height difference between the centers of the distributor rows. 
         [0075]    Profile  4  essentially is an L-profile, which also has been developed to comprise two circular portions and which in a cross-section is designed in such a way, that these circular segments constitute portions, which touch the two legs of the L-profile. The L-profile has a bottom surface  70  and an angular surface  71 , which in its upper part has a reinforcement  72 , which constitutes an extension of surface  71  and preferably has an angle of 90°. 
         [0076]    Reinforcement  72  extends at right angles from angular surface  71  and is also then bent again downwards towards bottom surface  70 . Reinforcement  72  is finally transformed into a first concave circular segment  73  with a circumference of altogether 180°, which in its rear part, after 90° reaches angular surface  71 , where the angular surface constituting the bottom of one of the three grooves  64 , which have been formed on circular segment  73 . In the lower edge of circular segment  73  the profile extends an additional distance, a surface  75 , away from angular surface  71  and in parallel with bottom surface  70 . Depending on the diameter of distributor  3 , which preferably is smaller, than what is true for measurement “b” for the profile, the profile comprises also an oblique plane  76 , which connects surface  75  with a second cylindrical, concave circular segment  74 , which at its lower part is terminated with a groove  64 , the bottom part of which constitutes a part of the total bottom surface  70 . Circular segment  73  is provided with three grooves  64  with a 90° division, the center groove extending at right angles outwards from angular surface  71 . 
         [0077]    Second circular segment  74  comprises only two grooves  64 , one of them extending at right angles outwards from bottom surface  70  and the second groove being displaced 90° and towards angular surface  71 . The radius of the two circular segments  73  and  74  is chosen in such a way, that it will interact with the outer diameter of distributors  3 . 
         [0078]    Profile  4  may of course be designed in a somewhat different way within the scope of the invention. Its main function is to fix distributors  3  in suitable positions and also indirectly in relation to cabinet  7 , since the profile preferably will be fastened to cabinet  7  with screws in a suitable way. 
         [0079]    The profile also provides a high degree of motion regarding the mounting of the distributors and then also other components. Since the profile is completely open in its end portions, it is easy to replace the distributors, because they do not have to be screwed or in other ways be locked in an axial direction. 
         [0080]      FIG. 6  shows schematically, how a functional component  5  is designed. 
         [0081]    This component may e.g. be a stop valve, a deaeration valve or a control valve. 
         [0082]      FIG. 6  shows a simple check valve  66  with a measuring nipple  67 . These details are not described exhaustively, because they just constitute examples of components, which can be used in the complete installation unit  1 . 
         [0083]      FIG. 7  shows, how a functional component  5  is connected to distributor  3  and to the load side. 
         [0084]    From installation unit  1  a number of loops or tubes  32 , connected in parallel, extend outwards to radiators or convectors or similar energy devices and the return from these loops  33  is connected to return connection  34  of functional component  5  by means of e.g. a pipe coupling  35 . According to  FIG. 7  distributor  3  is in this case provided with two cut-offs  30  and thus to these two cut-offs two functional components are connected. Functional components are in this case a standardized variant of a temperature-guided check valve  66  with mounted directly acting adjusting devices  69 . Also, in this case the functional component is provided with a measuring nipple  67 . 
         [0085]    The described design of the functional component must only be regarded as one example of the construction of the complete installation unit  1 . 
       COMPONENT LIST 
       [0000]    
       
           1 =complete installation unit 
           2 =installation unit 
           3 =distributor 
           4 =profile 
           5 =functional component 
           6 =primary piping system 
           7 =cabinet 
           8 =intake 
           9 =return 
           10 =connection end 
           11 =balancing valve 
           12 =measuring nipple 
           13 =measuring nipple 
           14 =connection piece 
           15 =connection piece with a plug 
           16 =differential pressure valve 
           17 =measuring nipple 
           18 =plug 
           19 =coupling 
           20 =back plate 
           21 =bottom plate 
           22 =lateral piece 
           23 =lateral piece 
           24 =lid 
           25 =− 
           26 =flange 
           27 =end flange 
           28 =pipe passthrough 
           29 =stop valve 
           30 =cut-off 
           31 =pipe coupling 
           32 =tubular loop 
           33 =tubular loop 
           34 =return connection 
           35 =pipe coupling 
           36 =female part 
           37 =male part 
           38 =O-ring 
           39 =cylindrical part 
           40 =O-ring groove 
           41 =inner diameter 
           42 =cylindrical part 
           43 =groove 
           44 =shoulder 
           45 =radius 
           46 =cylindrical portions 
           47 =flange 
           48 =locking ring 
           49 =turned surface 
           50 =guide pin 
           51 =turned surface 
           52 =cylindrical part 
           53 =O-ring groove 
           54 =O-ring 
           55 =connection end 
           56 =groove 
           57 =cylindrical part 
           58 =flange part 
           59 =cylindrical surface 
           60 =groove 
           61 =end parts 
           62 =projecting parts 
           63 =recess 
           64 =groove 
           65 =springs 
           66 =check valve 
           67 =measuring nipple 
           68 =− 
           69 =adjusting device 
           70 =bottom surface 
           71 =angular surface 
           72 =reinforcement 
           73 =first circular segment 
           74 =second circular segment 
           75 =surface 
           76 =oblique plane 
           77 =recess