Closed circuit device of pipe throttle stop venting valve is widely used in petroleum, natural gas, coal gas, liquefied petroleum gas engine oil refinery, airport, chemical, oil and gas storage and transportation and so on.
Note: parameters are for reference only, or are not full. Valve can be used in accordance with the requirements of different pressure, material, diameter, drive, etc.. Specific please contact or online advisory contact.
Order note:
If there is no selected model, please provide detailed parameters, such as medium, temperature, pressure, caliber, material and so on. Our technicians will select for you
Two. Provided that the selected model is available according to the selected model
Three, non standard products need to provide samples or confirmed by drawings
Note: the information is for reference only, or incomplete, so please feel sorry for the inconvenience. The company can choose according to different requirements and parameters. The company has a variety of sizes, pressure, different materials, connections, drive mode, to meet the different needs of various types of gate valve. Please contact 021-6651 8677 or consult online.
1, normally closed: valve seal for pressure in the seat on the boss, to form a hard seal, soft and embedded on the valve flap and the valve seat sealing surface is pressed to form second sealing, double sealing structure ensures zero leakage of the valve, then the valve clack opened balance hole in the closing and opening of the valve, when the valve is a small force, the valve open and closed with a small torque.
2, slow pressure state: the bottom of the valve seat to leave the valve seat sealing surface, due to the end of the valve flap close to the cage shaped set on the bottom edge of the bottom, this time the valve and the cage shaped sleeve inner diameter to form a seal. Without direct vent relief, so as to achieve the relaxation effect.
3, throttle state: valve bottom carbonyl left seat, further open, at the head of a throttle throttle, high-speed flow after the slow pressure after throttling flow directly to the small valve, because the valve cover the edge of the window is the ultimate throttle, high pressure direct scouring medium throttle valve at the bottom of the channel, due to change of medium eddy current, reduce the direct scouring medium valve seat seal, so as to avoid direct scouring medium, at the same time as the valve sealing surface is tapered, can blow the dirt and impurities and the valve seat sealing surface of the sealing surface protection, so as to prolong the service life of the valve.
4, fully open state: valve in the fully open state, the valve in full emptying, less resistance in fluid in the popular, shorten the venting time, improve the venting valve effect.
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