Currently used in the domestic O-ball valve are given under preload core and seat friction on and off, often leading to sealing surface damage, valve leakage and stuck phenomenon, GQ47H rail valve is designed to address the common defects of the updated design The ball 90-degree rotation of the ball and then switch the new ball valve, the ball can seal the surface friction-free combination to achieve the safety of non-leak and greatly improve the service life of the valve.
Track Ball Valve Features: - Shanghai Hongfeng Track Ball Valve introduced
1, single seat design. Elimination of the valve cavity medium due to abnormal pressure and affect the use of safety issues.
2, low torque design. Special structure design of the valve stem, just with a small hand wheel valve can easily open and close.
3, opening and closing without friction. This function completely solves the problem that traditional valves affect the sealing due to mutual friction between the sealing surfaces.
4, body-type structure. On the pipeline installed on the valve can be directly online inspection and maintenance. Can effectively reduce the device parking, reduce production costs.
Track ball valve works: - Shanghai Hongfeng trackball valve introduced
â‘ When the valve is in the fully open position, turn the handwheel clockwise, with the stem nut and thrust bearing, the stem starts to descend and the ball begins to rotate.
â‘¡ continuous rotation of the hand wheel, the stem of the precision spiral curve groove track, and the guide pin embedded in it interaction, driven by the ball with a non-stop rotation of the valve stem in a clockwise direction.
③ When the valve is about to be closed, the stem drives the ball to rotate by 90 ° without any friction with the seat sealing surface.
â‘£ continue to turn the handwheel, the valve stem will descend again to press the ball body, so that the ball and valve seat in close contact, so as to achieve the sealing effect.
⑤ Turn the handwheel counterclockwise when the valve is in the fully closed position. In cooperation with the stem nut and thrust bearing, the stem starts to rise and the ball starts to rotate.
â‘¥ continuous rotation of the hand wheel, the stem will rise at the same time drive the ball from the seat.
⑦ When the valve is to be opened, the precision helical groove on the valve stem and the guide pin embedded in it interact with each other to drive the ball to rotate counterclockwise without any friction with the sealing surface of the valve seat.
⑧ continue to turn the handwheel, when the stem rose to the limit position, this time the ball has also been inverted with the valve stem 90 ° valve has been fully open position.
Track ball valve design specifications
Design basis GB API
Structure length JB / T 7745
GB / T 12221 ANSI B16.10
Connecting flange GB / T 9113
JB / 79
HG20592 ANSI B16.5
Butt end GB / T 12224 MSS SP44
ANSI B16.25
Test and inspection JB / T 9092 API 598
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