Bosch Rexroth | FD25PA2XB00V
FD25PA2X/B00V
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The FD25PA2X/B00V check valve belongs to the FD Check Valves series produced by Bosch Rexroth for hydraulic automation circuits. It supports a maximum flow of 320 l/min, allowing it to handle medium-to-high capacity lines. A cracking pressure of 2 bar lets the valve open with minimal upstream pressure to reduce energy loss. Port diameters of 22 mm align with the porting pattern ISO 5781-08-10-0-00 for straightforward manifold integration. An area ratio of 1:20 between the control and load chambers enables effective pilot actuation when back-pressure release is needed. The valve endures 350 bar at ports a and x, matching high-pressure supply channels, and the dedicated control port is threaded G 1/4 under ISO 228/1 for common fittings. Sub-plate mounting simplifies replacement in stacked valve banks and shortens downtime during service.
The valve tolerates 420 bar at port B, giving extra safety margin on the load side. Because the model carries the B00 designation, no internal orifice is fitted, allowing unrestricted pilot flow for rapid response. Seal integrity is maintained by a 29.82 × 2.62 mm O-ring made from FKM, chosen for heat and oil resistance. Four M10 × 120 screws to DIN 912-10.9 secure the body, and each screw requires 75 Nm of torque to hold the assembly against pressure cycling; the 10.9 strength classification of these fasteners resists elongation when the body is subjected to thermal expansion. The recommended medium is mineral oil in HL or HLP classes according to DIN 51524 to ensure compatibility with internal surfaces. The valve weighs 18 kg, so lifting provisions may be needed when installing it in confined cabinets.
Technical Specifications
Area Ratio (control:load)
1:20
Control Port Thread
G 1/4 (ISO 228/1)
Cracking Pressure (a To B)
2 bar
Fixing Screws
4x M10x120 DIN 912-10.9
Hydraulic Fluid
Mineral oil (HL, HLP) per DIN 51524
Max Operating Pressure (a,x)
350 bar
Max Operating Pressure (b)
420 bar
Maximum Flow
320 l/min
Mounting Type
Sub-plate mounting
O-ring Size
29.82 x 2.62
Orifice
None (B00)
Port Diameter (a,b)
22 mm
Porting Pattern
ISO 5781-08-10-0-00
Sealing Material
FKM (V)
Tightening Torque (fixing Screws)
75 Nm
Weight
18 kg
1620 Old Apex Road
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