Pressure reducing-relieving valves are designed to reduce and maintain a preset pressure in specific branches of a hydraulic system, as well as to protect system components from exceeding the allowable pressure. They combine the functions of a pressure reducing valve and a pressure relief valve, ensuring stable system operation, equipment safety, and protection of actuators against overloads.
Such valves are widely used in industrial equipment, mobile and heavy machinery, presses, machine tools, lifting equipment, as well as construction and agricultural machinery, where different pressure levels must be maintained in separate circuits and reliable hydraulic system protection is required.
Pressure reducing/relief valves are available in subplate-mounted versions for installation on standard mounting plates, as well as in cartridge designs for direct integration into hydraulic manifolds. This provides flexibility in hydraulic system design, compact construction, and ease of installation. Cartridge valves reduce the number of connections and pressure losses, while subplate-mounted valves simplify maintenance and component replacement.
Pressure reducing-relieving valves are designed for maximum pressures of up to 420 bar and maximum flow rates of up to 320 l/min, ensuring reliable, durable, and safe operation under demanding operating conditions.

SUN Hydraulics pressure reducing/relief valves are used to reduce and maintain preset pressure in selected hydraulic circuits while protecting components from overpressure. They are rated for pressures up to 350 bar and flow rates up to 320 l/min.

Argo-Hytos pressure reducing-relieving valves reduce and maintain preset pressure in selected hydraulic circuits while protecting components from overpressure. They ensure safe and stable operation at pressures up to 420 bar and flows up to 150 l/min