Description
KN31000-G PRESSURE PROTECTION VALVE
PART NUMBER(S):
Fleet Products: KN31000-G (New), KN31000| Replaces OE: Haldex KN31000, KN31001, KN31011 | Automann 170.KN31000 | Euclid E-MDKN31000X, EMDKN31000N
DESCRIPTION:
Model: KN31000 Series – Pressure Protection Valve
Vehicles: Universal for Heavy-Duty Trucks and Trailers
• Function: Prevents loss of system air pressure due to accessory circuit failures
• Open Operating Pressure: 65 ± 8 PSI
• Close Operating Pressure: 45 ± 8 PSI
• Inlet Port: 1/4" NPT
• Outlet Port: 1/4" NPT
• Accessory Port B: 1/4"–18 Thread
• Accessory Port C: 1/8"–27 Thread
• Mounting Style: Inline or direct mount
• Material: OEM-grade corrosion-resistant metal
• System Integrity: Protects primary air circuits; maintains safe brake operation under auxiliary system fault
Applications:
Used across truck, trailer, and bus air systems to safeguard main braking circuits from accessory system air depletion. Standard in fleets with high accessory demands (e.g., air suspension, lift axles). Enables consistent pressure thresholds for circuit activation and protection.
CROSS-REFERENCE(S):
90555396, N15759DC, 5396-KN31000, 2430717, 9019718, 20QE1326, 20QE2109, 20QE2286, 745-285537, 3107966, 356596C91, N15759, N15759A, N15759L, KWM778A, L13530, LV90554107, MBI90554107, PR4, 110257, H-30030
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 between main air supply and protected circuit
✔ Ensure correct orientation of inlet and outlet ports
✔ Accessory ports must be sealed if not in use
✔ Filter (KN31025) recommended for contaminated air systems
✔ No torque specifications are explicitly documented—follow OEM air valve installation best practices
Warranty Information
