User Manual

ManualsBrandsSiemens ManualsLarge Stroke (BC1)2-port valves PN25, flanged connections, VVF52..

373

Acvatix™

2-port seat valves PN25 with

flanged connection

VVF52..

 Nodular cast iron EN-GJS-400-18-LT valve body

 DN 15...40

 k

0.16...25 m

 Can be equipped with SAX..-electromotoric or SKD..- or SKB..-

electrohydraulic actuators

Use

For use in district heating, heating, ventilating, and air conditioning systems as a control

or safety shutoff valve.

Control devices MK..5.. (water) or MK..5..G (steam) are TÜV

approved per DIN EN 14597 and can therefore be used as control devices with

safety shut-off function for temperature and pressure limitation.

For open and closed circuits (mind "Cavitation", refer to page 6).

Silicon-free va

lve versions with type suffix ..M available.

CM1N4373en

15.11.2010

Building Technologies

Summary of content (12 pages)

PAGE 1
4 373 Acvatix™ 2-port seat valves PN25 with flanged connection     VVF52.. Nodular cast iron EN-GJS-400-18-LT valve body DN 15...40 kvs 0.16...25 m3/h Can be equipped with SAX..-electromotoric or SKD..- or SKB..electrohydraulic actuators Use For use in district heating, heating, ventilating, and air conditioning systems as a control or safety shutoff valve. Control devices MK..5.. (water) or MK..5..
PAGE 2
Type summary Product number DN VVF52.15-0.16 3 kvs [m / h] Sv 0.16 VVF52.15-0.2 0.2 VVF52.15-0.25 0.25 VVF52.15-0.32 0.32 VVF52.15-0.4 0.4 VVF52.15-0.5 0.5 VVF52.15-0.63 0.63 15 VVF52.15-0.8 VVF52.15-1 50…100 0.8 1 VVF52.15-1.25 1.25 VVF52.15-1.6 1.6 VVF52.15-2 2 VVF52.15-2.5 2.5 VVF52.15-3.2 3.2 VVF52.15-4 4 VVF52.25-5 5 VVF52.25-6.3 25 VVF52.25-8 VVF52.25-10 6.3 8 10 VVF52.40-12.5 100…200 12.5 VVF52.40-16 40 VVF52.40-20 VVF52.
PAGE 3
Ordering Example: Product number VVF52.15-0.25 Stock number Designation VVF52.15-0.25 Quantity 2-port seat valve PN25 with flanged connection 1 Delivery Valves, actuators and accessories are packed and supplied separately. The valves are supplied without counter-flanges and without flange gaskets. Spare parts, Rev no. See overview, page 12. Equipment combinations Valves Actuators SAX.. H100 pmax 1) SKD.. ps pmax [mm] VVF52.15.. VVF52.25.. 20 VVF52.40.. 1) 1) 2) 3) SKB..
PAGE 4
The VVF52..G valves (for saturated steam / super-heated steam) cannot be used with pneumatic actuators. 4373Z02 Valve cross section 4373Z01 Technical design / mechanical design Standard version VVF52.. Special version VVF52..G for chilled water, cooling water, lowfor saturated steam, super-heated steam temperature hot water, high-temperature up to max.
PAGE 5
SKB.. Flow diagram SKD.. SAX.. Sizing max V100 [l/s] V100 [m³/h] -k DN 25 0 4 - 20 40 pmax = pv100 = V Maximum permissible differential pressure across the valve, valid for the entire actuating range of the motorized valve Differential pressure across the fully open valve and the valve’s control path by a volume flow V100 = Volume flow through the fully open valve (H100) = = 1 bar  10 mWC 0.
PAGE 6
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 flow diagram on page 5 and by adhering to the static pressures shown below. Note on chilled water To avoid cavitation in chilled water circuits ensure sufficient counter pressure at valve outlet, e.g. by a throttling valve after the heat exchanger.
PAGE 7
VVF52..A VVF52..G VVF52..M 4373D05 Working pressure [bar] VVF52.. Working pressure and medium temperature Fluids 25 24 23 22 21 20 19 18 1 0 -80 -70 -60 -40 -20 -10 0 20 80 100 120 150 180 200 Medium temperature [°C] Working pressure and medium temperature staged as per ISO 7005 SKB.. SKD.. 10 6 4 3 2 1 2 3 1 100 110 120 130 140 150 160 170 180 4373D09 Saturated steam Superheated steam Absolute working pressure [bar] Current local legislation must be observed. ≤ 180 °C VVF52..
PAGE 8
Example given saturated steam 151.8 °C p1 = 500 kPa (5 bar)  m = 460 kg/h pressure ratio required procedure kvs, valve type p3  p1  kvs, valve type 30  p1 100 p 3  500  k vs  4.4  selected = 30 % saturated steam 151.8 °C = 500 kPa (5 bar) p1  m = 460 kg/h pressure ratio = 42 % (supercritical permitted) 30  500  350 kPa (3.5bar ) 100 460 350  (500  350 )  1  8.83 m3 / h kvs = 10 m3/h  VVF52.25-10G k vs  8.8  460  1  8.09 m3 / h 500 kvs = 8 m3/h  VVF52.
PAGE 9
Direction of flow When mounting, pay attention to the valve's flow direction symbol . VVF52..  Standard Direction of action: closes against pressure VVF52..G  Steam Direction of action: closes on pressure Commissioning Commission the valve only if the actuator has been mounted correctly. Valve stem retracts: Valve stem extends: valve opens valve closes = increasing flow = decreasing flow Maintenance VVF52.. valves require no maintenance.
PAGE 10
Technical data Functional data PN class PN 25 to ISO 7268 Working pressure to ISO 7005 within the permissible "medium temperature" range according to the diagram on page 7 Flow characteristic • 0…30 % • 30…100 % • linear • equal percentage; ngl = 3 to VDI / VDE 2173 0…0.
PAGE 11
Dimensions B K L3 D D4 H1 D2 H2 H Dimensions in mm 4373M01 L2 L1 DN B D D2 D4 Ø Ø Ø 15 16 95 25 18 40 20 K L1 L2 L3 46 65 130 65 69 115 65 85 160 80 73 150 19 (4x) 84 110 200 100 97.5 14 (4x) H1 H2 H SAX.. SKD.. 64 160.5 > 506 > 564 57 153.5 > 499 > 557 kg SKB.. [kg] 4.3 > 639 5.8 8.9 DN = Nominal size H = Total actuator height plus minimum distance to the wall or the ceiling for mounting, connection, operation, maintenance etc.
PAGE 12
Spare parts Order numbers for spare parts Sealing gland Set Product number 4382Z05 4373Z03 Plug with stem, circlip, sealing VVF52.. VVF52..A, VVF52..G VVF52..M VVF52.15-0.16 4 284 8806 0 4 284 8829 0 4 284 9538 0 VVF52.., VVF52..G, VVF52..M, VVF52..A VVF52.15-0.2 4 284 8806 0 4 284 8829 0 4 284 9538 0 VVF52.15-0.25 4 284 8806 0 4 284 8829 0 4 284 9538 0 VVF52.15-0.32 4 284 8806 0 4 284 8829 0 4 284 9538 0 VVF52.15-0.4 4 284 8806 0 4 284 8829 0 4 284 9538 0 VVF52.15-0.