What are the methods to solve the malfunction of pressure reducing valves in natural gas combustion engines?
What are the methods to solve the malfunction of pressure reducing valves in natural gas combustion engines?
What are the common malfunctions of the pressure reducing valve in natural gas combustion engines? Let’s learn about it together below!
1. The pressure reducing valve of the natural gas burner cannot be screwed into the angle valve. Sliding wire of pressure reducing valve handwheel; The inlet of the pressure reducing valve is not aligned with the angle valve interface; The angle valve interface is damaged.
Repair or replace the handwheel of the pressure reducing valve, or replace the entire pressure reducing valve. When the angle valve interface is damaged, the angle valve or the entire liquefied petroleum gas cylinder must be replaced. But users cannot replace or repair steel cylinders on their own. The cylinder (along with the angle valve) should be sent to a professional maintenance department for handling. If the two interfaces are not aligned, simply realign the inlet of the pressure reducing valve with the angled valve interface and slowly rotate it to the left (counterclockwise) to tighten it smoothly.
2. The pressure reducing valve of the natural gas burner is leaking. The screws on the upper and lower covers of the valve body are not tightened; The rubber film inside the valve body is damaged; The inlet sealing ring is damaged due to aging.
Tighten the upper and lower cap screws; Replace the rubber film; The rubber sealing ring connecting the pressure reducing valve and the cylinder plays a role in sealing the air supply. After long-term use, it will wear and age, and even cause a large amount of deviation when replacing the cylinder, resulting in serious accidents. Therefore, every time the cylinder is replaced and the pressure reducing valve is installed, special attention should be paid to checking whether the rubber sealing ring is intact and whether there is aging and wear. Especially during installation, it is necessary to check whether the sealing ring is worn. If it has aged or worn out, it should be replaced in a timely manner, but it cannot be replaced by thin film cutting. A dedicated sealing ring must be used.
3. Blocked breathing holes cannot regulate pressure. Not paying attention to daily maintenance and cleaning can contaminate the pressure reducing valve with debris, causing the small circular hole with a diameter of about 1 millimeter on the upper shell to become blocked. This small circular hole is a breathing hole, and the breathing hole and pressure reducing valve are located in the upper chamber of the rubber film. When the diaphragm moves up and down, air enters and exits through the breathing hole to achieve pressure regulation. Therefore, if the breathing hole is blocked, the air diaphragm cannot enter and exit normally, causing the failure of liquefied petroleum gas pressure regulation, resulting in the direct supply of high-pressure liquefied petroleum gas to natural gas. Therefore, the flame of the fuel suddenly increases or detonates to extinguish and operate, leading to fire or poisoning accidents.
Regularly inspect and clean to maintain a smooth breathing hole. When LPG leaks out of the gas port, it indicates that the rubber film is damaged. The angle valve should be closed immediately, the pressure reducing valve should be removed, the diaphragm should be replaced, or a new pressure reducing valve should be installed.
4. Abnormal flow or pressure of pressure reducing valve in natural gas burner. The main reason is that the rubber seal has expanded and deformed for too long. If it has been deformed, the apron should be replaced. Usually caused by clogged filter screens. Clean the filter screen and keep it clean.