Atos HR-012 modular pilot-operated check valve

HR-012 is an Atos modular pilot-operated check valve. This pilot-operated poppet check valve acts on ports A and B. It allows forward flow and blocks reverse flow. Hydraulic pilot pressure opens the check function; the standard pilot area ratio is 3.3:1.

The standard HR model is rated for a maximum operating pressure of 350 bar and a maximum flow of 60 L/min. It uses nominal size 6 and an ISO 4401-03-02-0-05 mounting interface for integration into a modular hydraulic valve stack.

Atos specifies a standard spring cracking pressure of 0.5 bar. Optional spring and seal executions are separate from this published standard designation.