Labor-saving operation: The medium pressure on the ball generates all the force to the upper and lower bearings, the ball body will not move relative to the position, the sealing force of both ends of the seat is uniform, and the operating torque is low. The spring preloaded movable metal seat structure can be used for high temperature, high pressure and various media pipelines. According to customer requirements, can be designed to be suitable for media containing particles, slurry and so on. Widely used in food, medicine, petroleum, chemical, natural gas, steel, environmental protection, paper and other media pipelines.
Product characteristics
1. Frictionless opening and closing: All these functions completely solve the problem that the sealing performance of the traditional valve is affected by the friction between the sealing surface.
2. Top type structure: the valve installed on the pipeline can be directly checked and repaired online. It can effectively reduce the device parking and reduce the production cost.
3. Separate seat design: eliminate the problem that the medium in the valve cavity affects the safety of use due to a pressure boost.
4. Low torque design: The stem with special structure design can be easily opened and closed with a small wheel valve.
5. Wedge seal structure: The valve actually relies on the mechanical force provided by the valve stem to press the ball wedge to the seat and seal. The sealing performance of the valve is not affected by the pressure difference of the pipeline, and the sealing performance can be guaranteed under various working conditions.
6. Self-cleaning structure of sealing surface: when the ball tilts away from the seat, the flow in the pipeline will pass evenly along the ball sealing surface into 360°. Not only eliminates the local rush of high-speed fluid to the seat, but also washes away the accumulation on the sealing surface to achieve the purpose of self-cleaning.
Standards and specifications
1. Design standard :GB/T12237
2. Structure length :GB/T12221
3. Flange size :GB/T9113, JB/T 79
4. Test and inspection :GB/T13927
Operating principle
1. When the valve is in the fully open position, turn the hand wheel clockwise, and with the valve stem nut and the thrust bearing, the valve stem begins to fall and drive the ball to start spinning.
2. Continuously rotate the handwheel, the precision spiral curve groove track on the valve stem interacts with the guide pin embedded in it, driving the ball to rotate clockwise with the valve stem.
3. When the valve is about to close, the stem drives the valve ball to rotate 90° without friction with the sealing surface of the seat.
4. Continue to rotate the handwheel, and the valve stem falling again will mechanically press the ball, so that the ball is in close contact with the seat. To achieve sealing effect.
5. Turn the handwheel counterclockwise when the valve is in the fully closed position. In combination with the stem nut and the thrust bearing, the stem begins to rise and drives the ball away from the seat.
6. Continuous rotation of the handwheel and valve stem will drive the ball to tilt away from the seat while rising.
7. When the valve is about to be opened, the precision spiral curve groove track on the valve stem interacts with the guide pin embedded in it to drive the ball to rotate in the counterclockwise direction without friction with the sealing surface of the valve seat.
8. Continue to turn the handwheel, when the valve stem rises to the limit position, the ball has reversed 90° with the valve stem and the valve is in the fully open position.
