Pressure Relief valves are used to limit the pressure in the system as set on the valve. Direct Relief Valves are applicable in systems where quick pressure release is of prime concern for safety. This is an economical solution for systems having small flows. The valve is a zero leak valve due to the metal sealing of the poppet on the seat. The DR06 can also be used for pilot systems.
Unloading valves are used to unload the pump to tank when the pressure in a separate part of the circuit reaches a pre-set level. The most common application is to maintain pressure in an accumulator which may be used in an emergency to operate an essential hydraulic function.
Throttle valves can be used where volume flows have to be infinitely controlled in both directions without taking pressure fluctuations into account. The line mounted design with BSP ports is ideal for installing in-line for power packs or hydraulics circuits.