ST-4 Type

Specifications:

•             ROUND HANDLE MANUAL

•             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: 316L SST

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

Features and Benefits

• SPRING TYPE DESIGN

• STANDARD FORGED BODY PIPE THREADED DESIGNS

   (AVAILABLE WITH PM OPTION)

• STANDARD BAR STOCK BODY FOR NON-PIPE THREADED DESIGNS

   (BOTTOM MOUNT STANDARD, AVAILABLE WITH PM OPTION)

• 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