| SIEMENS |                    | 4320   |
|---------|-------------------------|--------|
|    |                    |   |   |
|    | Two-Way Valve           |   |   |
|    |                    |   |   |
|    | Flange Connection, PN10 |   | VVF31 |

|   |                                                 |
|--------|------------------------------------------------------|
|   | Flange connection two-way valve, pressure grade PN10 |
|   | l                                                    | Valve body: ductile cast iron GG-25 |
|   | l                                                    | Nominal diameter: DN25...150mm |
|   | l                                                    | Flow rate: kvs 5...300m3/h |
|   | l                                                    | Stroke of valve handle: 20 or 40mm |
|   | l                                                    | Can be mounted with the SQX..., SKD..., SKB...and SKC... series of actuator. |

|    |                                                                                                                                                                  |
|---------|-----------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| Purpose | Be applicable in heating system and heating, ventilating and air conditioning system as the control valve or safety shutoff valve that comply with DIN32730 Standard. |
|    | Be only applicable for closed system.                                                                                                                                 |
|    |                                                                                                                                                                  |   |
| Media   | The standard valves that adopt the standard seal are applicable to the following media:                                                                               |
|    |                                                                                                                                                                  |   |
|    | Chilled water                                                                                                                                                         |   |
|    |                                                                                                                                                                  |   |
|    | Low temperature hot water                                                                                                                                             |   |
|    |                                                                                                                                                                  |   |
|    | High temperature hot water                                                                                                                                            | -25...+130°C |
|    |                                                                                                                                                                  |   |
|    | Anti-freezing water 1)2)                                                                                                                                              |   |
|    |                                                                                                                                                                  |   |
|    | Brine 1)2)                                                                                                                                                            |

|                          |
|-------------------------------|
| Siemens Building Technologies |   |
| CM1N4320C/06.2003             |   |
| HVAC Products                 |   |
| 1/6                           |   |

----

|   | 1) | When the media temperature is lower than 0°C, ASZ6.5 valve handle heating element is needed to prevent the valve handle within sealing gland from freezing. |
|--------|----|------------------------------------------------------------------------------------------------------------------------------------------------------------------|

|   | 2) | Anti-freezing water and brine: the minimum temperature -10°C complies with DIN 3158 Standard (pressure vessel I) or the minimum temperature -25°C complies with DIN 3158 Standard (pressure vessel II). |
|--------|----|-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|

| Model    | DN[mm] | kVS[m3/h] |   Sv | △Pvmax.[kPa] |
|----------|--------|-----------|-----------|--------------------|
|     |   |      |      |               |
| VVF31.24 | 25/20  | 5         | >50    |               |
| VVF31.25 | 25     | 7.5       |      |               |
| VVF31.39 | 40/32  | 12        |      |               |
| VVF31.40 | 40     | 19        |      |               |
| VVF31.50 | 50     | 31        |      | 100                |
| VVF31.65 | 65     | 49        |      |               |
| VVF31.80 | 80     | 78        | >100   |               |
| VVF31.90 | 100    | 124       |      |               |
| VVF31.91 | 125    | 200       |      |               |
| VVF31.92 | 150    | 300       |      |               |

| Accessories | Electronic valve handle heating element, AC 24V; when the medium temperature is lower than 0°C, select ASZ6.5 |
|-------------|--------------------------------------------------------------------------------------------------------------------|

| Order | Please describe the model when ordering the purchase For example: VVF31.50 |
|-------|----------------------------------------------------------------------------|

|                          |
|-------------------------------|
| Siemens Building Technologies |   |
| CM1N4320C/06.2003             |   |
| HVAC Products                 |   |
| 1/6                           |   |

----

| Transportation | The valve and actuator are packaged and supplied separately. There is no inverse flange and flange gasket when the valve is supplied. |
|----------------|---------------------------------------------------------------------------------------------------------------------------------------|

| Valve          |   H100[mm] | Actuator 1)           |
|----------------|----------------------|-----------------------|
| SQX...2)   | SKD...           | SKB...            | SKC... |
| △Pmax    | △Ps            | △Pmax           | △Ps | △Pmax | △Ps | △Pmax | △Ps |
| [kPa]          |
| VVF31.24       |    20 |    100 | 1000 |    100 | 1000 |    100 |    1000 |   |   |
| VVF31.25       |                 |                  |
| VVF31.39       | 500                  | 750                   |   |   |
| VVF31.40       |                 |                  |
| VVF31.50       | 300175100            | 450250150             |   |   |
| VVF31.65       | 700450               |                  |   |
| VVF31.80       | 80                   |                  |   |
| VVF31.90       |  40             |                  |   |   |   |   |   |  100 | 300175125 |
| VVF31.91       |
| VVF31.92       |
| Technical data | 4554                 | 4561                  | 4564 |

|   | 1) | Optional actuator:   ●     AC 24V/AC 230V power source, three-position control signal |
|--------|----|---------------------------------------------------------------------------------------------------------------------------|

|   | 2) | △Pmax and △P values are applicable for SQX32.../SQX82...and SQX62 new actuator, and the delivery can be available from January, 1999. |
|--------|----|-----------------------------------------------------------------------------------------------------------------------------------------------------------|

|   | H100     = | 100% stroke of valve and actuator |
|--------|--------------------------------|-----------------------------------|

|   | △Pmax  = | maximum allowable differential pressure between both ends of valve, when the actuator can maintain normal operation within the whole stroke |
|--------|---------------------|---------------------------------------------------------------------------------------------------------------------------------------------|

|   | △Ps       = | maximum allowable differential pressure (shut-off pressure) between both ends of valve, on the premise of ensuring the actuator can be closed safely |
|--------|--------------------------------------------|------------------------------------------------------------------------------------------------------------------------------------------------------|

|                          |
|-------------------------------|
| Siemens Building Technologies |   |
| CM1N4320C/06.2003             |   |
| HVAC Products                 |   |
| 1/6                           |   |

----

|   |   |   |
|--------|--------|--------|

| Mechanical design  |   |   |   | Valve plug with pilot hole is connected with valve handle directly.Valve seat is attached to valve body directly. |
|--------------------|--------|--------|--------|-------------------------------------------------------------------------------------------------------------------|
| Valve body profile |   |
|               |   |
|               |   |
|               |   |

|          |   | Note: the two-way seat valve cannot be used as three-way valve by disassembling the blank flange at the bottom of valve.                              |
|----------|--------|-------------------------------------------------------------------------------------------------------------------------------------------------------|
|     |   |                                                                                                                                                  |
| Disposal |   | Due to the use of different types of materials, before discarding, do disassemble the valves, and classify them in terms of different material types. |
|     |   |                                                                                                                                                  |

|                          |
|-------------------------------|
| Siemens Building Technologies |   |
| CM1N4320C/06.2003             |   |
| HVAC Products                 |   |
| 1/6                           |   |

----

|  |   | Valve flow characteristics0...30%  => flow and stroke are in linear scale30...100%=> comply with VDI/VDE2173 Standard, ngl=3 |
|--|--------|------------------------------------------------------------------------------------------------------------------------------------------------------|

|                          |
|-------------------------------|
| Siemens Building Technologies |   |
| CM1N4320C/06.2003             |   |
| HVAC Products                 |   |
| 1/6                           |   |

----

|   |   | The operating temperature range (-25...+130°C) complies with DIN 4747 and DIN 3158 Standards. |
|--------|--------|--------------------------------------------------------------------------------------------------------|

|   |   |   |
|--------|--------|--------|

| Engineering | It is suggested that the valve be mounted on the return water pipe, because in the heating system, the temperature of return water pipe is relatively low. In this way, the service life of valve spool seal can be extended. |
|-------------|-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|

|   | The water quality shall comply with VDI 2035 Standard. |
|--------|--------------------------------------------------------|

|  | It is suggested that in the closed system, the filter be mounted, so as to increase the operational reliability of valve. |
|--|---------------------------------------------------------------------------------------------------------------------------|

|  | When the medium temperature is lower than 0°C, select ASZ6.5 electronic valve handle heating element to prevent the valve spool within the sealing gland from freezing. For the sake of safety, the operating voltage of this heating element is designed AC 24V, and its power is 30 W. |
|--|-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|

| Mounting | The valve and actuator can be assembled in the mounting position simply, independent of special tools and any adjustment. |
|----------|---------------------------------------------------------------------------------------------------------------------------|

|   | The valve shall be attached with the Instruction for Mounting before leaving the factory. |
|--------|-------------------------------------------------------------------------------------------|

| Allowed                 |   |   | Forbidden                                   |
|-------------------------|--------|--------|-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
|                    |   |   |                                                                                                                                                                                                                  |
| Direction of water flow |   |   | During the mounting, pay attention that the mark of water current direction on the valve shall be consistent with the                                                                                                 |
|                    |   |   |                                                                                                                                                                                                                  |
|                    |   |   | actual water current direction.                                                                                                                                                                                       |  |
|                    |   |   |                                                                                                                                                                                                                  |
| Debugging               |        |   | Debug the valve only after the actuator has been mounted correctly.                                                                                                                                                   |
|                    |   |   | Valve handle contracts: flow increases                                                                                                                                                                                |
|                    |   |   | Valve handle extends: flow decreases                                                                                                                                                                                  |

|                          |
|-------------------------------|
| Siemens Building Technologies |   |
| CM1N4320C/06.2003             |   |
| HVAC Products                 |   |
| 1/6                           |   |

----

| Repair |  | When repairing the actuator, comply with the following sequences: first turn off the water pump and cut off the water pump power source; close the stop valve, drain the water within the water pipe in order to reduce the pressure within water pipe and cool the water pipe naturally; remove the electrical wiring from connection terminal. Before re-debugging the valve, correctly mount the actuator properly. |
|--------|--|------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|

| Seal of valve handle | When the water pipe has de-pressurized and is cooled fully, and the valve handle surface is in good condition, it is allowed to replace the seal of valve handle directly, without removing the valve body. If the valve handle has been damaged, replace the whole valve handle-valve plug assembly. Please contact the local office of Siemens Building Technologies. |
|----------------------|-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|

| Accessories    |                                                                                                                       |                                                                                                                   |
|----------------|----------------------------------------------------------------------------------------------------------------------------|------------------------------------------------------------------------------------------------------------------------|
| Standard model |                                                                                                                            | Used to replace EPDM-O ring, including copper seal gasket.                                                             |
|           | Applicable media of standard model: chilled water, low temperature hot water, high temperature hot water and brine.        |
|           | Temperature range of media: -25...+130°C                                                                          |
|           |  Applicable to VVF31...series of valve, pipe diameter DN25...80 (diameter of valve handle 10 mm) 4 284 8806 0 |
|           |                                                                                                                       | Applicable to VVF31...series of valve, pipe diameter DN100...150 (diameter of valve handle 14 mm) 4 679 5629 0 |

| Guarantee | The valves shall not be guaranteed if the actuator is manufactured the third manufacturer. |
|-----------|--------------------------------------------------------------------------------------------|

|   |   | The technical data, including △Pmax, △Ps, leakage rate, noise index and lifetime are only applicable to the corresponding actuators of Siemens Building Technologies included in the “Model overview”. |
|--------|--------|--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|

|                          |
|-------------------------------|
| Siemens Building Technologies |   |
| CM1N4320C/06.2003             |   |
| HVAC Products                 |   |
| 1/6                           |   |

----

|     |   | Technical data               |   |                                                                                                 |   |   |
|----------|--------|------------------------------|--------|------------------------------------------------------------------------------------------------------|--------|--------|
|     |   | Functional parameter         |   | PN (pressure) grade                                                                                  |   | PN10   |
|     |   | Valve flow characteristics   |   |                                                                                                 |   |   |
|     |   | 0...30%                  |   | linear                                                                                               |   |   |
|     |   | 30...100%                |   | ngl=3, comply with VDI / VDE 2173 Standard                                                           |   |   |
|     |   | Leakage rate                 |   | kvs 0...0.02%, comply with VDI / VDE 2173 Standard                                               |   |   |
|     |   | Allowable operating pressure |   | Within -25...+130, 1000kPa (10 bar), comply with ISO 7268 / EN 1333 /DIN 4747 / DIN3158 Standard |   |   |
|     |   | Flange connection            |   | ISO 7005                                                                                             |   |   |
|     |   | Stroke                       |   |                                                                                                 |   |   |
|     |   | - DN25...80              |   | 20mm                                                                                                 |   |   |
|     |   | - DN100...150            |   | 40mm                                                                                                 |   |   |
| Material |   | Valve body                   |   | GG-25 complies with DIN EN 1561 Standard                                                             |   |   |
|     |   | Valve handle                 |   | Stainless steel                                                                                      |   |   |
|     |   | Valve plug                   |   |                                                                                                 |   |   |
|     |   | DN25...65                |   | Brass                                                                                                |   |   |
|     |   | DN80...150               |   | Bronze                                                                                               |   |   |
|     |   | Seal ring                    |   |                                                                                                 |   |   |
|     |   | Standard model               |   | Brass                                                                                                |   |   |
|     |   | Seal material                |   | EPDM-O ring                                                                                          |   |   |
|     |   |                         |   |                                                                                                 |   |   |

|                          |
|-------------------------------|
| Siemens Building Technologies |   |
| CM1N4320C/06.2003             |   |
| HVAC Products                 |   |
| 1/6                           |   |

----

| DN = | nominal diameter |
|------|------------------|

| H    = | total height of actuator plus minimum mounting space of mounting, connecting and operation, or the minimum distance required by maintenance to the ceiling or wall |
|-----------------------|--------------------------------------------------------------------------------------------------------------------------------------------------------------------|

| H1  = | distance from the center line of water pipe to the mounting edge (upper edge) of actuator |
|-----------------|-------------------------------------------------------------------------------------------|

| H2  = | position when the valve is fully open (it means the valve handle extends completely) |
|-----------------|--------------------------------------------------------------------------------------|

|                          |
|-------------------------------|
| Siemens Building Technologies |   |
| CM1N4320C/06.2003             |   |
| HVAC Products                 |   |
| 1/6                           |   |

----