Bosch Rexroth | FD16FB2X300B03V
FD16FB2X/300B03V
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The FD16FB2X/300B03V check valve belongs to the FD Check Valves series produced by Bosch Rexroth for directional control in hydraulic automation circuits. It employs an area ratio of 1:20 so the pilot port can open the poppet with relatively low pressure. The cracking pressure from port A to B is 2 bar, which defines the minimum differential needed to begin flow in the forward direction. A nominal size of 16 supports line sizes common to medium-capacity machinery, and a maximum flow of 200 l/min permits steady operation in power units and actuators of that scale. The control port uses a G1/4 thread, allowing straightforward connection to standard metric fittings, while the control port withstands up to 350 bar to accommodate typical pilot lines. Mineral oil in classes HL or HLP is the specified hydraulic fluid, and an internal orifice of 0.3 mm meters pilot flow to prevent pressure spikes.
Port A and the pilot passage tolerate continuous service at 350 bar, whereas port B is rated for 420 bar so reverse-side pressure surges do not damage the seat. A secondary relief path is limited to 300 bar, giving the circuit designer a defined threshold for over-pressure events. The valve functions within a fluid temperature window of −20 °C to 80 °C, which covers cold-start and warmed-up oil conditions in mobile and stationary equipment. Cleanliness must meet ISO 4406 20/18/15 to keep the poppet sealing edge free of abrasive particles. An FKM seal resists mineral oil and elevated temperatures, reducing service intervals in demanding installations. The assembly weighs 9 kg, a mass suitable for manifold mounting without extra support.
Technical Specifications
Area Ratio
1:20
Cleanliness Class
ISO 4406 20/18/15
Control Port Thread
G1/4
Control Pressure Max
350 bar
Cracking Pressure A To B
2 bar
Hydraulic Fluid
Mineral Oil (HL, HLP)
Hydraulic Fluid Temp Max
80 °C
Hydraulic Fluid Temp Min
-20 °C
Max Flow
200 l/min
Nominal Size
16
Operating Pressure Port A,x
350 bar
Operating Pressure Port B
420 bar
Orifice Diameter
0.3 mm
Sealing Material
FKM
Secondary Relief Pressure Max
300 bar
Weight
9 kg
1620 Old Apex Road
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