HPST-8 Series

• high pressure air operated
• pressure rating: 3500 psig
• flow coefficient: cv =.30
• seat orifice size: .156 diameter
• standard seat material: pctfe
• temperature limits PCTFE seat: -65f to 150f
• temperature limits optional polyimide seat: -65f to 250f
• max allowable seat leakage: 2 x 10-8 atm cc/sec he
• max inboard leakage: 2 x 10-8 atm cc/sec he
• wetted diaphragm: elgiloy

• forged body construction
• air operated actuation
• normally closed or normally open
• spring type design
• metal diaphragm sealed
• medium flow, high pressure
• positive shut-off
• ultrasonically di cleaned
• 100% helium leak tested

• electropolished id surface available on request
• custom materials and configurations available on request

Seat Material:

• pctfe
• polymide

End Connections:

• 1/2” male and 1/2” female pipe thread
• 3/8” and 1/2” tube socket weld
• 1/2” pipe socket weld
• 1/2 male and 1/2 female face seal
• 3/8” and 1/2” orbital tube weld
• custom connections

• 316l stainless steel