The Ham-Let® H-400 General Purpose Check Valve Series is a compact design for instrumentation panels and systems, which provides an accurate operating point.
H-400 check valves are normally closed.
When differential pressure between inlet and outlet is higher than the set pressure of the spring, the loaded poppet will move backwards and will enable free passage of flow through the valve
Cracking Pressure
- The differential pressure between inlet and outlet, at which an initial flow is passing through the valve.
Reseal Pressure
- The differential pressure between outlet and inlet, at which no flow is passing through the valve.
Back Pressure
- Maximum allowable back pressure is rated to 1000 psi for 1/4, 200 psi for 3/8 to 1". For high back pressure please select valve from the H-400HP Series.
Testing:
- The H-400 Check Valve designs have been tested for Proof and Burst.
- Every H-400 check valve is factory tested for proper assembly, by leakage detection at 1000 psig for 10 seconds.
- Every H-400 general purpose check valve is factory tested for functionality at the relevant cracking pressure, 5 cycles each.