eccentric rotating half ball valve working principle: eccentric rotating adjusting valve is a kind of new structure, fluid resistance small direct type body structure, in the rotary center of the valve core is not one of the axis of rotation, can reduce the seat wear and prolong service life; At the back of the valve core has a fin, which is beneficial to the stability of fluid flow, with excellent stability. At the same time, also has a large flow, the advantages of adjustable range is particularly suited to contain slurry process control system.

in order to ensure the large adjustable ratio and reliability, and reduce the instrument, can be used as shown in the figure below, eccentric rotary type regulating valve valve core. This valve can be used in acid gas or liquid, the structure and material conforms to the national anti-corrosion engineers learn standard NACEMR0175 & ndash; 2002

eccentric rotating half ball valve structure:

characteristics of eccentric rotating hemisphere body is simple, small resistance, and compared with diameter single, two-seat valves, with large flow capacity, but only about a third of its weight. Deflecting valve USES the rotary motion, the sealing of the stuffing box is improved at the same time have a larger output power, so the valve leakage is small, the stiffness is bigger, can work reliably under the rated pressure difference. Eccentric rotary valve core and valve stem make rotation movement only, so its switch turns on the friction force is small, when the valve core and valve seat contact closing, the valve core soft arm under the action of thrust actuator to produce small elastic deformation and the elastic tight force, make the valve core and valve seat contact more closely, therefore, the eccentric rotary valve leakage is very small. Close the valve at the same time the required thrust compared with ball valve, butterfly valve.

the characteristics of eccentric rotating half ball valve:

1) The seat long service life. Durable, solid metal or ceramic seat sealing ring and eccentric valve core, in the process of opening and closing, as shown on the left, to reduce the friction between Industrial Valves core and valve seat, improved the damage to the Industrial Valves seat sealing surface and resistance when open. When rotate to the closed position valve core, Industrial Valves core and valve seat ring can produce automatic overlapping action, get a more reasonable and collaboration between the sealing surface. Seat sealing material can choose 316 stainless steel, forging steel A105 surfacing welding tungsten carbide and ceramic.

2) Reliable performance. Special seat sealing design, it can automatic centering, lap, dynamic aim and valve core, can improve the service life. Seal can prevent particles deposited metal bearing axial plane rotation and prevent the valve core.

3) Can be a variety of operations. Automatic centering seat sealing and solid valve core, can be in any direction when using the forward and reverse flows to seal. Using backward flow direction, export turbulent area is far away from the valve seat sealing surface, another valve core is 90 ℃ trip also helps reduce the valve core and transverse flow, reduce the probability of damage.

4) Easy installation. Flanged valve body, with different levels of pipe flange connection. With different design requirements, also can avoid has exposed the flange bolts. When installation of locating surface and the overall effect is better also. Also can provide compression type without flange body, can rely on when installed flange bolt positioning.

eccentric rotating a ball valve technical parameters and performance index body material: WCB, ZG23O - 450; ZG1Cr18Ni9Ti; ZG1Cr18Ni12Mo2Ti; ZGOCr18Ni10Ti

core materials: 0 cr18ni12mo2ti; OCr18Ni12Mo2Ti surfacing welding department too alloy; 0 cr18ni12ti embedded polytetrafluoroethylene ( The seat) 。

flange standard: ANSIB16. 5 or JB/T79 piping flange and gasket.

air joint: Rcl / 4

accessories: valve locator ( Pneumatic, electric - Gas) ; Air filtering pressure reducing valve; The handwheel.

the environment temperature: - 40 ~ + 70 ℃

metal seated: - 195 ~ + 398 ℃

soft seat: - 73 ~ + ZO4OC

eccentric rotating half ball valve scope of urban construction, chemical industry, metallurgy, petroleum, pharmaceutical, food, beverage, environmental protection

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