ZSF32F1-1-1X/M/12

The ZSF32F1-1-1X/M/12 valve belongs to the ZSF Prefill Valves series and is manufactured by Bosch Rexroth for use in hydraulic automation where quick cylinder filling is required. Its nominal size of 32 determines the flow area available for rapid transfer of fluid between a reservoir and a working chamber. A nozzle diameter of 0.8 mm meters the pilot flow so the main poppet opens and closes smoothly under varying load conditions. The valve tolerates a maximum operating pressure of 350 bar on the main ports, allowing it to work in high-pressure systems without structural deformation. Control port X can be pressurized up to 150 bar, providing a defined pilot signal that shifts the poppet reliably. Port A is limited to 16 bar, protecting downstream return lines from excessive back-pressure. Both port P and port X use 3/4-16 UNF threads, which match common tube fittings and support straightforward installation. Because the installation position can be any orientation, machine designers have flexibility when routing piping and planning manifold layouts.

The valve accepts hydraulic fluids with viscosities between 10 and 800 mm²/s, so it remains functional from start-up when oil is cold to full-temperature operation. Maximum fluid temperature is 70 °C, while the assembly can endure ambient temperatures up to 80 °C; these limits preserve elastomer integrity and prevent thermal expansion from affecting clearances. An ISO 4406 cleanliness class of 20/18/15 is required to prevent particulate scoring of the poppet and seat. The sealing elements are made from NBR, giving compatibility with standard mineral-based oils used in industrial power units. The valve weighs 3.5 kg, light enough for single-person handling during maintenance or replacement. Together, these characteristics define the environmental boundaries and service conditions under which the ZSF32F1-1-1X/M/12 maintains reliable prefill and exhaust functions in hydraulic cylinders.