Bosch Rexroth | FD32FA2XB00V
FD32FA2X/B00V
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The FD32FA2X/B00V check valve belongs to the FD Check Valves series from Bosch Rexroth and permits one-way flow in hydraulic automation circuits. The nominal size of 32 establishes the flow passage dimension for medium-to-high flow installations. Its SAE flange design without a relief valve simplifies mounting on manifold plates where external pressure limiting is provided. An area ratio of 1:20 between control and load surfaces allows small pilot pressures to hold the main poppet closed. The control and measuring port is threaded G 1/4, enabling easy connection of pilot lines or pressure gauges. Maximum operating pressure reaches 350 bar at ports A and X, supporting high-pressure supply lines, while port B is rated for 420 bar to withstand downstream surges. The valve accommodates flows up to 560 l/min from port A to B, making it suitable for large displacement actuators.
A cracking pressure of 2 bar in the a-to-b direction ensures the valve opens promptly when upstream pressure rises slightly above load pressure. In the reverse b-to-a direction a minimum opening pressure of 20 bar prevents unintended backflow until a defined pilot signal is supplied. The sealing interface uses an O-ring measuring 37.69 × 3.53 mm to maintain leak-free installation on the flange face. FKM is selected as the sealing material to provide chemical resistance against common hydraulic oils and elevated temperatures. Approved hydraulic fluids include mineral oil types HL and HLP according to DIN 51524, aligning the valve with standard power units. Required fluid cleanliness is ISO 4406 class 20/18/15, which limits particulate contamination that could damage the seat surface. There is no internal orifice, so flow is unrestricted once the poppet is released. The assembly weighs 21 kg, a factor to consider for supporting brackets during machine design.
Technical Specifications
Area Ratio (control:load)
1:20
Control/measuring Port Thread
G 1/4
Cracking Pressure (a→b)
2 bar
Design
SAE Flange, No Relief Valve
Fluid Cleanliness
ISO 4406 20/18/15
Hydraulic Fluid
Mineral Oil (HL, HLP) (DIN 51524)
Max Control Pressure (port X)
350 bar
Max Operating Pressure (port A/x)
350 bar
Max Operating Pressure (port B)
420 bar
Maximum Flow (port A/b)
560 l/min
Min Opening Pressure (b→a)
20 bar
Nominal Size
32
O-ring Size
37.69 × 3.53 mm
Orifice
None
Sealing Material
FKM
Weight
21 kg
1620 Old Apex Road
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