Description
When pressure at port 2 or port 3 rises above the spring bias pressure, the poppet is pushed from its seat and flow is allowed from 2 to 1 or 3 to 4. The valve is normally closed (checked) from 1 to 2 and from 4 to 3. When sufficient pilot pressure is present at port 3 or port 2, the pilot piston acts to push the poppet from its seat and flow is allowed from 1 to 2 or from 4 to 3. Precision machining and hardening processes allow virtually leak-free performance in the checked condition.
¹) Only external seals for 10 valves
