Bosch Rexroth | ZSF100F1-1-1XM01
ZSF100F1-1-1X/M/01
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The ZSF100F1-1-1X/M/01 prefill valve belongs to the ZSF Prefill Valves series from Bosch Rexroth and is used to admit large oil volumes into hydraulic cylinders before high-pressure pumping begins. A flange connection forms the mounting interface so the valve can be bolted directly to the cylinder block or manifold. Nominal size 100 defines a flow cross-section suited to very high filling rates. The main poppet has an effective area of 73.13 cm², providing substantial forward flow when the cylinder is vented. A control spool area of 15.90 cm² sets the force needed to hold the poppet closed under pressure, while a 3.80 cm² pilot poppet area governs the initial opening response. Pilot flow passes through a 1.0 mm nozzle that meters the opening speed and prevents pressure shocks. The pilot port uses a G3/8 thread, and the main pilot supply employs a G1 thread, both cut to ISO 228-1 for compatibility with standard fittings. Fluid cleanliness must be maintained at ISO 4406 20/18/15 to protect the precision sealing edges.
The valve withstands up to 350 bar at ports b and p, allowing use in heavy press circuits, while the control port tolerates 150 bar so lighter pilot components can be selected. Port A is limited to 16 bar to avoid cavitation during rapid exhaust. Opening the valve requires a pilot volume of 25.5 cm³, which guides designers when sizing control lines and accumulators. NBR seals are fitted to resist common mineral oils and to simplify replacement schedules. The assembly weighs 15 kg, light enough for one-person handling yet heavy enough to stay rigid under shock loads. These pressure limits, fluid volume figures, and material details define how the ZSF100F1-1-1X/M/01 integrates into hydraulic presses and other automation systems that depend on fast, reliable prefill functions.
Technical Specifications
Cleanliness Class
ISO 4406 20/18/15
Connection Type
Flange Connection
Control Port Thread (x)
G3/8
Effective Area, Control Spool
15.90 cm²
Effective Area, Main Poppet
73.13 cm²
Effective Area, Pilot Poppet
3.80 cm²
Max Operating Pressure (b,p)
350 bar
Max Operating Pressure (x)
150 bar
Max Pressure At Port A
16 bar
Nominal Size
100
Nozzle Diameter
1.0 mm
Pilot Volume For Opening
25.5 cm³
Port Thread (p)
G1
Port Thread Standard
ISO 228-1
Seal Material
NBR
Weight
15 kg
1620 Old Apex Road
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