Bosch Rexroth | SF40A0-1-1X12
SF40A0-1-1X//12
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The SF40A0-1-1X//12 valve belongs to the SF Prefill Valves series and is produced by Bosch Rexroth. It is a hydraulically released check valve used to admit or block flow during rapid cylinder movement in hydraulic automation. The nominal size is 40, providing a defined flow path that matches associated pipework. A flange connection in version A secures the housing to the circuit, while pilot control is applied through port X to release the poppet. A separate drain port Y channels internal leakage, and the unit can be mounted in any orientation to ease system layout. The model is supplied without a position switch, so no electrical confirmation of poppet position is available.
The valve handles a maximum operating pressure of 350 bar at ports b, x, and y, whereas port A is restricted to 16 bar to protect the prefill passage. Sealing elements are made of NBR to maintain tightness under the specified pressure range. Acceptable hydraulic fluids are HL, HLP, HVLP, and HFC, letting the designer select among common mineral-oil or synthetic options. All threaded auxiliary connections follow ISO 228-1 to ensure compatibility with standard fittings. The design is supplied without pre-decompression, coded as 0, meaning the poppet opens directly when pilot pressure is applied.
Technical Specifications
Connection Type
Flange (A)
Drain Port
Y
Hydraulic Fluids
HL, HLP, HVLP, HFC
Max Operating Pressure (b,x,y)
350 bar
Max Pressure Port A
16 bar
Mounting Orientation
Any
Nominal Size
40
Pilot Port
X
Position Switch
None
Pre-decompression
Without (0)
Seal Material
NBR
Thread Standard
ISO 228-1
Valve Type
Hydraulically Released Check Valve
1620 Old Apex Road
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