2-port and 3-port seat valves, PN16

Transcription

1 s 4 47 VVI47 VXI47 CVTIX 2-port and 3-port seat valves, PN6 with internally threaded connections VVI47.. VXI47.. ronze valve body CC49K (Rg5) DN k vs m 3 /h Internally threaded connections Rp.. as to ISO 7- Can be equipped with SX - electromotoric Use For use in heating, in ventilating and air conditioning systems as a control or safety shutoff valve. For open and closed circuits (mind Cavitation, refer to page 4). CN447en uilding Technologies

2 Type summary Product number DN k vs S v 2-port 3-port [m 3 /h] VVI VXI VVI VXI > 5 VVI VXI VVI VXI VVI VXI > VVI VXI VVI VXI DN = Nominal size k vs = Nominal flow rate of cold water (5 3 C) through the fully open valve (H ), by a differential pressure of kpa ( bar) S v = Rangeability k vs/ k vr as per VDI 273 k vr = The lowest value for k v at which the characteristic tolerance is still maintained, at a differential pressure of kpa ( bar) Ordering Example: Product number Stock number Designation Quantity VVI VVI port seat valve PN6 with internally threaded connection Delivery Valves, actuators and accessories are packed and supplied separately. Equipment combinations Valves ctuators SX.. H Dp max ) Dp max 2) Dp s [mm] [kpa] [kpa] [kpa] VVI VXI VVI VXI VVI VXI VVI VXI VVI VXI VVI VXI VVI VXI ) 2) For 3-port valves in diverting function, max. kpa is recommended. If noise is permitted, the same values apply as for mixing applications. Valid for 2-port valves only Dp max = Maximum permissible differential pressure across the valve's control path, valid for the entire actuating range of the motorized valve (maximum recommended operating differential pressure) Dp s = Maximum permissible differential pressure at which the motorized valve will close securely against the pressure (close off pressure) ctuator overview Product number ctuator type Operating voltage Positioning signal SX3 C 23 V Electromotoric C 24 V 3-position SX8 SX6 DC V ) ) or DC 4 2 m with ZX42 function module Spring return Positioning function time force - 2 s 7 N For VXI47.. the application is only possible if the valve is used as mixing valve. 2 / 8 Siemens 2-port and 3-port seat valves, PN6 CN447en uilding Technologies

3 Technical design / Mechanical Design VVI47.. mixing VXI47.. diverting 4362Z7 = % = % = % The 2-port seat valve does not become a 3-port valve by removing the blank fitting. Sizing Flow diagram DN - kvs Dp v = Differential pressure across the fully open valve and the valve s control path by a Volumetric flow V & &V = Volumetric flow through the fully open valve (H ) kpa = bar» mwg m 3 /h =.278 l/s water at 2 C Siemens 2-port and 3-port seat valves, PN6 CN447en uilding Technologies / 8

4 Valve flow characteristics VVI47.. VXI Stroke H / H Stroke H / H Cavitation Note on chilled water Cavitation accelerates wear on the valve plug and seat, and also results in undesirable noise. Cavitation can be avoided by not exceeding the differential pressure shown in the "Working pressure and medium temperature" on page 5, and by adhering to the static pressures shown below. To avoid cavitation in chilled water circuits ensure sufficient counter pressure at valve outlet, e.g. by a throttling valve after the heat exchanger. Select the pressure drop across the valve at maximum according to the 8 C curve in the flow J Dp max = Differential pressure with valve almost closed, at which cavitation can largely be avoided p = Static pressure at inlet p 3 = Static pressure at outlet M = Pump J = Water temperature M p Dpmax p Z6 Hot water example: Pressure p at valve inlet: 5 kpa (5 bar) Water temperature: 8 C From the diagram above, it will be seen that with the valve almost closed, the maximum permissible differential pressure Dp max is 3 kpa (3 bar). 4 / 8 Siemens 2-port and 3-port seat valves, PN6 CN447en uilding Technologies

5 Chilled water example: Spring water cooling as an example of avoiding cavitation: Chilled water = 2 C p p 4 Dp max Dp 3-3 = 5 kpa (5 bar) = kpa ( bar) atmospheric pressure = 3 kpa (3 bar) = 2 kpa (.2 bar) Dp D (throttle) = 8 kpa (.8 bar) p 3 = pressure after consumer in kpa M p 4 p Dp D Dp max p 3 p 3 ' 4382Z7 Working pressure and medium temperature Working pressure [bar] Medium temperature [ C] Working pressure and medium temperature staged as per ISO 75. Current local legislation must be observed. Notes Engineering We recommend installation in the return pipe, as the temperatures in this pipe are lower for applications in heating systems, which in turn, extends the stem sealing gland's life. Water quality requirements as per VDI 235. We generally recommend to install a strainer to increase the valve's functional safety. Mainly use VXI47 as 3-port mixing valve. Mounting oth valve and actuator can easily be assembled at the mounting location. Neither special tools nor adjustments are required. The valve is supplied with mounting instructions no Mounting positions 9 9 Direction of flow When mounting, pay attention to the valve's flow direction symbol : 2-port 3-port mixing 3-port diverting Commissioning Commission the valve only if the actuator has been mounted correctly. Siemens 2-port and 3-port seat valves, PN6 CN447en uilding Technologies / 8

6 Stem retracts: Increasing flow Through-port opens, bypass closes Stem extends: Decreasing flow Through-port closes, bypass opens Maintenance For actuator service work: Turn off the pump and the operating voltage, close the shutoff valves, depressurize the pipes and allow them to cool down. Disconnect the electrical connections, where required, from the terminals. Re-commission the valve only if the actuator has been mounted correctly. Disposal The valve must be dismantled and separated into its various constituent materials before disposal. Observe all local and applicable laws. Warranty The technical data supplied for these valves is valid only for valves used in conjunction with the actuators listed under "Equipment combinations". Use with third-party actuators invalidates any warranty offered by Siemens uilding Technologies / HVC Products. Technical data Functional data PN class PN 6 to EN 333 Industry standards Working pressure Flow characteristic Through port 3 % Through port 3 % ypass (VXI47..) % Leakage rate Through port ypass (VXI47..) Permissible media to ISO 75 within the permissible "Working pressure and medium temperature" range according to the diagram on page 5. Linear Equal percentage; n gl = 3 to VDI / VDE 273 Linear.2 % of k vs value to DIN EN % of k vs value to DIN EN 349 water Cooling water, chilled water, low temperature hot water, high temperature hot water, water with anti-freeze; Recommendation: water treatment to VDI 235 brine Medium temperature 95 C Rangeability S v DN 5: > 5 DN 2: > Nominal stroke 2 mm Pressure Equipment Directive PED 97/23/EC Pressure ccessories as per article, section 2..4 Fluid group 2 without CE-marking as per article 3, section 3 (sound engineering practice) 6 / 8 Siemens 2-port and 3-port seat valves, PN6 CN447en uilding Technologies

7 Environmental compatibility Materials Valve body ronze CC49K (Rg5) Plug Stem Sealing gland Gland materials ISO 4 (Environment) ISO 9 (Quality) SN 3635 (Environmentally compatible products) RL 22/95/EG (RoHS) rass Stainless steel rass EPDM O rings, silicon-free Dimensions / Weight Dimensions Refer to "Dimensions" Connections Internally threaded, Rp to ISO 7- Weight S v = Rangeability k vs/ k vr as per VDI 273 Refer to "Dimensions" k vs = Nominal flow rate of cold water (5...3 C) through the fully open valve by a differential pressure of kpa ( bar) k vr = The lowest value for k v at which the characteristic tolerance is still maintained, at a differential pressure of kpa ( bar) Dimensions L3 Rp H H2 H 447M L2 - L N DN L L2 L3 H H2 H + SX G N [mm] [mm] [mm] [mm] [mm] [mm] [inches] [mm] kg [kg] VVI Rp½ 6.34 VVI > 49 Rp½ 6.34 VVI Rp¾ 6.39 VVI Rp > 5 VVI Rp/ VVI Rp/ > 5 VVI Rp Siemens 2-port and 3-port seat valves, PN6 CN447en uilding Technologies / 8

8 L3 Rp H H2 H 447M2 L2 L N DN L L2 L3 H H2 H + SX G N [mm] [mm] [mm] [mm] [mm] [mm] [inches] [mm] kg [kg] VXI Rp½ 6.54 VXI > 49 Rp½ 6.54 VXI Rp¾ 6.64 VXI Rp > 5 VXI Rp/ VXI Rp/ > 5 VXI Rp Spare parts Order numbers for spare parts Sealing gland 4363Z2 Product number DN VVI VXI VVI VXI VVI VXI VVI VXI VVI VXI VVI VXI VVI VXI For these valves a plug replacement is not possible 8 / 8 ã 23 Siemens Switzerland Ltd Subject to change Siemens 2-port and 3-port seat valves, PN6 CN447en uilding Technologies