Description
278597-G - DC-4 DOUBLE CHECK VALVE - 4 PORT
PART NUMBER(S):
Fleet Products: 278597-G | Replaces OE: Bendix: 278597, 278597N, 285542 | WABCO: 9340990060 | Haldex: KN25080, N20966E | Terex: 2463081 | Mack: 745-278597
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 1/4"-18 NPT female
• Mounting: In-line, horizontal orientation recommended
• Operating Temperature: -40°F to 200°F (-40°C to 93°C)
• Mounting Hole Distance: 2.75"
• Internal Design: Directional shuttle disc
• Function: Routes the higher of two supply pressures to the delivery circuit
Applications:
Designed for pneumatic systems where two air-pressure sources control a common function. The internal shuttle automatically isolates the lower-pressure source and directs the higher pressure to the delivery ports, supporting emergency, override, and auxiliary air brake functions.
CROSS-REFERENCE(S):
278597BXW, 278597X, BEN278597, BEN278597N, H278597X, TV278597, 172412R92, 20QE255P2, 22905, 2R0618, AV278597, BAN278597N, BW 278597N, BX278597N, TWDBEN278597N, S-16921, VTC-69191, B16919GRP, SM-6871
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 with the internal shuttle positioned horizontally for proper movement.
✔ Match each supply and delivery connection to the pneumatic schematic.
✔ Apply air-system-compatible sealant without allowing sealant inside the valve.
✔ Pressurize both supply circuits and verify correct pressure selection and leak-free operation.
Warranty Information
