Bosch Rexroth | LFA40H2-7XF
LFA40H2-7X/F
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The LFA40H2-7X/F control cover belongs to the LFA 2 Way Control Covers series and is manufactured by Bosch Rexroth. It is intended to perform two-way hydraulic flow control in automated manifolds. The nominal size is 40, defining the passage area available for oil flow, and the body diameter measures 100 mm, setting the machining envelope. The cover withstands a maximum operating pressure of 420 bar, so it can be placed on high-pressure power units. A G1/2 BSPP threaded port is provided for remote pilot connection. Acceptable ambient temperatures range from −30 °C to 60 °C, allowing reliable cabinet or outdoor installation without auxiliary heating or cooling.
The hydraulic passage inside the LFA40H2-7X/F supports fluid temperatures between −30 °C and 80 °C, maintaining stable performance during cold starts and elevated oil temperatures. Viscosity limits span from 2.8 mm²/s to 500 mm²/s, so the cover accommodates both low-viscosity thin oils and thicker fluids used for damping. NBR sealing material is employed to retain oil and resist common hydraulic media throughout the specified temperature and viscosity ranges. These characteristics ensure consistent pilot response and leak-free operation across a wide spectrum of automated actuators and directional circuits.
Technical Specifications
Ambient Temp Max (nbr)
60 °C
Ambient Temp Min (nbr)
–30 °C
Body Diameter
100 mm
Fluid Temperature Max
80 °C
Fluid Temperature Min (nbr)
–30 °C
Max Kinematic Viscosity
500 mm²/s
Maximum Operating Pressure
420 bar
Min Kinematic Viscosity
2.8 mm²/s
Nominal Size
40
Remote Control Port Thread
G1/2 (BSPP)
Seal Material
NBR
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