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(888) 312-8812 Login SignupWILLIAMS CONTROLS 130845 WM778 Series Air Brake Pressure Protection Valve, Normally Closed, (2) 1/4 in. NPT Ports
$19449
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In Stock
Get it by Friday, Aug 21
WILLIAMS CONTROLS 130845 Part Description
Manufacturer
Product Description
WM778 Series Air Brake Pressure Protection Valve, Normally Closed
Features & Benefits
- Three-way valve configuration controls supply delivery and exhaust airflow within pneumatic circuits
- Pilot pressure activation range triggers diaphragm movement for consistent valve actuation response
- Integrated breather assembly limits contaminant entry and reduces internal moisture buildup
- Rapid exhaust function releases downstream air quickly during system disengagement cycles
Williams Controls Normally Closed Relay Valve
Ensure responsive braking control with the Williams Controls Normally Closed Relay Valve. Designed as a pilot-operated three-way non-compensating valve, it remains closed until pilot pressure between 35–45 psi actuates the internal diaphragm. This action unseats the poppet and directs supply air to the delivery port for controlled system response. When pilot pressure is removed, the valve closes and quickly exhausts downstream air to atmosphere, supporting rapid release. An integrated WM111B breather helps protect the control circuit from contamination, ensuring consistent operation with the Williams Controls 130845 WM147L1 normally closed relay valve.
WILLIAMS CONTROLS 130845 Specifications
Product Attributes
| Closing Pressure | Closes automatically below 70 PSI (FMVSS121 compliant) |
| Maximum Operating Pressure | 150 psi |
| Notes | with Exhaust Filter |
| Port Size | (2) 1/4 in. NPT ports |
| Operating Temperature Range | -40-deg. F to 180-deg. F (-40-deg. C to 82-deg. C) |
| Default Position | Normally closed until 70 PSI (482 kPa) is reached |
| Series | WM778 Series |
WILLIAMS CONTROLS 130845 Cross References
| Brand | Part Number |
|---|---|
| WIL130845 | |
| Tectran | WM147L1, WM778A1 |
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WILLIAMS CONTROLS 130845 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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