Mark 968 Series - Gas Pressure Regulator

Self-Contained Low Pressure Gas Regulator - Mark 968 Series

The Mark 968 is normally open. Increases in the outlet pressure are sensed through the aspirator causing the large elastomer diaphragm to rise, which moves the plug toward the seat. As outlet pressure decreases, the diaphragm moves down and moves the plug away from the seat to increase flow. The lever, which connects the stem to the diaphragm, amplifies diaphragm forces for tighter shutoff (3/4” and 1”). The large diaphragm and lever actuation allows the Mark 968 to act with higher sensitivity compared to smaller diaphragm pressure regulators. High sensitivity is important, as the Mark 968 often works with very low pressure (down to 1” w.c. or 2,5 mbar). This special actuation improves the accuracy and shutoff of the valve – two important benefits in this style of regulator. Together, the SST construction, FDA-approved seals and the tri-clamp connections make this valve well suited for sterile applications and environments.

Inlet pressure up to 150 psi (10 bar)
Robust design – emergency outlet pressure may reach 100% of inlet pressure without damaging valve
360° body orientation – valve can be installed in any position, and can be easily repositioned while in-line
Easy maintenance – seat and plug can be inspected witout removing body from the line
Completely self-operated – no external power source required
Tight shutoff – soft elastomer lug provides ANSI Class VI shutoff
316/316L SST body/trim and tri-clamp, quick disconnect clamp connection
FDA-approved seals and diaphragms
Optional electropolishing available