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DIAPHRAGM VALVE
Flange Type
(1/2"-10"FLG.)

 

Design Advantages
         

• Solid thermoplastic body and bonnet for best overall corrosion resistance.

• Large diameter molded in stainless steel diaphragm stud for long life service.

• Fully lubricated brass or cast iron stem and sleeve. Sizes 3" and larger have bonnet grease fitting for ease of in service lubrication.

• Extra heavy EPDM diaphragm or optional PTFE diaphragm fully backed by EPDM, for long service life under the most severe conditions.

• Unique concave/convex PTFE/ EPDM diaphragm design insures PTFE barrier returns to full open position.

• Standard, adjustable full close position over travel stop to eliminate premature diaphragm failure due to overtightening.

• Full stroke, fully protected open/close position indication.

• Stainless steel or plastic encapsulated external hardware.

• Longer service life and higher Cv values than rubber lined valves.

• High pressure, temperature and vacuum service rated, suitable for most applications.

• Can be used in lined, metal FRP or thermoplastic piping systems.

• Flanged application valves designed to fit between ANSI B16.5 Class 150 flanges.

 

Materials Of Construction
               
                   

     

 

 

 
 
 
 
 
 
   
   
   
   
 
 
   
 
 
 

VITON® is a trademark of DuPont Performance Elastomers

TEFLON® is a trademark of DuPont Performance Elastomers

 

               
Ansi Dimensions
                 
 
 
         

Testing performed on PVC/PP/EPDM valves at 73°F water temperature, non-shock.

 

Flanged Body Type 1/2" - 10" Diaphragm Valves

               
   
Design Specifications
                 

Thermoplastic Diaphragm Valves  1/2" - 10" Flg.; shall be molded of solid thermoplastic materials for body and bonnet. Body is of the weir configuration exhibiting large flow area and good flow control capability. Body is designed to fit between ANSI B16.5 class 150 flanges. Stem and sleeve shall be brass or cast iron, fully lubricated . Sizes 3" and larger employs a bonnet grease fitting for ease of lubrication. All valves shall have an adjustable overtravel stop in the close position to prevent overtravel and premature diaphragm failure. Full stroke position indication is enclosed in a clear protective cover. All external fasteners shall be either encapsulated in plastic or of stainless steel materials. Materials of construction shall be: (select as required for service)

 

Body

PVC,CPVC,ASTM D-1784,PP,ASTM D-4101,PVDF, ASTM D-3222

 

Bonet

PPO, ASTM D-4101 (standard)
PVC,CPVC,ASTM D-1784,PP,ASTM D-4101,PVDF, ASTM D-3222

 

Stem/Sleeve

Brass, 1/2" - 2",
C.I., 2 1/2" - 10"

 

Diaphragm

AEPDM, Ethylene Propylene Diene Monomer
Fluorocarbon, Viton® (DuPont Performance Elastomers) for vacuum service only
PTFE/EPDM, Teflon® (DuPont Performance Elastomers)

 

Diaphragm Insert Stud

Stainless Steel, Large Diameter

 

Positive Indicator Cover

PC, Polycarbonate, ASTM - D-2848

 

Handwheel

ABS, ASTM D-1788

 

Not recommended for compressed air or gas service.