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14750652H hydraulic Manual Air Control Valve Cabin Part HOWO Auto Parts Sinotruk Shacman Camc FAW Heavy Truck Parts Weichai Yuchai
Product Name: hydraulic Manual Air Control Valve
Part Number: 14750652H
Product Model: Sinotruk HOWO
Product After Sales Service: 3 Months
Product Origin: JINAN
Product Unit: PCS
Product Advantages: high-density, good performance, long service life.
The hand brake valve (also called the parking brake control valve) in a heavy-duty truck is a key component of the air brake system. Its main functions include:
Applies the parking brakes when manually activated (typically by pulling the valve knob).
Releases air pressure from the spring brake chambers, causing the spring to expand and lock the wheels.
Releases the parking brakes when deactivated (pushing the valve in).
Restores air pressure to the spring brakes, compressing the spring and allowing the vehicle to move.
If the service brakes fail, the driver can manually apply the parking brakes for emergency stopping.
Some hand brake valves have a trailer parking brake function, allowing independent control of the trailer's spring brakes.
Automatically engages if air pressure drops (e.g., air leak or engine shutdown), preventing unintended vehicle movement.
Complies with FMVSS 121 (U.S.) and ECE R13 (Europe) safety standards for commercial vehicles.
Hand Brake Valve / Parking Brake Valve - Manual control for spring brakes.
Spring Brake Chambers - Use mechanical springs to apply brakes when air pressure is released.
Tractor Protection Valve - Isolates the tractor's air supply if the trailer disconnects.
Fail-Secure Mechanism - Ensures brakes engage if system pressure is lost.
This valve is critical for driver safety, compliance, and preventing rollaway incidents in heavy trucks.
Shandong Tongjia Supply Chain Management Co., Ltd. was established in 2002, and in 2014, it set up a subsidiary Jinan Perfect Power Auto Parts Co. specializes in the sale of heavy-duty trucks and truck parts. The company primarily focuses on distributing Sinotruk, Shacman, Foton truck parts, and various construction machinery components, offering over 200,000 distinct items. Shandong Tongjia emphasizes international trade, exporting goods to Africa, the Middle East, Southeast Asia, South America, Eastern Europe, and other global markets. The company has developed a dedicated and professional technical staff and sales team, establishing a comprehensive management system. Shandong Tongjia is committed to providing customers with high-quality and affordable products. Currently, its offerings are well-received both domestically and internationally, consistently earning praise from customers around the world.
We have worked with many of the world's leading brands,and almost all of our co-operators have been satisfied with our products and services,and have continued their co-operation for many years. We are looking forward to your enquiry,let's cooperate and win together !
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