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Hot Sale Truck Parts Gearbox Inhibitor Valve 1672231 for Dongfeng Volvo Truck

The 1672231 Suppression Valve is a specialized pneumatic control component used in the braking and air management systems of commercial vehicles, particularly heavy-duty trucks and buses. Designed to regulate airflow and suppress pressure fluctuations within the air brake circuit, this valve plays a critical role in ensuring stable and reliable operation of auxiliary pneumatic functions such as suspension leveling, trailer coupling, or air-controlled actuators.

Manufactured to meet original equipment (OE) specifications, the 1672231 valve helps prevent sudden pressure surges, reduces system noise, and protects downstream components from rapid cycling or mechanical shock. It is commonly installed in air line circuits between the main reservoir and controlled devices, functioning as a damping or buffering element.

This part is widely used in Dongfeng, Foton, and other Chinese commercial vehicle platforms equipped with advanced pneumatic systems. With durable construction and precise internal calibration, the 1672231 ensures long-term reliability under continuous use in harsh operating environments.

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Model:
1672231
Brand:
Dongfeng

Product Description

Attribute	Specification
Part Number	1672231
Product Name	Suppression Valve / Air Pressure Damping Valve
Function	Suppresses air pressure pulsations and stabilizes airflow in pneumatic circuits
Application System	Pneumatic Brake & Air Control Systems
Vehicle Type	Heavy-Duty Trucks, Buses, Commercial Vehicles
Installation Location	In-line within air piping (commonly near height control valves or relay valves)
Valve Type	Passive flow-damping check valve / restrictor-type suppressor
Operating Principle	Controls air release rate; prevents rapid exhaust or backflow
Body Material	Zinc-coated steel or brass (corrosion-resistant)
Sealing Material	Nitrile Butadiene Rubber (NBR) or FKM (Viton®) for oil and heat resistance
Port Size	G1/4" (ISO 228 standard) – female threaded ports
Connection Type	Push-in or screwed pipe connections (air line compatible)
Mounting Method	Bracket-mounted or direct installation via body threads
Working Medium	Compressed air (oil-mist lubricated or dry)
Compatibility	Direct replacement for OE part 1672231
Standards Compliance	GB/T 7306, ISO 4414, QC/T 77–2008 (pneumatic components for automotive use)

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Parameter	Specification
Maximum Operating Pressure	1.0 MPa (10 bar / 145 psi)
Minimum Operating Pressure	0.2 MPa (2 bar / 29 psi)
Pressure Rating (Burst)	≥ 3.0 MPa (30 bar)
Flow Direction	Typically unidirectional (check/damping function)
Flow Rate (Approx.)	150–250 L/min @ 7 bar (varies by design)
Response Time	< 0.5 seconds (passive mechanical action)
Operating Temperature Range	-40°C to +80°C (-40°F to +176°F)
Storage Temperature	-50°C to +90°C
Leakage Rate	≤ 3 cm³/min at 1.0 MPa (after 3 min test)
Vibration Resistance	Meets GB/T 28046 / ISO 16750 standards
Life Cycle	≥ 100,000 pressure cycles
Thread Standard	G1/4" BSP (British Standard Pipe) – parallel