Description
PRESSURE PROTECTION VALVE – 75 PSI OPENING (1/2" NPT)
PART NUMBER(S):
Fleet Products: 90554107, 90554107-G | OE: 90554107, KN31000, WM778 | Automann: 170.90554107
DESCRIPTION:
Model: Pressure Protection Valve
Vehicles: Universal application on truck and trailer air brake systems
• Valve Type: Pressure protection, normally closed
• Function: Isolates auxiliary air systems (e.g., suspension) to safeguard the primary brake circuit
• Actuation: Pneumatic, opens at system threshold
• Ports: 1/4" NPT (inlet, outlet)
• Opening Pressure: 75 PSI (min)
• Closing Pressure: 70 PSI
• Max Operating Pressure: 150 PSI
• Mounting: Inline installation, threaded ports
• Construction: OEM-grade with corrosion-resistant housing
• Filter: Internal, serviceable, protects against system contamination
• Dimensions: Height: 2.95" | Length: 3.95" | Width: 2.85"
• Weight: Approx. 0.53 lb
• System Fitment: Used across truck/trailer air brake platforms, typically in auxiliary systems (e.g., air suspension, lift
Applications:
Designed to protect the integrity of truck and trailer air brake systems by isolating auxiliary air circuits until safe operating pressure is achieved. Common in systems requiring staged air delivery, such as air suspension, lift axle actuators, and air-accessory management. Suitable for use across Freightliner, Kenworth, Mack, Navistar, Volvo, and Western Star platforms.
CROSS-REFERENCE(S):
90554107, 90554107-G, ZZ90554107, 90554107PTP, 070-90554107, 170.90554107, ETP-90554107, FS-6596N, NW90554107, 90054001, E4324, 118181, WM778, WM778-A, E-4325, E4325, F4HS2A435DA, 19QE2109, 790331C91, 90054473, 17-7-261, 767653252131, 72807-0005, 12900146, 32755707, A-CF9852-1, RBQ109083, 35708-4401, 023-150, 023-290, 023150, 023290, HAL90554107, HDX90554107, MID90554107, MER-R304324, MIR-90554107, S-27090, S27090, TR90554107, 90560150, 023-150, 023-290, 023150, 023290, 2507525C91, 90054001, 90554107, M6596NT, MNC023-150, MNC023-290, E4324, FS-6596N, 90554107, 070-90554107, 90054001, E4324, 118181, WM778, WM778-A, E-4325, E4325, F4HS2A435DA, 19QE2109, 790331C91, 90054001, 90054473, 17-7-261, 767653252131, NW90554107, 72807-0005, 12900146, 32755707, A-CF9852-1, RBQ109083, 35708-4401
A cross-reference listing means this part may be a compatible replacement for these part numbers based on OEM or distributor data.
IMPORTANT INSTALLATION NOTES:
✔ Install inline on auxiliary system air line, downstream of service reservoir
✔ Confirm 75 PSI opening pressure is suitable for system application
✔ Follow standard 1/4" NPT installation practices
✔ Ensure filter remains clean to avoid restriction; replace or service as needed
✔ Maintain orientation for correct air flow and pressure function
✔ No torque specs specified—apply standard torque for brass-threaded NPT fittings
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