Operating principle:
1.When closing the valve, turn the handwheel to make stem lowered. The interaction between precision helical guideway and guide pin makes stem and ball rotating synchronously, and the ball rotating frictionless by 90.Continue to turn the handwheel to lower the stem, thus to make the ball and valve seat closely contacted.
2. When opening the valve, the interaction between pin and guideway will be acted on the ball through the stem, making the ball detached from the seat, and then rotating by 90.There is no friction between seat and ball, which can lengthen its service life. Structural Features: 1. Frictionless sealing structure, upon opening the valve, the ball will be detached from the seat, and then rotating. As there is no scraping between seal faces, this valve is quite durable. 2. upon closing the valve, the interaction between pin and guideway performs more dependable seal. 3. upon closing the valve, the ball is kept a certain space from the seat during the process of rotation. With the rotation of the ball, flow rate will be reduced and flow velocity will be increased to make the seal faces clean. 4. Small volume, compact structure, easy operation and installation, in-line repair accessible, and long service life. 5. with electric or pneumatic device, remote control may be effected to deal with dangerous working conditions, thus to ensure personal safety.
Standard and regulation Design and Manufacture:GB/T12237-1989, API608 Inspection and test:GB/13927-1992, API598 Flange Connection dimension:JB/79.1-2-1994, ASME/ANSI B16.5 Face-to-face-dimension:GB/T12221-1989, GB/T15188.1-1994, ASME/ANSI B16.10 Driving manner: Manual operated, Worm gear operated, Pneumatic operated, Electric operated |
|
|
|
|
