Haldex Trailer Brake Control Valve
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Haldex Trailer Brake Control Valves: Precision Air Control for Heavy-Duty Trailers
When a loaded semi-trailer needs to stop, the trailer brake control valve is the unsung hero of the entire air brake circuit. It governs the flow of compressed air from the tractor to the trailer's service brake chambers, translating cab-pedal input into precise, proportional stopping force. A worn or failed valve means delayed brake response, uneven trailer braking, and — critically — potential jackknifing under hard stops. That makes choosing a trusted manufacturer non-negotiable, and few names carry more weight in the heavy-duty air brake world than Haldex.
Over 130 Years of Braking Expertise Behind Every Valve
Haldex is a leading global supplier of sustainable brake systems and air suspension solutions dedicated to the commercial vehicle industry, with over 130 years of innovation providing competitive expertise in brake and air suspension systems. A Swedish company based in Landskrona, Haldex has an extensive history in the commercial vehicle industry, focusing its manufacturing on brake products and air suspension systems. That depth of institutional knowledge flows directly into their trailer brake control valves — components engineered to perform in the most demanding fleet environments.
The Haldex RT4 Multi-Function Trailer Brake Control Valve
Haldex's trailer brake control valve lineup includes the RT4 multi-function trailer valve, which goes through a stringent remanufacturing process to ensure it fits and works just like the original component. This "Like-Nu" remanufactured approach is central to Haldex's aftermarket philosophy: rather than offering a generic replacement, the valve is rebuilt to match OEM specifications — preserving the calibrated crack pressures and port configurations that the original brake circuit was designed around.
Haldex trailer brake control valves are available with specific configurations such as a 3/8" trailer supply, 1/2" reservoir, and 55 PSI PPV closing pressure , giving technicians the precise spec data needed to confirm compatibility before installation. Part number cross-referencing — including well-known numbers like KN20541 — makes it straightforward to identify the correct valve for a given tractor-trailer application.
New and Remanufactured Options Built to Exacting Standards
Haldex remanufactured products are the result of superior components, precise processes, and exacting quality standards, with precise machining, manufacturing, and assembly practices used to meet demanding specifications — resulting in a full range of products that continue to set the industry standard for reliability. With remanufactured products from nearly forty different manufacturers, Haldex provides the most extensive line of any single remanufacturer.
Haldex also offers a full range of air control products such as compressed air dryers, valves, ABS, and EBS — all designed with safety and efficient operation in mind, cutting down on potential hazards and maintenance costs in the long run. This means the trailer brake control valve you source from Haldex is part of an integrated ecosystem of compatible air brake components, making it easier to standardize your fleet's service parts inventory.
Why Fleet Managers and Owner-Operators Choose Haldex
- OEM-heritage engineering: Haldex supplies original equipment to major truck and trailer manufacturers worldwide, meaning their aftermarket parts are built from the same knowledge base.
- Rigorous remanufacturing: The Like-Nu remanufacturing process subjects every valve to stringent testing before it leaves the facility.
- Broad application coverage: Dual-circuit supply configurations and rotating-cover designs support a wide range of tractor-trailer combinations.
- Global manufacturing backbone: Haldex runs manufacturing and R&D facilities in 19 countries across four continents , ensuring consistent quality and parts availability.
For fleets and repair shops that can't afford brake system downtime, Haldex trailer brake control valves deliver the fit, function, and durability that professional technicians depend on. Browse the full selection of Haldex Trailer Brake Control Valves to find the right valve for your application.