Description
280809 DOUBLE CHECK VALVE – 3/8" NPT, HORIZONTAL MOUNT
PART NUMBER(S):
Fleet Products: 280809-G | OE: 280809, KN25110, BHV280809, BNS280809N | Automann: 170.280809, 170280809, AM170280809, 287626, 287627 | Bendix: 109227, 280809, 280809BXW, 280809N, 287626, 287627, BEN-230809N, BEN-280809, BEN-280809N, BW109227, BW280809N, BW287626, BW287627, BX109227, BX280809, BX287626, BX287627 | Dayton Parts: AV280809 | Euclid: E-BN280809N | Freightliner: BW280809 | Haldex: KN25110 | Kenworth: K295-141 | Mack: 745-280809N | Meritor: R955280809N, R955280809X | Navistar: 422-950-C, 422950C, 422950C91, BAN280809N, BX280809N, ZAC280809 | OE Aftermarket: 5963978, B16922GRP | PAI: 4071, EM40710, LCV-4071 | Power Products: 280809P | Tectran: 14566, TV280809 | Torque: TR280809 | USA Star Truck Products: US31-1113 | Volvo Truck: 3081430
DESCRIPTION:
Model: Double Check Valve, 4-Port, Horizontal Mount
Vehicles: Universal fitment for heavy-duty trucks, trailers, and buses with air brake systems
• Inlet A: 3/8" NPT (female)
• Inlet B: 3/8" NPT (female)
• Outlet C: 3/8" NPT (female)
• Outlet D: 3/8" NPT (female)
• Function: Selects the higher of two air pressure sources and directs flow to a single output; prevents backflow
• Operation: Internal shuttle valve actuates based on pressure differential
• Port Configuration: 2 inlets, 2 outlets, all 3/8"-18 NPT
• Material: Die-cast zinc body for durability and corrosion resistance
• Temperature Range: -40°F to +200°F (-40°C to +93°C)
• Mounting: Must be installed horizontally to ensure correct shuttle operation
– Internal shuttle disc isolates lower pressure source
– No thread sealant required
– Integrated exhaust protection and inlet filtration
Applications:
This double check valve is used in commercial vehicle brake and air systems where air delivery must come from whichever pressure source is higher at a given time. Ideal for use in dual-source service brake circuits, trailer emergency lines, or auxiliary control systems. Interchangeable with most OE and aftermarket models including use on trucks from Mack, Volvo, and Navistar.Designed for pneumatic air brake control systems where two independent sources (e.g., service and emergency circuits) must feed a single function
CROSS-REFERENCE(S):
280809, BHV280809, BNS280809N, KN25110, KN25110N, 287626, 287627, 280809N, 280809BXW, DC4, DC-4, R955280809N, K295-141, K295141, K029547, 422950C91, AV278597, AV280809, S-16922, S16922, 9D0338, 25002200164, 802127, TV280809, TLA280809, 3081430, 724040002, 744040002, 745280809, 745-280809, ZAC280809, BAN280809, 116386, SF05963978, SF5963978, 2530004830834, 03902814, 3902814, RKN25110, 109227, 280809BXW, BW109227, BW280809, BW287626, BX109227, BX280809, BX287626, BX287627, E-BN280809N, BER-280809, K280809, 5963978, B16922GRP, US31-1113, TR280809, 4071, EM40710, LCV-4071, 14566, AM170280809, 170280809, BEN-280809, BEN-280809N
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:
✔ Mount valve horizontally to allow correct operation of internal shuttle disc
✔ Do not apply thread sealant unless explicitly required by system manufacturer
✔ Confirm pressure sources do not exceed rated 200°F / 130 PSI
✔ Test operation after installation by supplying air from each input side individually
✔ Replace if any sign of internal sticking or backflow occurs
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