Description
278615-G - DIAPHRAGM-TYPE DOUBLE CHECK VALVE - 1/4" NPT, NON-POSITION-SENSITIVE
PART NUMBER(S):
Fleet Products: 278615-G | Replaces OE: Bendix: 278615, 275858, 285543, 288334 | Automann: 170.278615 | Haldex: KN25060, N20954A | WABCO: 9340990030, 9340990140 | International: 1676719C | White: 72404-0012 | Volvo: 3081439 | Mack: 745-278615N | Caterpillar: 6D-3781 | Meritor: R955278615N | Euclid: E-BN278615N | Dayton Parts: AV278615 | Tectran: 14558, TV278615 | OE: 12378837-001
DESCRIPTION:
Model: Bendix Diaphragm-Type Double Check Valve
Vehicles: Heavy-duty trucks, buses, and trailers using compatible dual-source pneumatic circuits
• Valve Type: Diaphragm-operated double check valve
• Supply Ports: Two 1/4" NPT female
• Delivery Port: One 1/4" NPT female
• Mounting Hole Diameter: 13/32"
• Mounting Hole Distance: 2-19/32"
• Mounting: Non-position-sensitive
• Operating Temperature: -40°F to 200°F (-40°C to 93°C)
• Function: Selects the higher of two pressure sources
• Backflow Protection: Isolates the lower-pressure source
• Design: Internal diaphragm for low leakage and rapid response
Applications:
Designed for pneumatic brake and auxiliary systems where two independent pressure sources control one common circuit. The internal diaphragm directs the higher pressure to the delivery port while preventing reverse airflow between the two supply circuits.
CROSS-REFERENCE(S):
278615N, 278615BXW, 278615P, H278615, DC-4, DC4, 1779P1005, 8935030544, A261H75, A3495V74, EBN278615X, RKN25060, RMPN20945A, 217698, 277988, 278614, 283321, 286414, 287181, 287628, 289547, S117726, 350180, 8A1388, C4TS2575B, D5TA2K119AA, D5TZ2K119A, 825388, ALA5344, MBW278615, X17457, 15536221, 2099294, 2485247, 78037062, 86683301, 7926001228, 201129AA, KSV4040734, 13QE15, 20QE2222R, 20QE283, 170278615, AM170278615, 745278615N, BAN278615N, BEN-278615, BEN-278615N, BER-278615, BW275858, BW278615, BW278615N, BW285543, BW288334, BX275858, BX278615, BX278615N, BX285543, BX288334, FC278615, GTA278615, R955278615, R955278615X, TDAR955278615N, 724040012, 6D3781, TV278915, ZAC27615, S-16923, S16923, WA278615, K278615, 4R-15-2, 0587-278615P, 4820-360-6152, 48203606152
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 all three ports are 1/4" NPT female.
✔ Install in any suitable orientation without restricting diaphragm movement.
✔ Connect both supply sources and the delivery line according to the pneumatic schematic.
✔ Apply air-system-compatible sealant without allowing sealant inside the valve.
✔ Test each supply separately for correct pressure selection, no backflow, and no leakage.
Warranty Information
