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2-PORT BALANCED PRESSURE FLANGED PN 16 (-10...150 °C) SEAT VALVES

VBG 2..

 clicca sull'immagine per ingrandire
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APPLICATION

Control valves for : 

  • Hot water and superheatedwater, max. 150 °C,

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

  • Steam, max. 2 bar (absolute)

FEATURES

  • Body in cast iron.

  • Spindle in AISI 303 stainless steel.

  • Plug in bronze.

  • Flanged ends PN16.

  • Control: equal percentage.

  • Let by : 0.03% Kvs.

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

1.33 s/mm

 MVA 064 

1.33 s/mm

 Data sheet
          bar(2) s(3) bar(2) s(3)  
VBG 280   80 100 45 2 60 2 60 M 972
VBG2100   100 130 45 2 60 2 60
VBG2125   125 200 45 2 60 2 60
VBG2150   150 300 45 2 60 2 60

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

  • (2) : bar ­ Maximum pressure differential (∆p max) permitted by actuator. - 100 kPa = 10 mWG = 1 bar

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

SIZING CHART FOR STEAM VALVES VBG

  • Pv ­ Absolute pressure of saturated steam in bar at valve entry.

  • Tv ­ Temperature of saturated steam in °C at valve entry.

  • Gv ­ Flow of saturated steam in kg/h.

  • Gs ­ Flow of superheated steam in kg/h.

  • Qv ­ Quantity of heat contained in saturated steam in kW.

  • Dts ­ Overtemperature of superheated steam in °C.

  • Dp ­ Pressure drop of valve in bar.