Description
KN23040-G - 3/4" INLINE CHECK VALVE
PART NUMBER(S):
Fleet Products: KN23040-G | Replaces OE: Haldex: KN23040, N13526J | Automann: 170.KN23040 | WABCO: 9341990040 | Meritor: RKN23040, R955KN23040N | Euclid: E-MDKN23040N, E-SL10200-3/4 | Mack: 5396-KN23040 | Navistar: ZZKN23040
DESCRIPTION:
Model: Haldex KN23040 Inline Single Check Valve
Vehicles: Heavy-duty trucks and trailers using compatible air brake supply or service lines
• Valve Type: One-way pneumatic check valve
• Inlet Port: One 3/4" NPT male
• Outlet Port: One 3/4" NPT female
• Overall Length: 2.32"
• Mounting: Inline threaded installation
• Function: Permits airflow in one direction while preventing reverse airflow
• System Use: Isolates air-pressure zones and helps retain pressure within the air brake system
Applications:
Designed for truck and trailer air brake lines requiring one-directional airflow and protection against pressure backflow. It is typically replaced when air passes in both directions, pressure bleeds back through the valve, or internal restriction reduces airflow.
CROSS-REFERENCE(S):
UMKN23040, WAKN23040, MIDKN23040, 04-22-6002, 0587-23040P, 119373, 14547, 1498338, 23040P, 2358352, 320003, 401012, 4068, 40680, 4TA-19-1, 5296-KN23040, 934-199-004-0, CKN23040, EM40680, F224657, KN-23040, KN23040NP, LCV-4068, MIR-KN-23040, R955KN23040, R955KN23040X, S-A558, SA558, TDAR955KN23040, TDAR955KN23040N, TRKN23040, TV23040, TV9133, 34063, BA558GRP, 170KN23040, 8235R955KN23040N, 9341990260, S9341990040
A cross-reference listing means this part may be a suitable replacement for the listed part numbers. Always verify fitment before installation.
IMPORTANT INSTALLATION NOTES:
✔ Confirm both connections use 3/4" NPT threads before installation.
✔ Install the valve in the marked direction of airflow.
✔ Support the valve body while tightening to prevent damage from excessive torque.
✔ Apply air-system-compatible thread sealant without allowing sealant to enter the airflow passage.
✔ Pressurize the system and verify forward airflow, backflow prevention, and leak-free connections.
Warranty Information
