The ball valve is driven by the valve stem, and the valve of the rotation movement is used to rotate around the ball valve axis.It can also be used for the adjustment and control of fluid. Among them, the Hard -seal V -type ball valve has a strong shear force between its V -type ball core and the metal valve seat of the stacked hard alloy.The medium waiting.
What are the characteristics of the ball valve
1. Abrasion resistance; because the valve core of the hard sealing valve is alloy steel spray welding,
The three -piece ball valve sealing ring is a alloy steel pile welding, so the hard sealing ball valve will not cause too much wear when switching.(Its hardness coefficient is 65-70):
Second, the sealing performance is good; because the sealing of the hard sealing valve is artificial grinding, it can not be used until the valve core and the sealing ring are fully matched.So his sealing performance is reliable.
Third, the switch is light; because the bottom of the sealing ring of the hard sealing valve uses a spring to hold the sealing ring tightly with the valve core, the switch is very light when the external force exceeds the pre -tightening force of the spring.
Fourth, long service life: It has been widely used in various departments such as petroleum, chemical industry, power generation, papermaking, atomic energy, aviation, rockets and other departments, as well as peoples daily life.
Precautions for ball valves
(1) It is necessary to find out that the upstream and downstream pipes of the ball valve must be removed before the disassembly and decomposition operation can be performed.
(2) Non -metal parts should be taken out of the cleaning agent immediately after cleaning, and it should not be soaked for a long time.
(3) The bolt on the flange must be symmetrically, gradual, and uniformly tightened.
(4) The cleaning agent should be compatible with the rubber parts, plastic parts, metal parts, and working medium (such as gas) in the ball valve.When the working medium is gas, you can clean the metal parts with gasoline (GB484-89).Non -metal parts are cleaned with pure water or alcohol.
(5) Each single ball valve parts that decompose can be cleaned by immersion.The metal parts of the non -decomposed non -metal parts can be scrubbed with a clean and finely impregnated silk cloth (to avoid fibrous fibrosis from falling on the parts).When cleaning, all the oil, dirt, stagnation, dust, etc. that adhere to the wall must be removed.
(6) When the ball valve is decomposed and re -assembled, you must carefully prevent the cover of the damage parts, especially the non -metal parts. Special tools should be used when removing the O -type circle.
(7) After cleaning, it is necessary to be equipped with the fabric of the Waefanic cleaning agent (the silk cloth that can be soaked with an immersive washing agent), but it must not be put on hold for a long time, otherwise it will rust and be polluted by dust.
(8) New parts need to be cleaned before assembly.
(9) Use lubricating fat lubrication.Lubricating lipids should be compatible with the metal material, rubber parts, plastic parts and working medium of the ball valve.When the working medium is gas, it can be used for example, such as Special 221.Apply a thin layer of lubricating fat on the surface of the sealing slot, apply a thin layer of fat on the rubber sealing part, and apply a thin layer of lubricating fat on the cover of the valve stem and the friction surface.
(10) Metal debris, fiber, oil (except the specified) dust and other impurities, foreign matter such as metal debris, fiber, oil (except specified) should be allowed to, adhesion or stay on the surface of the parts or enter the inner cavity.

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