Page 52 - C.B.Trading-Avcon Ecatalogue
P. 52

Control Valves







                                    7912A/B-NC / 7922A/B-NO 2-Way



      2-Way Pneumatic on-off & Control Valves with Multispring

      Diaphragm Actuator.(Normally Closed or Normally Open
      Design)Field Reversible from Normally Closed to
      Normally Open,or Normally Open to Normal







             Specifications



       Size:                               15 mm (½”) to 150mm (6 ”).

       Pressure Rating:                    As per ANSI Cl. 300 and PN 25


       Design Standard:                    As per ASME B16.34.


       Seat Ring :                        Screwed type replaceable.

       Face to Face :                      As per DIN 3202. Part I Series F1


       Bonnet Material :                   WCB (DIN 1.0619 GS-C 25)

       Spindle:                              SS 316/410 Ground, Burnished and Hard Chromed.


       Hex. Nuts:                          ASTM A 194 Gr. 2H

       Seat ring material:                  SS AISI 420/316.


       Pressure chambers:                 Steel pressing to IS 513CRCD

       Temperature:                        -20°C to + 80°C


       Max. Pres. over::                  Upto 4 bar.

       Spindle:                           Guided through a PTFE bearing, leakage prevented
                                          by Synthetic seal, protected by rubber bellow


       Unified Flanges:                     As per ANSI CI 150/300 and PN 16


       Gland Packing:                     Grafoil, CFT & PTFE



       Fluids:                             Air, Water, Mild Corrosive Chemical, Vacuum
                                           10-3 Torr)* , Steam, Gas, etc



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