Operating Principle
Inside the valve, a spring-loaded poppet remains closed until the system pressure exceeds the pre-set limit. Once this threshold is reached, the hydraulic force overcomes the spring tension, opening the valve and allowing excess fluid to flow through the return port (T), thereby relieving system pressure. As the pressure drops back below the set value, the spring closes the valve again, stopping the flow.
This open-close cycle keeps the system operating safely within the desired pressure range and protects critical components from damage.
