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(888) 312-8812 Login SignupWILLIAMS CONTROLS 118181 Air Brake Pressure Protection Valve - 1/4" NPT, 70 psi
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$2949
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Get it by Monday, Feb 9
WILLIAMS CONTROLS 118181 Part Description
Manufacturer
Features & Benefits
- Responds predictably to minor pressure fluctuations in a multi-tank system
- Condensed profile eases routing around crossed airline bundles in crowded compartments
- Valve action pairs well with dashboards that monitor auxiliary-pressure circuits
- Supports long-term service schedules in fleets running frequent short-haul cycles
Williams Controls WM778A Air Brake Pressure Protection Valve
The Williams Controls WM778A Air Brake Pressure Protection Valve helps portion air supply to auxiliary circuits by opening only after system pressure reaches its 70-psi threshold. Its 1/4" NPT configuration suits brake layouts where accessory functions must stay isolated until the primary brake reservoir reaches safe pressure levels. The valve’s internal layout helps keep secondary devices from drawing air too early, supporting consistent system order during cold starts or extended staging. Its compact form also fits neatly into tight brake-control clusters, and the threaded ports allow straightforward replacement without modifying the surrounding plumbing. If a vehicle depends on structured air management that prioritizes brake pressure first, the Williams Controls 118181 fits the task with steady performance.
WILLIAMS CONTROLS 118181 Specifications
Product Attributes
| Port | 1/4" NPT |
| Nominal Pressure | 70 psi |
WILLIAMS CONTROLS 118181 Cross References
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WILLIAMS CONTROLS 118181 Manufacturer Information
A division of Curtiss-Wright Corporation, Williams Controls® specializes in aftermarket electronic, hydraulic, and pneumatic control solutions for commercial vehicles. Originally founded in 1937 to manufacture brake components for logging trucks, it has grown into one of the leading producers of control systems for the heavy duty vehicle market. It has also pioneered key products and technologies such as the pneumatic controls and electronic throttle controls for trucks and buses. Today, Williams Controls offers a comprehensive lineup of hand, joystick, throttle controls, adjustable pedal systems, handrest systems, and sensors for all commercial vehicles. All products are manufactured under a strict Quality and Environmental System and comply with ISO standards.
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