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Replacement Parts

Proportioning Valves

World American WA278825 SV-1 Synchronizing Air Brake Control Valve 42 PSI 0.25" Ports NPT - Replaces Bendix 278825 Mack 745-278825N Volvo Truck 3949404 Meritor R955278825 Newstar S17744 Tectran 14559

World American WA278825 SV-1 Synchronizing Air Brake Control Valve 42 PSI 0.25" Ports NPT - Replaces Bendix 278825 Mack 745-278825N Volvo Truck 3949404 Meritor R955278825 Newstar S17744 Tectran 14559
- Designed as a Type SV-1 Synchronizing Valve, this World American SSA 278825 unit operates at 42 PSI inlet pressure, delivering precise brake synchronization for heavy-duty truck and trailer systems.
- Built with 0.25-inch NPT control, delivery, and supply ports, this valve ensures optimal air flow and dependable performance in modern air brake applications.
- Features include 0.125" exhaust port, 28 PSI exhaust pressure, and reliable NPT thread type to match OE spec requirements for direct fitment.
- Engineered for compatibility with brake systems across Freightliner, Mack, Volvo, and more—ideal for air brake control in demanding on-road conditions.
- Includes one SV-1 valve assembly; replaces over 30 OE and aftermarket part numbers including Bendix 278825N, Automann 170.278825, and Meritor R955278825.

Country	USA
Brand	World American
Manufacturer	World American
Binding	Automotive
ItemPartNumber	WA278825
Model	WA278825
Warranty	1 Year / 100,000 Miles
ReleaseDate	2017-11-22
UnitCount	1
UPCs	698231361153
EANs	0698231361153

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