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UHP Diaphragm Valve - Manual or Air-Actuated (Vacuum to 250 psig) - 955 Series

Brand: Parker Hannifin

The 955 Series Diaphragm Valve is available with a variety of manual operators and air-operated actuators. 

The Series provides excellent reliability, leak integrity, and cleanliness making it ideal for use in UHP semiconductor applications.

Specifications

Actuation Pressure

  • 75 psig (5 barg) Nominal

Air Inlet Size

  • 1/8” NPT

Body Material

  • VeriClean 316L Stainless Steel

Burst Pressure

  • 750 psig (52 barg)

Cap Material

  • 17-4 Stainless Steel

Diaphragm Material

  • Elgiloy, Equivalent

External Leak Rate

  • ≤ 2 x 10-10 Scc/sec He

Flow Capacity (Cv)

  • Cv 0.55

Housing Material

  • Anodized Aluminum

Internal Leak Rate

  • ≤ 4 x 10-9 Scc/sec He

Internal Volume (cc)

  • 3.29 cc (Including Face Seal Fittings)

Maximum Inlet Pressure (barg)

  • 8.62 barg (AOPLPNO, G)17.22 barg (AOPLPNC, I, L, M)

Maximum Inlet Pressure (psig)

  • 125 psig (AOPLPNO, G)250 psig (AOPLPNC, I, L, M)

Maximum Working Temperature (°C)

  • 66° C

Maximum Working Temperature (°F)

  • 150° F

Minimum Working Temperature (°C)

  • -40° C

Minimum Working Temperature (°F)

  • -40° F

Nut Material

  • 316L Stainless Steel

Proof Pressure

  • 375 psig (26 barg)

Seat Material

  • PCTFE (Standard), PEEK, Vespel

Surface Finish (Ra)

  • 5 Micro inch Ra

Weight (kg)

  • 0.36

Weight (Lbs)

  • 0.81

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