Self-closing Valve for Gas Pipeline with Sealing Cover
Installation Location
The self-closing valve can be installed on the gas pipeline in front of the stove or water heater.
Product Advantages
Pipeline self-close safety Valve’s feature and advantages
1. Reliable sealing
2. High sensitivity
3. Quick response
4. Small size
5. No energy consumption
6. Easy to install and use
7. Long service life
Function Introduction
Overpressure automatic shutdown
When the pressure regulator at the front end of the gas pipeline works abnormally or the pipeline pressure is too high due to the pipeline pressure test conducted by the gas company, and exceeds the overpressure setting value of the pipeline gas self-closing valve, the valve will automatically close due to the overpressure to prevent the overpressure caused by the pipeline pressure. Excessively high and gas leakage occurs.
Underpressure automatic shutdown
When the pressure regulator at the front end of the gas pipeline is abnormal, during the peak period of gas consumption, the gas pipeline is frozen and blocked, gas shortage in winter, gas shutdown, replacement, decompression and other operations cause the pipeline pressure to drop and fall below the set value, The valve will automatically close under pressure to prevent gas leakage accidents that may occur when the air pressure is restored.
Overflow automatic shutdown
When the gas source switch and the front-end pressure regulator of the gas pipeline are abnormal, or the rubber hose falls off, ages, ruptures, the aluminum-plastic pipe and metal hose are perforated by electric corrosion, cracks appear in stress changes, the connection is loose, and the gas stove is abnormal, etc., When the gas flow in the pipeline overflows for a long time and exceeds the set value of the overcurrent flow of the valve, the valve will automatically close due to overcurrent, interrupting the gas supply, and preventing possible safety accidents caused by excessive gas outflow.
Instruction For Use
Valve initial closed state
normal working state
Undervoltage or overcurrent self-shutdown
overpressure self-shutdown
1. In the normal air supply state, gently lift up the valve lifting button (just lift it up gently, do not use too much force), the valve will open, and the lifting button will automatically reset after releasing it. If the lifting button cannot be reset automatically, please manually press the lifting button to reset.
2. The normal working state of the valve is shown in the figure. If it is necessary to interrupt the gas supply of the gas appliance during use, it is only necessary to close the manual valve at the outlet end of the valve. It is strictly forbidden to press the indicator module by hand to directly close the valve.
3. If the indicator module drops and closes the valve during use, it means that the valve has entered an undervoltage or overcurrent self-closing state (as shown in the figure). Users can check themselves by the following reasons. For problems that cannot be resolved by themselves, they must be resolved by the gas company. Do not solve it by yourself, the possible reasons are as follows:
(1) The gas supply is interrupted or the pipeline pressure is too low;
(2) The gas company stops gas due to equipment maintenance;
(3) Outdoor pipelines are damaged by man-made and natural disasters;
(4) Others in the room The emergency shut-off valve is closed due to abnormal conditions;
(5) The rubber hose falls off or the gas appliance is abnormal (such as gas leakage caused by an abnormal switch);
4. During use, if the indicator module is found to rise to the highest position, it means that the valve is in an overpressure self-closing state (as shown in the figure). Users can conduct self-inspection through the following reasons and solve them through the gas company. Do not solve it by yourself. After troubleshooting, press the indicator module to restore the valve to the initial closed state, and lift the valve lift button again to open the valve. Possible causes of overpressure autism include the following:
(1) The front end pressure regulator of the gas pipeline is not working properly;
(2) The gas company conducts pipeline operations. Excessive pipeline pressure due to pressure testing;
5. During use, if you accidentally touch the indicator module, causing the valve to close, you need to lift the button to reopen the valve.
Tech Specs
| Items | Performance | Reference Standard | |||
| Working medium | Natural gas，Coal gas | ||||
| Rated Flow | 0.7 m³/h | 1.0 m³/h | 2.0 m³/h | CJ/T 447-2014 | |
| Operating pressure | 2kPa | ||||
| Operating temperature | ’-10℃～+40℃ | ||||
| Storage temperature | ’-25℃～+55℃ | ||||
| Humidity | 5%～90% | ||||
| Leakage | 15KPa detection 1min ≤20mL/h | CJ/T 447-2014 | |||
| Closing time | ≤3s | ||||
| Overpressure self-closing pressure | 8±2kPa | CJ/T 447-2014 | |||
| Underpressure self-closing pressure | 0.8±0.2kPa | CJ/T 447-2014 | |||
| Overflow self-closing flow | 1.4m³/h | 2.0m³/h | 4.0m³/h | CJ/T 447-2014 | |
