Double eccentric semi-spherical valve using eccentric valve body, eccentric ball and valve seat, valve stem for rotary movement in the common trajectory automatic centering, the process of closing the more off the more tight, fully achieve the purpose of a good seal. Gui Long valve ball completely separated from the valve seat, eliminating the seal wear and tear, to overcome the traditional ball valve seat and the ball sealing surface is always worn problem, non-metallic elastic material is embedded in the metal seat, seat metal surface by a good protection. This product is especially suitable for steel, aluminum, fiber, tiny solid particles, pulp, coal ash, LPG and other media. Double eccentric half ball valve overview: eccentric half ball valve Features: First, the sealing pair (spool, valve seat) - bimetallic metal ball to achieve a hard seal ring, fire proof; Second, tight seal, spool and valve seat Of the seal is spherical contact, by three-dimensional eccentric to achieve zero leakage; Third, the seal of the valve spool left compensation, the valve used for a long time found seal wear, simply loosen the handwheel side of the limit bolt, closed Turn a little, can still achieve a reliable seal, to extend the service life. Fourth, the compression sleeve can be screwed off, adjust or replace the valve seat, the valve can still continue to use, to avoid the failure of the entire valve after the failure of the entire retirement. Due to welding different alloys (or combination of ball) bimetal sealing pair matching can be used for wear, corrosion resistance, high temperature and require strict sealing conditions. Double eccentric hemispherical valve purposes: general-purpose valves, pipeline valves, slurry valves, gas-specific valves, petrochemical valves, coal injection valve for the six series. In the petroleum, chemical, metallurgy, electric power, gas and other industries is the gate valve, globe valve, Y-valve, ball valve replacement products. Has been selling in the iron and steel industry in the pulverized coal injection, alumina industry pulp, mother liquor and alumina powder delivery, power industry, hydraulic (or dry) ash, petrochemical industry, gas industry and other occasions. Double eccentric hemisphere valve Scope of application: 1, Common valve: reasonable design, compact structure, with a small flow resistance, good sealing, light and flexible operation, especially suitable for low pressure pipe network of water, sewage, steam, , Pneumatic devices for long-distance automation. (Water, steam, sewage, pulp, mud and other non-corrosive media). 2, dedicated pulverized coal injection: used to control dust-laden gas, pulverized coal injection and other solid fluid delivery ideal equipment, widely used in metallurgy, mineral processing, power and other production processes blast furnace pulverized coal injection, milling system As well as dust removal system in a variety of pipeline control. It adopts the straight-through structure, the flow passage is smooth, no fouling and clogging occurs, and the sealing pair is made of Co-Cr-W alloy. After special heat treatment, the valve is resistant to abrasion and abrasion and the valve eccentric spherical surface has the function of automatic compensation. By adjusting the screw on the worm, so that the sealing pair in the case of a certain degree of wear and tear can still be achieved re-seal effect. (Dusty gas and granular fluid) 3. Special for petrochemical industry: It is a medium which is easy to corrode due to high pressure, high temperature, inflammable and explosive, and weak acid and alkali. It has good sealing, corrosion resistance, Closure light, can automatically remove the valve surface fouling characteristics, suitable for crude oil, heavy oil and other media delivery and oil cracking, food production process. (Oil, gas, gas, water, etc.). 4, blast furnace gas, gas-specific: Seal Vice use of Cr-Mn-Si cemented carbide, fire-resistant explosion-proof anti-static, sealing pair of high temperature 560 ℃, its anti-corrosion and anti-seizure ability are 6 times more stainless steel seal pair, Suitable for gas, coke oven gas, water gas, liquefied gas, natural gas pipeline transportation and pressure on the door station use. (Blast furnace gas, natural gas, dusty gas, etc.). Slurry fluid special: easy to transport sedimentation and precipitation, crystallization of the solution slurry, slurry ash and other processes in the two-phase fluid medium ideal process valve, can get rid of scale closure in the closure of obstacles to achieve a smooth closure. Its novel structure, unique design, with high efficiency and energy saving, good wear resistance, reliable sealing, easy operation, quick opening and closing, long life and other advantages. (Process slurry, slurry ash and other particles containing material delivery) Pipeline dedicated: belongs to the straight through the semi-spherical valve, no diameter reduction, the valve body channel and pipelines connected into a straight pipe straight pipe, cross-sectional area equal to the resistance is less than the reduced diameter, the whole Open, closed as long as 90 degrees can be achieved to facilitate long-distance pipeline transportation control. (Pulverized coal injection and gas transmission)