|
Jiangsu aka Auto-Control Valve Co., Ltd. is set technology, research and development, design, production, sale, trade and services as one of the non-regional enterprise,
the company mainly produces GB, DIN, ANSI, API, BJ.JIS series valves. |
|
|
|
|
|
Aka--News
|
| Principles and characteristics of the track ball |
Track ball is a relatively new type of ball category, it has its own unique structure some advantages, such as switches without friction, seal easy to wear, a small opening and closing torque. This feature can reduce the actuator specifications. With multi-turn electric actuators can be realized on media regulation and tight cut. Widely used in petroleum, chemical, urban drainage and other demanding cutting conditions.
It works as follows:
An open process
The role of a mechanical pressure in the closed position, the ball by the stem, and pressed on the seat, as shown in a Fig.
2 When the handwheel counterclockwise stem the reverse movement, its flat bottom corner to make the ball disengage the seat, as shown in Figure b.
3 stem continue to improve, and interact with the stem spiral groove guide pins, making the sphere began to rotate without friction, as shown in Figure c.
4 up to the fully open position, the valve stem to the limit position, the ball rotated to the fully open position, as shown in Figure d.
Second, the closing process
When a closed clockwise handwheel stem begins to drop and the ball away from the seat begins to rotate, as shown in Figure a1.
2 Continue turning the handwheel, stem being embedded in the spiral groove on its guide pins of the role of the stem and ball while rotating 90 °, as shown in Figure b1.
3 is about to close, the sphere has been in the case of non-contact with the valve seat is rotated 90 °, as shown in c1 in Fig.
The last few laps four hand wheel rotation, angular plane mechanically wedge to the oppression of the stem at the bottom of the ball, it tightly against the valve seat, to be completely sealed, as shown in Figure d1.
Track ball of structural features:
1, open and close without friction. This feature completely solve the traditional valve due to friction between the sealing surface and affect the sealing problem.
2, coat structure. For pipeline valves mounted directly on-line inspection and maintenance, can effectively reduce the plant parking, and reduce costs.
3, single-seat design. Remove the valve due to abnormal pressure in the cavity medium affect the use of security issues.
4, low torque design. Special structural design of the stem, just with a little hand wheel can easily open and close the valve.
5, wedge-shaped sealing structure. Valve stem is provided by mechanical force, to a seat on the ball and wedge pressure seal, the valve seal is not affected by changes in pipeline pressure, sealing performance under various conditions have a reliable guarantee.
6, the structure of the sealing surface self-cleaning. When the ball away from the seat tilt, pipeline fluid sealing surface of the sphere along a 360 ° uniform through, not only eliminates the high-speed fluid on the seat of local erosion, but also washed away the sealing surface accumulations reach self-cleaning purposes.
|
|
|
Jiangsu aka Auto-Control Valve Co., Ltd. copyrighted All Tel: 400-1058266 Mobile: 13771005555 company mainly produces GB, DIN, ANSI, API, BJ.JIS series valves
Wuxi Sales Headquarters Phone: 0510-88559967 Fax: 0510-88559897 Mobile: 13861718882
Website: lwbooks.cn mail: sales@jsakfm.com
Address: Dafeng City, Jiangsu Province Economic Development Zone |
|
