Yutong Natural Gas Bus Pressure Regulator 8JY1.4-0.8 - Compatible with Yuchai Weichai Natural Gas Engine Pressure Reducer Assembly
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| Part Number | 8JY1.4-0.8 |
| Product Name | Natural Gas Bus Pressure Regulator/Gas Pressure Reducing Valve Assembly |
| Compatible Fuel Type | Compressed Natural Gas (CNG) |
| Import Pressure Range | 20-25 MPa (High Pressure Cylinder) |
| Export Stable Pressure | 0.8-1.2 MPa (Engine Air Supply Pressure) |
| Maximum Flow | ≥ 120 kg/h (suitable for 400kW engine) |
| Operating Temperature | -40℃ ~ +120℃ |
| Filter Accuracy | ≤ 10 μm (Built-in High Precision Filter Core) |
| Safety Relief Pressure | 1.5-1.8 MPa (with safety valve protection) |
| Interface Thread Specification | Import M22×1.5 / Export M27×1.5 (Typical heavy truck/bus standard) |
| Shell Material | Aluminum alloy forging (high strength, corrosion resistance, lightweight) |
| Diaphragm Material | Fluororubber/Polyurethane composite material (resistant to low temperature, aging resistance, excellent sealing property) |
| Emission Standard Compatibility | China V standard, VI standard (GB 17691/GB 3847) |
| Certification | ECE R110 / ISO 15500 / GB 19244 |
Engine Part No.
Yuchai YC6NGWeichai WP4.1NGWeichai WP5NGWeichai WP7NGWeichai WP10NGWeichai WP12NGWeichai WP13NG
Fitment Vehicles
Yutong Natural Gas BusYutong 6-18m BusYutong Intercity BusNew Energy Commercial Vehicle
Fuel System - Industrial Encyclopedia
The 8JY1.4-0.8 pressure regulator assembly specially designed for Yutong natural gas buses, precisely compatible with Yuchai YC6NG series and Weichai WP4.1NG/WP7NG/WP10NG/WP12NG/WP13NG natural gas engines. This pressure reducer is responsible for reducing the high-pressure natural gas to a stable supply for the engine, ensuring constant gas pressure and improving combustion efficiency and emission compliance. The product meets the requirements of national V/VI emission standards and is widely used in 6-18 meter urban buses, intercity passenger transport, and other new energy commercial vehicle scenarios. It is a core key component of the gas supply system.