The H-400 Series is a compact design for instrumentation panels and systems, which provides an accurate operating point. H-400 valves are normally closed. When differential pressure between the inlet and outlet is higher than the set pressure of the spring, the loaded poppet will move backwards and will enable a free passage of flow through the valve.

For vacuum applications please select H-400HP series.

Maximum allowable back pressure is rated to 1000 psi (69 bar) for 1/4,200 psi (14 bar) for 3/8 to 1". For higher back pressure please select valve from the H-400HP Series.

The system designer and user have the sole responsibility for selecting products suitable for their special application requirements, ensuring their safe and trouble-free installation, operation, and maintenance. Application details, material compatibility and product ratings should all be considered for each selected product. Improper selection, installation or use of products can cause property damage or personal injury.