1. Installation method After changing the cylinder, when installing the pressure reducing valve, pay attention to the right and right thread, and then rotate the hand wheel in the reverse direction (counterclockwise direction). When rotating, the force is not too strong, and the correct hand sensing is easy. Otherwise, the thread may be misaligned. Do not force it in at this time. Recalibrate before screwing in until it is tightened. If the installation is correct, gently shake the pressure reducing valve body by hand, it will not shake left or right or feel loose; if the installation is not good, even if the handle wheel is screwed, but the thread is not correct, so gently shake the pressure reducing valve body will also There is a sense of looseness.
2. Leak detection method In order to ensure safe use, after the pressure reducing valve is installed, the soapy water can be brushed at the interface for inspection to see if there is any air leakage. For example, the pressure reducing valve with pressure display can close the angle valve and smell if there is any leaking smell and observe whether the pointer changes. The rubber sealing ring at the end of the pressure reducing valve is an important part to prevent air leakage. Every time the liquefied petroleum gas cylinder is replaced, it should be checked whether the sealing ring is intact. If it is deformed or damaged, it must be replaced before it can be used. . According to the analysis of poisoning and explosion accidents in the past, more than 60% of them are caused by the failure of the pressure relief valve or the loss or damage of the rubber seal. Therefore, it is necessary to draw lessons and pay attention.
3, maintenance methods
(1) The breathing hole of the upper cover of the pressure reducing valve is used to adjust the amount of air to ensure that the pressure reducing valve acts as a step-down and voltage regulator and cannot be blocked. In the past, many users did not understand the above-mentioned effects of the breathing hole, which made the pressure reducing valve dirty and unwilling to clean. Some people did not pay attention when cleaning the pressure reducing valve with a cloth, often the upper valve cover was clean. However, the breathing hole was clogged with debris during the wiping process to cause an accident. Therefore, during the cleaning process, if the breathing hole is found to be clogged, it can be carefully penetrated with a fine iron wire, but it is prevented from puncturing or damaging the rubber film in the pressure reducing valve.
(2) If the liquefied petroleum gas cylinder and position are not in compliance with the requirements, it may cause the liquefied petroleum gas to flow into the pressure reducing valve, causing the rubber sealing ring to dissolve and expand, making the air inlet gap smaller or blocked, affecting normal use. In addition, the rubber sealing ring is a wearing part, and after long-term use, it will be pitted due to the corrosive action of the liquefied petroleum gas, causing air leakage. Therefore, it should be checked regularly.
(3) The aging of the rubber film of the pressure reducing valve is a common cause of air leakage. It is understood that many users in order to use the bottom of the bottle to put the cylinder upside down, use hot water or fire to heat the gas cylinder, etc., so that the bottom of the gas bottle bottom residue into the pressure relief valve cavity, after a long time, the diaphragm is aging leakage. For security reasons, these practices are not allowed.
In addition, if the fixed mother wire of the pressure reducing valve is loose, or the edge of the rubber film is crushed when the mother wire is tightened to fasten the upper and lower valve covers, air leakage may also occur. In particular, if the rubber film locking device of the pressure reducing valve is detached or the rubber film is broken, an explosion accident may occur due to high pressure gas supply.
(4) The structure of the pressure reducing valve is relatively strict. The products are carefully assembled and assembled before being shipped out of the factory and are manufactured after strict inspection. Therefore, the connecting screws and adjusting parts are not allowed to be disassembled or unscrewed by the user, so as not to reduce the decompression. The sealing performance of the valve and the pressure reduction and voltage regulation performance are also required to prevent the high-pressure direct air supply caused by the disassembly damage and cause a fire accident.
(From Hebei Zhenxing Gas Pressure Regulator Co., Ltd.** Gas ​​Regulator http://)
Http://news.chinawj.com.cn Editor: (Hardware Business Network Information Center) http://news.chinawj.com.cn
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