Safety valve is a very important protection valve, widely used in various pressure vessels and piping systems, when the pressure in the pressure system exceeds the specified value, it can automatically open, the excess media to the atmosphere Go, to ensure the safe operation of pressure vessels and piping systems to prevent accidents, and when the system pressure back to the working pressure or slightly lower than the working pressure can automatically shut down. Reliable valve work is directly related to the safety of equipment and personal safety valves must pay attention to the causes of failure and analysis of common causes and solutions 1, the safety valve leakage in the normal working pressure of the device, valve and seat sealing surface occurred Exceed the allowable degree of leakage, leakage of safety valve will not only lead to loss of media. In addition, the constant leakage of media can also damage the hard sealing material. However, the sealing surface of the commonly used safety valve is a metal material to a metal material, and although it strives to be smooth and flat, it is very difficult to absolutely leak under the medium pressure. Therefore, the working medium is a steam safety valve, under the specified pressure value, if the naked eye at the exit of the invisible, there is no leak, it is considered the sealing performance is qualified 2, Leakage between the upper and lower valve body junction surface leakage, resulting in such leakage are mainly due to the following aspects: First, the binding surface of the bolt tightness or tightness, resulting in poor sealing surface. Elimination method is to adjust the bolt tightness, the tight bolt must be diagonally tight manner, it is best to measure the tightness around the gap, the bolt tight so far, and the junction of the gap around Consistent. Second, the safety valve body with tooth-shaped gasket seal does not meet the standard. For example, the radial seal groove slightly grooved, poor parallelism, tip too sharp or over-the-slope and other defects can cause seal failure. So that the valve body surface leakage. In the maintenance of spare parts quality, the use of standard toothed gaskets can prevent this from happening. Third, the safety valve body surface with poor flatness or hard impurities caused by gasket seal failure. The valve body due to the flatness of the joint surface caused by poor bonding surface leakage, the elimination of the valve is to disintegrate the valve to re-ground the joint until the quality standards. As a result of impurities caused by gasket failure, the valve assembly carefully clean the joint surface to avoid impurities fall into 3, the main safety valve after the impulse safety valve does not move This phenomenon is often referred to as the main security door refused to move. The main security door refuse to move to the boiler in danger is very large, is a major hidden dangers of equipment, seriously affecting the safe operation of equipment, and pressure in the pipeline when the medium pressure exceeds the rated value, the main safety gate No action, so that equipment over-pressure operation can easily cause equipment damage and major accidents. The main safety valve safety valve refused to move mainly with the following factors: safety valve valve moving parts have jamming phenomenon. This may be due to improper assembly, dirt and impurities mixed or parts corrosion; poor surface finish of the piston chamber, surface damage, there are defects such as groove marks caused by defects. This article Keywords: safety valve
Higher quality and Lower Price Carbon Steel Concentric Reducer ,Stainless Steel Concentric Reducer ,Carbon Steel Ecccentric Reducer,Stainless Steel Ecccentric Reducer Produced by Jimeng Group.
Carbon Steel Concentric Reducer ,Stainless Steel Concentric Reducer ,Carbon Steel Ecccentric Reducer,Stainless Steel Ecccentric Reducer
Size:DN 10-DN 2000
Standard:ANSI,ASME,JIS,KS,GOST,DIN,UNI,EN,GB
Export Country:US.UK.SERBIA,RUSSIA,ITALY,IRAN,KOREA,JAPAN,SPAIN,CHILE,BRAZIL
SCH NO:5,10,20,30.40,60,80,120,140,160,STD,XS
Welding Method:Seam,Seamless,Half Seamless.
Radius Type:1.5D(Long),1.0D(Short)
Surface Finish:Nature Surface,Sand Blasting,Painting.
Material:SS 304/304L/316/316L/201/430,CS Q235/A234/Q195/A105/20#/16MN
Pipe Reducer
Pipe Reducer, Eccentric Pipe Reducer, Concentric Pipe Reducer, Steel Pipe Reducer
Hebei Jimeng Highstrength Flange-tubes Group Co.,Ltd. , https://www.jimengflange.com