Heavy-Duty High Pressure CNG Shut Off Valve 20MPa with Integrated Filter
The Heavy-Duty High Pressure CNG Shut Off Valve 20MPa is an advanced safety and flow-regulation module engineered for compressed natural gas vehicles. Rated for extreme operating pressures up to 20MPa, this unit integrates a high-flow electromagnetic shut-off mechanism with a built-in particulate filter to safeguard the entire fueling loop.
To ensure optimal pressure stability and rapid response, the CNG cut-off valve is a high pressure solenoid valve with integrated filter. Professional installation dictates positioning it securely between the CNG cylinder valve and the CNG reducer, maintaining a minimal distance from the CNG pressure regulator to prevent pressure drops.
Technical Specifications
| Application Fuel | Compressed Natural Gas (CNG) |
|---|---|
| Max Working Pressure | 20MPa |
| Pipeline Interface | M12x1 thread for φ 6mm rigid pipe |
| Thermal Operating Range | -40 ℃ to 120 ℃ |
| Solenoid Coil Voltage | DC 12V |
| Coil Power Consumption | 20W |
Engineering Advantages & Pain-Point Solutions
1. Instantaneous High-Pressure Isolation
Managing 20MPa of compressed natural gas requires uncompromising reliability. Powered by a responsive 12V 20W electromagnetic coil, this valve instantly seals the high-pressure line the moment the ignition is cut or the ECU switches to petrol mode, completely eliminating accidental line leakage or residual pressure build-up.
2. Built-In Filtration Against Contaminant Stalling
A frequently cited complaint among vehicle owners on technical forums is sudden engine choking or injector clogging caused by pipeline scale. By incorporating an internal filtration matrix directly inside the high-pressure body, this valve captures microscopic debris before it can compromise sensitive components downstream.
3. Rugged Thermal & Mechanical Endurance
Built for harsh under-hood environments, the assembly handles ambient extremes from sub-zero -40 ℃ winters to searing 120 ℃ engine bays. Its standardized M12x1 ports ensure a perfect mechanical seal with φ 6mm high-pressure lines.
Frequently Asked Questions (FAQ)
Q: Why does my vehicle experience hesitation or fail to switch over to CNG under heavy acceleration?
A: This issue is usually linked to a restricted internal filter or a voltage drop preventing the 20W coil from fully retracting the internal plunger. Ensuring clean filtration upstream of the CNG reducer resolves most starvation problems.
Q: How frequently should the integrated filter inside the 20MPa valve be serviced?
A: For optimal performance and longevity, technicians recommend inspecting and cleaning or replacing the internal filter element every 15,000 to 20,000 kilometers, depending on local gas fuel cleanliness.
Q: Can this 20MPa high-pressure valve be installed near the storage cylinder instead of the reducer?
A: While cylinder-mounted valves exist, this specific model is optimized to be installed close to the CNG reducer as much as possible, minimizing the length of high-pressure lines and ensuring immediate, precise regulation.
