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Purpose and working principle of rail stopcock
Orbital plug valve purposes: Orbital plug valve (nicknamed the warlord) for nominal pressure CLASS150-900LBS, operating temperature -29-180 ℃ in the petroleum, chemical, pharmaceutical, fertilizer, power industry and other conditions of the pipeline, cut off Or switch on the line medium. The main structural features of the rail plug valve: ①valve in the switching process, the valve sealing surface and the vane sealing surface without any contact, so the sealing surface friction, wear and tear, long service life of the valve, the switching torque is small; ② valve in the Maintenance, without the valve removed from the pipeline, just open the valve cover, swap a pair of vanes, maintenance is very convenient; ③ body and cock for the entire diameter, the medium through the valve without Flow resistance, and the ball can be cleaned on the pipeline, to overcome the shortcomings of the reduced diameter valve; ④ full-bore valve body cavity with hard chromium plated, hard and smooth sealing area; ⑤ elastic seal on the vane using fluorine rubber, And molded in the slider surface groove. ⑥ valve with automatic bleed device (optional), after the valve is completely closed, to prevent the valve chamber abnormal pressure and check the valve effect; ⑦ valve switch instructions Device and switch position synchronization, can accurately show the full-diameter gear transmission warlord's switch state. The working principle of the rail plug valve: 1, when the valve is fully open state, the passage of the plug hing valve body alignment, to ensure the ideal minimum pressure drop. 2, when turning the handwheel, the plug will turn in the direction of the valve, at the same time, it will drive the valve plate to rotate 90 degrees. When the handwheel continues to be rotated, the plug will depress so that the valve opens to both sides and the valve plate will tightly press On the valve seat, close the valve. 3, when the hand wheel to the opposite direction of rotation, the first move the plug upward, so that the valve seat in the detachment, continue to turn the hand wheel so that the plug driven valve disc rotation 90 degrees, and finally the stopper channel alignment of the valve body, The valve is fully open state. 4, the valve has the advantage of the valve in the process of opening, the valve plate and seat in a state of disengagement, the process of switching zero friction, will not wear the sealing surface, while the seal with a soft seal, the seal is closed at zero Give way.