__12335.1750369354.gif?c=2 "278614-g double check valve for truck air brake systems, 3/8 npt ports, horizontal mount, oem-grade shuttle design")
__12335.1750369354.gif?c=2 "278614-g double check valve for truck air brake systems, 3/8 npt ports, horizontal mount, oem-grade shuttle design")
__12335.1750369354.gif?c=2 "278614-g double check valve for truck air brake systems, 3/8 npt ports, horizontal mount, oem-grade shuttle design")
Product Description
DOUBLE CHECK VALVE – 278614-G
PART NUMBER(S):
Fleet Products: 278614-G | OE: 278614, KN25061, N20954A | Automann: 170.278614
DESCRIPTION:
Model: DC-4 Type Double Check Valve
Vehicles: Compatible with truck and trailer air brake systems
• Valve Type: Double check valve with 3 ports
• Function: Selects higher-pressure air source from two inputs; prevents backflow
• Inlets: A & B – 3/8"-18 NPT (female)
• Outlet: C – 3/8"-18 NPT (female)
• Air Port Quantity: 3 total
• Thread Type: NPT
• Mounting Hole Diameter: 0.34–0.35"
• Actuation: Pneumatic (shuttle-based pressure balancing)
• Operating Temperature: -40°F to +200°F (-40°C to +93°C)
• Mounting Orientation: Must be mounted horizontally as shown
• Material: OEM-grade cast body
• Weight: ~0.67 lbs
• Unique Features:
– Automatically selects higher-pressure source
– OEM-grade shuttle for durability and precision
– Compatible with most competitive models
– Interchangeable across major OEM systems
– Compact form factor for universal fit
Applications:
Designed for use in heavy-duty truck and trailer air brake systems requiring selection between two independent pressure sources. The 278614-G (DC-4 type) valve provides seamless backflow protection and automatic pressure balancing, making it ideal for parking/emergency circuits or dual tank configurations.
CROSS-REFERENCE(S):
278614, RB-278614, KN25061, N20954A, 15507-BCV278614, BW278614, 229521
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:
✔ All ports are 3/8"-18 NPT (female)
✔ Mount horizontally only as per OEM specification
✔ Use in dual-source air systems requiring isolation and priority selection
✔ Ensure shuttle moves freely—do not install upside down
✔ Torque fittings using standard NPT practices for leak-free sealing
✔ Interchangeable with most competitive models
SOLD AS NEW
Brand new and ready to install, with OEM Grade Reliability
SUPPORT & ORDERING
For technical support, installation guidance, or to confirm fitment, Call: 1-877-243-0442 | Email: sales@fleet-products.com
WHY CHOOSE FLEET PRODUCTS | KBR - HEAVY DUTY TRUCK & TRAILER PARTS?
- Canadian-owned and operated since 1985
- Trusted by fleets, mechanics, and B2B partners across North America
- Fast, reliable shipping across North America
- Competitive pricing with core return refunds
- Price Match Guarantee | Find a better price? We'll beat the difference by 10%!
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