Bosch Rexroth | SF50A1-1-1X12
SF50A1-1-1X//12
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The SF50A1-1-1X//12 valve is manufactured by Bosch Rexroth for the SF Prefill Valves series and is intended for hydraulic automation circuits where rapid filling and secure shut-off are required. Actuation is hydraulic, so internal movement relies solely on system pressure. The unit is a pilot-operated check valve that allows flow in one direction and blocks reverse flow until pilot pressure releases it. A nominal size of 50 supports high flow rates needed in large installations, while a maximum operating pressure of 350 bar permits use in high-pressure lines. The body attaches with a flange type A connection that eliminates threaded adapters, and it can be installed in any position to suit various mounting layouts.
Pre-decompression is provided to open the valve gradually and limit pressure surges during start-up. NBR sealing material maintains leak-tight operation with standard mineral oils. Acceptable fluid temperatures range from −30 °C to +80 °C, so the valve functions in both cold and elevated ambient conditions. The design includes no position switch, which removes the need for electrical feedback devices in the manifold. A weight of 14.48 kg must be supported by the surrounding structure during installation and service.
Technical Specifications
Actuation Type
Hydraulic
Connection Type
Flange (A)
Fluid Temperature Max
+80 °C
Fluid Temperature Min
-30 °C
Installation Position
Any
Max Operating Pressure (b/x/y)
350 bar
Nominal Size
50
Position Switch
None
Pre-decompression
Yes
Seal Material
NBR
Valve Type
Pilot-Operated Check Valve
Weight
14.48 kg
1620 Old Apex Road
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