HPST-4 Series

Specifications:

• HIGH PRESSURE AIR OPERATED

• ACTUATION PRESSURE: 70 - 125 PSIG

• PRESSURE RATING: 3500 PSIG

• FLOW COEFFICIENT: Cv =.26

• SEAT ORIFICE SIZE: .125 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

• STANDARD BOTTOM MOUNT: 2 x #10-32  TAPPED HOLES ON A 1” BOLT CIRCLE

Features and Benefits

• SPRING TYPE DESIGN

• AIR OPERATED ACTUATION

• NORMALLY CLOSED OR NORMALLY OPEN

• STANDARD FORGED BODY PIPE THREADED DESIGNS

• STANDARD BAR STOCK BODY FOR NON-PIPE THREADED DESIGNS

   (BOTTOM MOUNT STANDARD)

• POSITIVE SHUT-OFF

• CLEANED FOR OXYGEN SERVICE

• 100% HELIUM LEAK TESTED

Additional Configuration Options

• ELECTROPOLISHED ID SURFACE AVAILABLE ON REQUEST

• CUSTOM MATERIALS AND CONFIGURATIONS AVAILABLE ON REQUEST