Description
278598-G - DC-4 DOUBLE CHECK VALVE - 4 PORT
PART NUMBER(S):
Fleet Products: 278598-G | Replaces OE: Bendix: 278598 | Automann: 170.278598 | Haldex: N20966F, KN25110 | Navistar: 181-153-R, 181153R, 181153R2 | Oshkosh: 2257FX1 | Mack: 745-278598 | Volvo: 3918388 | Freightliner: BW278598 | Meritor: RKN25100 | Euclid: E-BN278598 | Tectran: 14555, TV278598
DESCRIPTION:
Model: Bendix DC-4 Double Check Valve
Vehicles: Heavy-duty trucks and trailers using compatible pneumatic brake and auxiliary air circuits
• Valve Type: Shuttle-operated double check valve
• Supply Ports: One 3/8" NPT male, one 1/4" NPT female
• Delivery Ports: Two 3/8" NPT female
• Mounting: Horizontal orientation
• Mounting Hole Distance: 2.75"
• Internal Design: Movable directional shuttle
• Function: Routes the higher supply pressure to both delivery ports
Applications:
Designed for pneumatic systems where two independent pressure sources control a common function. The internal shuttle isolates the lower-pressure source and directs the higher pressure to the delivery circuit, supporting redundant, emergency, and auxiliary air brake functions.
CROSS-REFERENCE(S):
278598N, 278598X, 278598BXW, BEN278598, BEN-278598, BNW278598N, BW 278598N, FS278598X, KN25110+AR357, B16920GRP, S-16920, S16920, BER-278598, BX278598, 745278598N, A7X4056, 72404-5002, 78208-0001, 72404-0008, 514019
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 the two supply and two delivery port sizes before installation.
✔ Install horizontally to support proper shuttle movement.
✔ Connect both pressure sources according to the pneumatic schematic.
✔ Apply air-system-compatible sealant without allowing sealant inside the valve.
✔ Test each supply separately for correct selection, no backflow, and no leakage.
Warranty Information
