Pilot Operated, Spool Type, Relief Valve.
Operation
The adjustable spring-loaded ball in the pilot section is shifted at valve setting by pressure sensed through an orifice in the main spool from port [2]. The resulting pilot flow creates a pressure drop across the spring-loaded main spool that then opens allowing relief flow to port [1].
Reverse flow [1] to [2], is blocked. Back pressure on port [1] adds to the valve setting.
Pilot Operated, Spool Type, Relief Valve.
Operation
The adjustable spring-loaded ball in the pilot section is shifted at valve setting by pressure sensed through an orifice in the main spool from port [2]. The resulting pilot flow creates a pressure drop across the spring-loaded main spool that then opens allowing relief flow to port [1].
Reverse flow [1] to [2], is blocked. Back pressure on port [1] adds to the valve setting.