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(888) 312-8812 Login SignupWILLIAMS CONTROLS WM674A WM674 Series Dual Function Parking Brake Control, Panel Mount, 1/4-18 NPTF, 150 psi
$42699
30 Day Lead Time
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WILLIAMS CONTROLS WM674A Part Description
Manufacturer
Product Description
WM674 Series Dual Function Parking Brake Control, Panel Mount
Williams Controls Parking Brake Control Module
Manage parking and emergency brake functions with the Williams Controls Parking Brake Control Module. This dual-function module combines two manually operated three-way valves into a compact assembly for spring brake control. Designed with automatic low-pressure protection, the Williams Controls WM674A applies the parking brake if system pressure falls below the operating threshold. Integrating multiple valve functions into one assembly also helps simplify plumbing on compatible air brake systems.
The WM674 is a dual function valve used to control spring brakes under normal and emergency conditions. Each WM674 unit consists of two manually operated three-way valves housed in a common body. When pressure at its inlet exceeds 45 PSI (310 kPa), the first valve (square button) which is spring-loaded so supply pressure can flow through it to release the spring breaks and charge the emergency supply tank. If supply pressure falls between 20-35 PSI, the first valve automatically closes and exhausts downstream pressure to cause emergency application of the spring brakes. An integral check valve in the second valve protects pressure in the emergency supply tank. The second valve can be applied to allow air to flow from the tank so the springs so the vehicle can be moved. Since the second valve’s function is for temporary emergency use, the round button must be manually held down. As soon as the button is released, pressure at the outlet is exhausted to atmosphere and spring brakes are reapplied. Part Number: DASH VALVE 106841 Manufactured by Brake Systems.
Features & Benefits
- Compact assembly helps reduce external air line routing
WILLIAMS CONTROLS WM674A Specifications
Product Attributes
| Exhaust Port Size | 1/8-27 NPTF |
| Body Casting Material | Die Cast Aluminum |
| Automatic Application Pressure | 20-35 psi |
| Hardware Material | Cadmium Plated Steel |
| Inlet Port Thread Size | 1/4-18 NPTF |
| Inlet to Outlet Flow Rating | 20 SCFM @ 100 psi |
| Mounting Type | Panel Mounted |
| Maximum Supply Pressure | 150 psi |
| Operating Temperature Range | -20-deg. F to 150 -deg. F |
| Mounting Attitude | Optional |
| Outlet Port Thread Size | 1/4-18 NPTF |
| Series | WM674 |
| Outlet to Exhaust Flow Rating | 25 SCFM @ 100 psi |
| Tank to Outlet Flow Rating | 35 SCFM @ 100 psi |
| Seals & O-Rings Material | Buna N |
WILLIAMS CONTROLS WM674A Cross References
| Brand | Part Number |
|---|---|
| Tectran | 106841 |
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WILLIAMS CONTROLS WM674A 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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