Bosch Rexroth | FD12KA2XB00V12
FD12KA2X/B00V12
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The FD12KA2X/B00V12 valve belongs to the FD Check Valves series and is produced by Bosch Rexroth for manifold-mounted hydraulic automation. It is supplied as a cartridge design so it seats directly in a block without external pipework. The nominal size NG12 supports medium-frame circuits and, because no orifice is machined in version B00, the flow path remains unobstructed. An FKM seal is fitted to resist mineral oil exposure and elevated service temperatures. A control port threaded G 1/4 allows an external pilot line to influence internal poppet movement. Cracking pressure from port A to port B is fixed at 2 bar, letting the valve open with a modest upstream differential, while the reverse opening from port B to port A through port X requires 20 bar to prevent unwanted backflow. These features let designers assign separate pressure thresholds for forward and reverse movement inside compact manifolds.
The unit handles 350 bar on ports A and X and 420 bar on port B, giving it the strength needed for high-pressure actuators. Maximum flow is 80 l/min, so the valve can serve medium-capacity pumps without excessive pressure drop. It is intended for mineral oils classified HL or HLP according to DIN 51524, and it remains functional with viscosities between 10 mm²/s and 800 mm²/s. Acceptable fluid temperature spans from −20 °C to +80 °C, matching the range typically seen in mobile and industrial hydraulics. Cleanliness must not exceed ISO 4406(c) 20/18/15 to preserve poppet seating integrity and extend service life. These operating limits define the conditions in which the FD12KA2X/B00V12 can provide reliable one-way flow control in demanding hydraulic machinery.
Technical Specifications
Cleanliness Level
ISO 4406(c) 20/18/15
Control Port Thread
G 1/4
Cracking Pressure A→b
2 bar
Design
Manifold Mounting (Cartridge)
Hydraulic Fluid
Mineral Oil (HL, HLP) DIN 51524
Hydraulic Fluid Temp Max
+80 °C
Hydraulic Fluid Temp Min
−20 °C
Max Flow
80 l/min
Max Operating Pressure (a,x)
350 bar
Max Operating Pressure (b)
420 bar
Opening Pressure B→a (port X)
20 bar
Orifice
None (B00)
Sealing Material
FKM
Size
NG12
Viscosity Max
800 mm²/s
Viscosity Min
10 mm²/s
1620 Old Apex Road
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