Bosch Rexroth | ZSF125F0-1-2XM01
ZSF125F0-1-2X/M/01
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The ZSF125F0-1-2X/M/01 prefill valve belongs to the ZSF Prefill Valves series and is manufactured by Bosch Rexroth for hydraulic automation where large cylinder volumes must be charged and emptied quickly. The valve is supplied in nominal size 125, enabling high flow rates during each press cycle. A flange connection simplifies integration into a manifold block without external adapters. Because the installation position can be any orientation, the body may be mounted vertically or horizontally to suit space constraints. The main poppet travels 30.0 mm to open a wide passage for rapid fluid transfer, while a 22.5 mm control spool stroke defines the actuation movement required to shift the valve. Permitted oil viscosity extends from 10 to 800 mm²/s, allowing operation with a broad range of hydraulic fluids. The housing weighs 26 kg, so the surrounding structure must provide adequate mechanical support.
Port ratings and interface data govern the operating limits of the valve. Port B/p withstands 350 bar, making it suitable for the high-pressure supply path, whereas Port A is limited to 16 bar and therefore serves the low-pressure return side. Port X carries a maximum of 150 bar to handle pilot control pressure safely. A G1 thread to ISO 228-1 is provided on Port P for straightforward connection to standard pressure lines, while Port X is machined with a G3/8 thread to the same standard for common pilot hoses. Acceptable hydraulic fluid temperature ranges from −30 °C to +70 °C, allowing cold-start and normal running conditions. Required oil cleanliness is ISO 4406 20/18/15 to prevent contamination-related wear of the poppet and spool. NBR seals are used to contain mineral oil and maintain leak-tight performance under the stated pressure and temperature limits.
Technical Specifications
Connection Type
Flange
Control Spool Stroke
22.5 mm
Fluid Cleanliness
ISO 4406 (c) 20/18/15
Hydraulic Fluid Temperature Range
−30 to +70 °C
Installation Position
Any
Main Poppet Stroke
30.0 mm
Nominal Size
125 (NG125)
Port A Max Pressure
16 bar
Port B/p Max Pressure
350 bar
Port P Thread
G1 (ISO 228-1)
Port X Max Pressure
150 bar
Port X Thread
G3/8 (ISO 228-1)
Seal Material
NBR
Viscosity Range
10 to 800 mm²/s
Weight
26 kg
1620 Old Apex Road
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