Mark 958 Series
Cast, Medium to High Flow, Very Low Pressure
Inline style, cast back pressure regulating valves for medium - high flow, very low vent pressure gas regulation in stainless steel and single use disposable vessels for the Biopharmaceutical, Pharmaceutical, Food & Beverage and Consumer Health & Beauty industries.
- For regulated venting of medium to large stainless steel or single use disposable bioreactor/fermenter, sparge gas, purge/blanket/motive force gas
- Separation: for regulated venting of purge/blanket/motive force
- Purification: for regulated venting of purge/blanket/motive force gas
- Formulation: for regulated venting of purge/blanket/motive force gas
- For regulated venting of F & B Consumer, H & B process purge/blanket/motive force gas
Features & Benefits
- 360° body orientation on 3/4″ and 1″ sizes
- Robust design – emergency outlet pressure may reach 100% of inlet pressure without damaging valve
- Electropolishing standard
- Easy maintenance – seat and plug can be inspected without removing body from the line
- FDA-approved seals and diaphragms
- Tight shutoff – soft elastomer plug provides ANSI Class VI shutoff
- Completely self-operated – no external power source required
Specifications
- Sizes: 3/4″, 1″, 1-1/2″, 2″ (DN20, DN25, DN40, DN50)
- End Connections:
– Tri-clamp – ASME BPE or ISO/DIN
– Flanged – 150#, 300#, PN25/40 - Max Pressure/Temperature: Size dependent
- Set Point Range: 2.0 inch w.c. to 5 psi (5 mbar to 345 mbar)
- Diaphragm: Size dependent
- Wetted Material & Surface Finish: ASTM A351 CF8M (316SS) or CF3M (316L SS) internal and external cast body components are 130 Ra µin (3,30 Ra µm) minimum after electropolishing
- Body & Housing: SA 351 Gr. CF8M 316SS or CF3M 316L
- Seat & Plug: ASTM A479 316L (plug with FDA approved Viton)
- Shutoff: ANSI VI
Resources
PRV Gas Regulation Comparison Chart
Understanding the differences among pressure regulating blanketing valves
Approvals
- CRN (Canadian Registration Number)
- PED Category 1 (Pressure Equipment Directive)
- SEP Declaration (Sound Engineering Practice)
- All products use FDA and USP Class VI approved soft goods and seals where possible. Consult each product data for details
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