Bosch Rexroth | LFA40KWA7XP12X0012
LFA40KWA7X/P12X00/12
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The LFA40KWA7X/P12X00/12 control cover belongs to the LFA 2 Way Control Covers series from Bosch Rexroth and forms the hydraulic interface for two-way cartridge valves used in automated machines. It is built in size 40 so it aligns with cartridges of the same nominal bore, and it seats in an ISO 7368 cavity to ensure interchangeability across manifolds. A pilot valve attaches on the ISO 4401-03-02-0-05 face, while the NG6 size designation defines the external dimensions of that pilot element. Service connections follow the SAE external thread standard, and assembly bolts use UNC threads to secure the cover against pressure-induced separation. An M6 measuring port is provided for direct pressure readings during setup, and a 1.2 mm nozzle in the P-port meters pilot flow for stable actuation. The complete cover weighs 7.4 kg, adding sufficient mass to resist vibration when high-flow cycles occur.
The unit operates at pressures up to 420 bar so it can manage pump outputs found in presses, die-casting cells, and similar equipment. It accepts hydraulic fluids with viscosities between 2.8 mm²/s and 500 mm²/s, allowing reliable function during cold starts and at elevated oil temperatures. Maximum fluid temperature is +80 °C, and ambient air may reach +60 °C without derating, supporting installation in warm production halls. Internal passages are specified to an ISO 4406 cleanliness class of 20/18/15, limiting particulate contamination that could erode throttling edges. A calculated mean time to dangerous failure of 150 years contributes to safety metrics in performance level assessments.
Technical Specifications
Cleanliness Class
ISO 4406 20/18/15
Control Cover Weight
7.4 kg
Max Ambient Temperature
+60 °C
Max Fluid Temperature
+80 °C
Max Operating Pressure
420 bar
Max Viscosity
500 mm2/s
Measuring Port Thread
M6
Min Viscosity
2.8 mm2/s
Mounting Bolt Thread
UNC
Mounting Cavity
ISO 7368
Mttfd
150 years
Nozzle P Diameter
1.2 mm
Pilot Valve Interface
ISO 4401-03-02-0-05
Pilot Valve Size
NG6
Port Thread Standard
SAE (external)
Size
40
1620 Old Apex Road
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