From A$ 397.10

The pressure relief valve DB10-01 is a direct-acting, spring-loaded poppet valve.

Its function is to relieve pressure in the system. The spring exerts a force on the poppet and presses it on the valve seat. On the opposite side, the system pressure exerts force on port 1 of the valve. If the hydraulic pressure is below the pre-set spring tension, the valve is closed. Only if the hydraulic force exceeds the pre-set spring tension does the valve open and flow is diverted to tank via port 2.

This continues until the system pressure is equal to the spring tension and the valve closes again.

Important: Pressures at port 2 are additive to the opening pressure! To ensure that stable operation is maintained, the poppet has a damping piston which produces a damping force, opposing the direction of movement, and this has a stabilizing effect.

Please see below part numbers

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