Bosch Rexroth | ZSF80F1-1-1XM12
ZSF80F1-1-1X/M12
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The ZSF80F1-1-1X/M12 prefill valve belongs to the ZSF Prefill Valves series and is manufactured by Bosch Rexroth for use in hydraulic automation where fast cylinder charging and discharging are required. The valve carries a nominal size of 80, so it can handle large flow volumes through its flange connection. It weighs 10 kg, which affects installation planning and support brackets. Port B tolerates a maximum operating pressure of 350 bar, while port A is limited to 16 bar for the return path to tank. Hydraulic oils with viscosities from 10 to 800 mm²/s can be used, and system contamination must not exceed ISO 4406 (c) 20/18/15 to protect the seating surfaces.
Port X is reserved for pilot control up to 150 bar, and both pilot and pressure ports use UNF/UN threads to match common hose fittings. A G 1/4 measuring port allows pressure checks, and its plug should be tightened to 30 Nm to prevent leaks. The housing is fixed to the manifold with eight M20 x 140 screws, and each screw requires 460 Nm of tightening torque to maintain clamping force on the NBR seals. These seals, combined with a hydraulic fluid temperature window of −30 to +70 °C, give reliable service across cold-start and full-load conditions.
Technical Specifications
Cleanliness Class
ISO 4406 (c) 20/18/15
Hydraulic Fluid Temp Range
-30 to +70 °C
Max Operating Pressure (port A)
16 bar
Max Operating Pressure (port B,p)
350 bar
Max Operating Pressure (port X)
150 bar
Measuring Port Thread
G 1/4
Measuring Port Torque
30 Nm
Mounting Screws
8x M20 x 140
Nominal Size (ng)
80
Port Thread Type (p, X)
UNF/UN
Screw Tightening Torque
460 Nm
Seal Material
NBR
Type Of Connection
Flange
Viscosity Range
10 to 800 mm²/s
Weight
10 kg
1620 Old Apex Road
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