MARK958 Pressure-Holding Valve

MARK 958 is a sanitary gas back-pressure regulator for pharmaceutical applications and food applications. The large diaphragm and handle activation gives the MARK958 a greater sensitivity compared to smaller diaphragm pressure regulators, which is important as the MARK958 often operates at very low pressures. This particular actuation improves valve accuracy and shut-off - two important benefits for this type of regulator. Thanks to the SST design, the FDA-approved gaskets and the triclamp connections, this valve is particularly suitable for sanitary applications and environments. MARK 958 is the ideal valve for blanketing tasks for tanks.
  • Greater sensitivity compared to smaller diaphragm pressure regulators
  • Works at very low pressures
  • Improved accuracy and shut-off
  • SST construction
  • FDA approved gaskets
  • Triclamp
  • Particularly suitable for sanitary applications and environments
  • Ideal for blanketing tasks for tanks
Product Number:STERIFLOW_MARK958

Steriflow Valve is a leading manufacturer and supplier of, among other things, pressure regulators, control valves and steam traps.

Steriflow has been producing valves for the pharmaceutical industry all over the world since 1988 and has a wide range of valve types for many tasks with regulation of WFI, clean steam, gases, etc.
Max pressure
10 bar
Min. pressure
0 bar
Surface roughness
Down to Ra <0.4 µm
DN20 - DN25


This pressure-holding valve can be delivered with a documentation package that i.a. contains the following certificates. Feel free to contact us if you have any questions.

USP Class VI

Do you have any questions or do you need help finding the right component?

The pressure-holding valve from Steriflow Valves is available in several different sizes. Feel free to contact us for help in choosing the right pressure-holding valve.
Rasmus Lundby
Technical Manager
Malene Junker
Internal Technical Sales

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Jens Christian Jeppe