Description
When pressure at 1 rises above the spring bias pressure, the poppet is lifted and flow allowed from 1 to 2. The valve is closed (checked) from 2 to 1. If the pressure at 2 increases to meet the thermal relief valve setting, a small amount of oil is allowed from 2 to 1, preventing damage from increasing pressure. Precision machining and hardening processes allow virtually leak-free performance in the checked condition.
¹) Only external seals for 10 valves
