Domestic gas commonly used is divided into four categories: natural gas, liquefied petroleum gas, artificial gas and liquefied petroleum gas and air mixture, in which the smallest corrosive gas, liquefied petroleum gas followed, corrosion is the biggest artificial gas, artificial coal gas harmful substance is mainly sulfur dioxide, naphthalene, coal tar and so on.
Natural gas valve materials can be used without special requirements, if you use ordinary carbon steel, be sure to do surface treatment to prevent rust. However, in the use of artificial valve on the gas is best not to use ordinary copper, which, after contact with water into a copper sulfate and sulfur dioxide on the corrosion of parts much. I should say yes; artificial gas in the valve, pipe very easy to knot Naphthalene is a white crystalline, hard, not easy to get rid of, affecting the valve closing and opening. Kick into gear in the coal tar sticky valves, tubes everywhere, very difficult to clean up. At present, there is no good solution.
Gas valve with artificial valves can be used with low pressure cast iron, ductile iron pressure medium can be used, can be used with high pressure cast stainless steel (316). Best not to use regular steel. The rubber diaphragm pneumatic valve chamber housing is best not to use steel stamping structure that must use the internal need to do more advanced surface treatment (such as: nickel-phosphorus plating, etc.). ball valve Trunnion Mounted Ball Valve Floating Ball Valve Top Entry Ball Valve ball valve V Type Ball Valve
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