Gas ball valveIt is a valve that uses a sphere with a circular channel as the opening and closing element, and the sphere rotates with the valve stem to achieve the opening and closing action. The opening and closing component of a gas ball valve is a perforated sphere that rotates around an axis perpendicular to the channel to achieve the purpose of opening and closing the channel. Gas ball valves are mainly used for opening and closing pipelines and equipment media.Four major characteristics of gas ball valve:
One; wear-resisting; Due to the alloy steel spray welding of the valve core and the alloy steel overlay welding of the sealing ring of the three piece ball valve, the hard sealed ball valve will not experience significant wear during opening and closing.
Two; Good sealing performance; Due to the fact that the sealing of the hard sealed ball valve is manually ground until the valve core matches the sealing ring *, it can only be used. So his sealing performance is reliable.
Three; Light switch; Due to the use of a spring at the bottom of the sealing ring of the hard sealed ball valve to tightly hold the sealing ring and valve core together, the switch is very light when external forces exceed the pre tightening force of the spring.
Four; Long service life: It has been widely used in various sectors such as petroleum, chemical, power generation, papermaking, atomic energy, aviation, rockets, as well as in people's daily lives.
Precautions for installation of gas ball valve:
(1) It is necessary to confirm that the pressure in the upstream and downstream pipelines of the ball valve has been relieved before proceeding with disassembly and assembly operations.
(2) Non metallic parts should be immediately removed from the cleaning agent after cleaning and should not be soaked for a long time.
(3) The bolts on the flange must be tightened symmetrically, gradually, and evenly during assembly.
(4) The cleaning agent should be compatible with the rubber parts, plastic parts, metal parts, and working media (such as gas) in the ball valve. When the working medium is gas, gasoline can be used to clean metal parts. Non metallic parts should be cleaned with purified water or alcohol.
(5) Each individual ball valve component that has been disassembled can be cleaned by immersion washing. Metal parts that have not yet decomposed can be cleaned with a clean and fine silk cloth soaked in cleaning agent (to prevent fibers from falling off and adhering to the parts). During cleaning, all grease, dirt, adhesive buildup, dust, and other substances adhering to the wall surface must be removed.
(6) When disassembling and reassembling ball valves, care must be taken to prevent damage to the sealing surfaces of the parts, especially non-metallic parts. Tools should be used when removing the O-ring.
(7) After cleaning, it is necessary to wait for the wall cleaning agent to evaporate (which can be wiped with a silk cloth that has not been soaked in cleaning agent) before assembly, but it should not be left for a long time, otherwise it will rust and be contaminated by dust.
(8) New parts also need to be cleaned thoroughly before assembly.
(9) Lubricate with grease. Lubricating grease should be compatible with the metal material, rubber parts, plastic parts, and working medium of the ball valve. When the working medium is gas, special 221 lubricating grease can be used, for example. Apply a thin layer of grease on the surface of the seal installation groove, a thin layer of grease on the rubber seal, and a thin layer of grease on the sealing and friction surfaces of the valve stem.
(10) During assembly, metal debris, fibers, grease (excluding those specified for use), dust, and other impurities, foreign objects, etc. should not be allowed to contaminate, adhere, or remain on the surface of the parts or enter the internal cavity.