Plug Valve of faucet a powerful person: Serve as with the put oneself in another's position of a place of strategic importance that takes via open shut valve. Body of a place of strategic importance lets roll of lever of a powerful person, open in order to come true close an act. Small-sized the faucet a powerful person that does not have filling calls “ to take an examination of gram ” again. The body of a place of strategic importance of faucet a powerful person is cone more (also have cylinder) , cooperate to comprise with the conic aperture face of body of a powerful person sealed deputy. Faucet a powerful person is to use a kind of the earliest valve, structure simple, switch resistance of rapid, fluid is little. The direct contact between the metallic stuff body that common faucet a powerful person leans finish machining and body of a powerful person comes sealed, sealing is so poorer, open shut muscularity, wear away easily, can use at only normally low (not prep above 1 million handkerchief) and small-bore (be less than 100 millimeter) circumstance. To enlarge the applied limits of faucet a powerful person, already developed an a lot of new-style structures. Oil-lubricated faucet a powerful person is the most important a kind (see a picture [oil-lubricated faucet a powerful person] ) . Tailor-made grease from top of body of a place of strategic importance between taper hole of body of infuse a powerful person and body of a place of strategic importance, form oily film to be opened in order to reduce shut pitching moment, improve sealing and service life. Its actuating pressure can amount to 64 million handkerchief, top job temperature can amount to 325 ℃ , the largest requirements can amount to 600 millimeter. The passageway of faucet a powerful person has a variety of forms. Common straight general formula basically is used at cutting off a fluid. With faucet of 4 general formula a powerful person applies to a powerful person of fluid inverting faucet 3 open shut it is cylinder of a poriferous, circle perpendicular rotate at the axes of the passageway, achieve thereby start the end that closes a passageway. Faucet a powerful person basically is offerred open is used with what shut conduit and equipment medium. Faucet a powerful person is main the advantage is as follows: 1, apply to often operate, open shut rapid, light. 2, fluid resistance is little. 3, the structure is simple, opposite volume is minor, weight is light, facilitating maintenance. 4, sealed performance is good 5, the limitation that does not get installation way, the flow direction of medium but random. 6, without vibration, noise is little. Faucet a powerful person can be divided by configuration mix for a powerful person of faucet of type of a powerful person of faucet of a powerful person of close formulary faucet, self-given type, packing a powerful person of oiling type faucet 4 kinds. Press passageway form cent, can divide mix for straight general formula, 3 general formula 4 general formula 3 kinds.
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