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2-PORT BALANCED PRESSURE FLANGED PN 25 (-10...230 °C) SEAT VALVES

VBS 2..

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APPLICATION

Control valves for : 

  • Hot water and superheatedwater, max. 230 °C,

  • Chilled water, min. ­10 °C (glycol max. 50%),

  • Steam, max. 7 bar absolute.

FEATURES

  • Body in spheroidal cast iron UNI ISO 1083-400-15.

  • Spindle, seat and plug in stainless steel AISI 303.

  • Flanged ends PN25.

  • Control: equal percentage.

  • Let by: 0.02% Kvs.

          Suitable actuators  
Code   DN mm. Kvs (1) m3/h Run  mm. MVL ... 

1.33 s/mm

MVA 064 

1.33 sec./mm

 Data sheet
          bar(2) s(3) bar(2) s(3)  
VBS 223   25 4 16,5 7 22 7 22 M 971
VBS 224   25 6,3 25 7 33 7 33
VBS 225   25 10 25 7 33 7 33
VBS 232   32 16 25 7 33 7 33
VBS 240   40 25 25 7 33 7 33
VBS 250   50 40 25 7 33 7 33
VBS 265   65 63 25 7 33 7 33

  • (1) : Kvs ­ Flow coefficient: Flow in m3/h with valve open and pressure drop of  100 kPa   - 100 kPa = 10 mWG = 1 bar.

  • (2) : bar ­ Maximum pressure differential (∆p max) permitted by actuator.

  • (3) : s ­ Time (seconds) necessary for actuator to make the complete valve run.

SIZING CHART FOR STEAM VALVES VBS