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Eccentric Segmented Ball Valve, eccentric Semi Ball Valve

Eccentric Segment ball valve is a new type of semi-ball valve developed to solve two-phase mixed flow medium transportation problem. It can adjust and tight cut medium with unique advantages: no friction on the switch, no abrasion on the seal and small opening and closing moment. Widely used in conditions require strict cutting off in petroleum,paper, heating, urban water supply, drainage etc.  

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Standard and Scope:

Size: NPS 1 1/2"～120"  DN40～DN3000
Pressure Rating:  PN2.5~PN100, ANSI 150/300/600               
Connection: Double flange, wafer, weld
Temperature: -29～550℃ 
Medium: water, media containing fibers, small solid particles, slurry, oil, gas, etc.
Operation: Manual, Pneumatic, Electric, Hydraulic, Electro-hydraulic
Body Material: WCB, CF8, CF8M, 4A, etc.
Design and Manufacture: GB/T12237-2015，GB/T 26146-2010;  API 6D
Test and Inspection: GB/T12237-2015, GB/T 26146-2010;    API 6D, BS EN12569; 
Shell test: 1.5 PN(water), Seal test: 1.1 PN(water)
Face-to-Face: Manufacture std, GB/T12221-2005;  ASME/ANSI B16.10
End Connection:  GB/T 9113,  ASME/ANSI B16.5, ANSI B16.5, EN1092-1-2010

Design Feature:  
 
1.Integral body design offers greater rigidity against fluctuating pipe loads.Eliminates the leak risk lead by two piece body designs.Both wafer and flange connection are available..
2.Eccentric semi ball valve is a single seat design. Eliminated the problem of abnormal pressure rise in the chamber medium of the valve, which affects the safety of use.
3.Low torque design. The valve stem with a special structural design can be easily opened and closed.
4.Open and close without friction. This function completely solves the problem of traditional valves affecting sealing due to friction between sealing surfaces.
5.Wedge shaped sealing structure. Valves rely on the mechanical force provided by the valve stem to press the ball onto the valve seat, ensuring that the sealing performance of the valve is not affected by changes in pipeline pressure difference. Reliable sealing performance is guaranteed under various working conditions.
6.The self-cleaning structure of the sealing surface of the eccentric segment ball valve. When the sphere tilts away from the valve seat, the fluid in the pipeline passes along the sealing surface of the sphere at a 360°, not only eliminating the local scouring of the valve seat by high-speed fluid, but also flushing away the accumulation on the sealing surface, achieving the purpose of self-cleaning.
7.Often used for switch control, bigger size than V-sharped semi ball valve, can reach DN3000.
8.Movable valve seat, easy for replace and maintenances.

The disc of the V-shaped ball valve also adopts a hemispherical structure, with a V-shaped opening on the valve core. Through the V-shaped opening, smaller flow can be controlled, and its flow capacity is larger than general regulating valves. So its adjustable ratio far exceeds ordinary regulating valves. However, the sealing surface of the V-shaped ball valve core is always in close contact with the valve seat. The valve shaft and the centerline of the hemisphere are located at the centerline of the flow channel, without an eccentric structure like eccentric semi ball valve.
 

Seat

Available with a metal seat and soft seat.Specialized spring design decreases valve torque while providing force for tight sealing. Automatically compensating seal is reliable both positive pressure and  reverse pressure was applied.
 

Bearing/Stem

Stem and end post bearings are low friction and maintenance free.  The stem is finely ground to match the actuator excellently, which prevents rocking motion and potential failure 

 

Top mounted& Side mountd


The eccentric ball valve top mounted needs to be installed perpendicular to the pipeline, with a simple internal structure. The valve only needs to be opened at a 90 degree angle with the valve stem to control the flow of the medium. Suitable for controlling media with low viscosity and few particle impurities in pipelines, such as water, gas, oil, and other media.
Side mounted valves can be installed horizontally or diagonally. However, side mounted valves have more sealing surfaces, resulting in a more complex internal structure. Suitable for pipelines with poor media and high particle content, such as chemical, metallurgical, power and other fields.

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