Ham-Let® H-911 Excess Flow Valves

The design of the Ham-Let® H-911 Valve has been tested for Proof and Burst. Every assembled valve is tested for proper functionality.

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 and (with the help of the spring) to reset the system. In this situation, the poppet reverts back to Normally Open.

Excellent for Automatic Safety Shutoff in a wide range of areas including:

  • Fuel systems
  • Toxic Media Systems
  • Gas Systems
  • Valued Media Systems
  • Hydraulic & Pneumatic Systems