RAF 83B pressure sustaining valve is line pressure hydraulically actuated, 3-W pilot.
The RAF 83B maintains a minimum upstream pressure, as set on the 3-W pilot, regardless of flow changes.
The RAF 83B pressure sustaining valve will fully open should upstream pressure exceed 3-W pilot set pressure.
The 3-W pilot configuration together with Raphael’s patented diaphragm enable smooth and precise upstream pressure control.
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