Bosch Rexroth | FD32FB2X400B06V-082
FD32FB2X/400B06V-082
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The FD32FB2X/400B06V-082 check valve is produced by Bosch Rexroth for the FD Check Valves series and directs flow for hydraulic automation tasks. Its nominal size of 32 establishes the port geometry for compatible plumbing, while a maximum flow capacity of 560 l/min permits high-volume circuits. Forward flow from port a to port b begins when the cracking pressure reaches 2 bar, and reverse flow starts to open at 20 bar, securing the circuit against unintended backflow. An internal area ratio of 1:20 between the pilot chamber and load side governs the pre-opening behavior. Installation is completed with an SAE flange that includes a secondary relief valve, reducing external piping. Continuous service limits are 350 bar at ports a and x and 420 bar at port b, so the valve tolerates heavy-duty operating pressures.
The integrated pilot stage permits a relief setting up to 400 bar, giving the assembly its overpressure safeguard. A G1/4 control port accepts pilot lines, and a matching G1/4 measuring port allows pressure checks during maintenance. Pilot flow is metered by a 0.6 mm orifice to stabilize shifting under dynamic loads. Sealing is provided by a 37.69 × 3.53 mm O-ring made of FKM, a material selected for high-temperature mineral oils. System cleanliness must meet ISO 4406 class 20/18/15 to protect the precision seats. The design operates with mineral oil fluids in the HL or HLP categories, aligning the valve with common hydraulic reservoirs in industrial and mobile equipment.
Technical Specifications
Area Ratio (pre-open:load)
1:20
Begin Opening Pressure (b→a)
20 bar
Cleanliness Level (iso 4406)
20/18/15
Connection Type
SAE Flange (With Sec. Relief Valve)
Control Port Thread
G1/4
Cracking Pressure (a→b)
2 bar
Hydraulic Fluid
Mineral Oil (HL, HLP)
Max Flow (size 32)
560 l/min
Max Operating Pressure (a,x)
350 bar
Max Operating Pressure (b)
420 bar
Max Relief Pressure Setting
400 bar
Measuring Port Thread
G1/4
Nominal Size
32
O-ring Size
37.69 × 3.53 mm
Orifice Diameter
0.6 mm
Sealing Material
FKM
1620 Old Apex Road
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