PR58-38A-0-U-20/ REDUCE/RELIEVE

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The Hydraforce PR58-38A-0-U-20 (5606451U) is a screw-in, cartridge-style, direct-acting spool type hydraulic pressure reducing/relieving valve. It features an internal spring chamber drain and a spool damping chamber. Designed for secondary circuit pressure regulation, the valve allows bidirectional flow from port 2 to port 1 in its steady state while maintaining a constant drain at port 3. When the predetermined pressure at port 1 is reached, the valve shifts to block flow at port 2 and regulates pressure at port 1, with the capability to relieve pressure from port 1 to port 3. The PR58-38A-0-U-20 can be equipped with an optional 60 x 60 mesh screen for protection at port 2 and offers adjustable spring ranges up to 248 bar (4200 psi), ensuring operational flexibility. The valve is built with a hardened spool and cage for durability and comes in a compact industry-common size. Its maximum pressure ratings include a working pressure of up to 344.7 bar (5000 psi), proof pressure of 379.2 bar (5500 psi), and burst pressure of up to 896.3 bar (13000 psi). It supports flow rates up to 18.9 lpm (5 gpm) and operates effectively within fluid temperature ranges depending on seal material, offering versatility across different environments: -40\u00b0C to +100\u00b0C with Buna N seals, -26\u00b0C to +204\u00b0C with fluorocarbon seals, and -54\u00b0C to +107\u00b0C with polyurethane seals. The valve accommodates fluids ranging from mineral-based or synthetic oils with lubricating properties within a viscosity range of 7.4 to 420 cSt and maintains an acceptable contamination level per ISO standards. Installation requires adherence to specified torque values for both cartridge installation and plug torque without orientation restrictions, ensuring ease of integration into existing hydraulic systems.