Plug valve

Plug is closed or the rotation of the plunger type valve. Plug as cut off and on the most suitable for medium and diversion, but according to the applicable properties and erosion resistance of sealing surface, sometimes also can be used for throttling.
The main purpose of the a and plug valve is: first of all, widely used in oil field in the mining, transport and refining equipment, petrochemical industry, chemical industry, coal gas, natural gas, liquefied petroleum gas, hvac industry and general industry. Second plug also applies to the flow of liquids containing suspended solids and granular, cut-through plug cooperate after heat preservation measures can conveying material containing the crystals. Nowadays, the application range of the plug is bigger and bigger, appeared with a forced lubrication oil seal plug valve.
Due to the forced lubrication to plug and plug is formed between the sealing surface of a layer of oil film. So better sealing performance, easy open and close, to prevent the sealing surface damage.
Control valve key features: plug valve has simple structure, switch rapidly, fluid resistance small, angular travel fast operation. Soft sealing plug valve commonly used in high corrosive, toxic and harmful medium harsh environment, strictly banned leak, and valve material not medium formation pollution occasion.
Can be used according to the working temperature and medium adopt self-lubricating bushing material, in the whole working process of the seal friction coefficient is small, the plug body flexible operation, long service life. Suitable for use in high scouring of gas-solid, liquid-solid phase medium, medium high or external leakage requirement. Medium can be two-way flow, with unlimited installation direction, can realize on-line maintenance, use rise more convenient. Plug valve can prevent electrostatic unique design, fire safety, use safety.
Double seal ascension plug valve has the function of blocking and emissions, slab gate valve on the pressure balance device, in case of a system exception booster, and can reduce the resistance of the valve opening and closing moments. Due to metal surfaces touch each other after sealing ring is compressed, the valve has fireproof function.
Valve maintenance is very convenient, but without removing the valve from the pipeline, by removing the end cover at the bottom of the valve body can be removed from the valve on both sides of the board replacement for pneumatic control valve. So it is widely used in petroleum, natural gas, metallurgy, mining, gas engineering, light textile, dock, food and environmental protection water treatment and other industries to adjust, opening and closing of pipeline fluid.