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UHP Stainless Steel Tied-Diaphragm Valve (up to 300 psig) - 935 Series
Brand: Parker HannifinThe 935 Series Tied-diaphragm Valve (1/2 inch) is intended for use in ultra-high purity gas distribution systems.
It provides superior control of gases under high-flow, low-pressure conditions, where high leak integrity and absolute purity is essential.
Specifications
Brand
Bake-Out Temperature (°C)
- 121° C (PCTFE), 177° C (Vespel)
Bake-Out Temperature (°F)
- 250° F (PCTFE), 350° F (Vespel)
Body Material
- VeriClean 316L Stainless Steel
Burst Pressure (bar)
- 62
Burst Pressure (psi)
- 900
Diaphragm Material
- 316L Stainless Steel
External Leak Rate
- ≤ 2 x 10-10 Scc/sec He
Flow Capacity (Cv)
- 2.8
Internal Leak Rate
- ≤ 4 x 10-9 Scc/sec He
Internal Volume (cc)
- 16.2 cc
Knob Material
- Aluminum (Blue)
Maximum Inlet Pressure (barg)
- 21 barg
Maximum Inlet Pressure (psig)
- 300 psig
Maximum Working Temperature (°C)
- 66° C (PCTFE), 177° C (Vespel)
Maximum Working Temperature (°F)
- 150° F PCTFE, 350° F (Vespel)
Minimum Working Temperature (°C)
- -40° C
Minimum Working Temperature (°F)
- -40° F
Seat Material
- PCTFE (Standard), Vespel
Stem Bushing Material
- Aluminum Silicon Bronze
Stem Material
- 416 Stainless Steel
Surface Finish (Ra)
- 10 Micro inch Ra (Standard)