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Fluid Solutions Products

Excess Flow Valves - H911

The poppet is loaded by a spring in a normally open position, as long as the system is balanced. If the system becomes unbalanced and the downstream pressure drops, the poppet moves towards the sealing area and prevents free, uncontrolled excess flow from the line. If the downstream pressure increases, the ventilation outlet ("bleeding") enables the system to balance the pressures (with the help of the spring) and reset the system. In this situation, the poppet reverts back to Normally Open.

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