Than the flange petition, save a lot of materials and labor, but also needs certain pre-tightening force, so that the pressure in the valve is not high, using reliable. cosignatory way also many, for example, some do not need to pull down the small valve, with the pipe weld together; Some non-metallic valves, think appropriate and use the socket type signatures, etc. So the way of a petition and adapted to the high pressure valve. The valve using the according to take things in specific view. Processing more convenient 2) Lenticular: office pressure is higher, can be used in hard washer (3) Mortise type: variant large plastic washers are available, and the widely used in the corrosive medium, tightly closed. 2, turnbuckle signatures this is a simple and convenient way to petition, often used for small valves. It tightly closed loop with the cone, opposite side at an Angle with media, media pressure to the inner cone, and preach to tightly closed circle, on the cone Angle, the initiation of two component, one with the core line parallel to the valve body, another pressure to the valve body wall. 。 This component is the force behind. Here recommend using medium pressure self-tightening way of signatures. Q: several kinds of common vacuum valve petition way answer: 1, flange petition is this valve is used in most ways of signatures. 6) O-ring type: this is a relatively new way of flange signatures, it is with all kinds of rubber o-ring, and progress together, it in a tightly closed effect than ordinary flat washer. 3, card sets of petition petition, recent progress in our country, it's a petition and tightly closed principle is that when tightening the screw nut, card sets of stress, the blade is biting into the tube outer wall and card sets of male cone and cone or under pressure and joint, it can validly avoid leaking. For office pressure of 100 kg/cm2 or high pressure valve, or high temperature valve. 5) Lens: washer is lens style, made of metal. So far, card sets of petition, have some small valve products in China sees fit and use. More than 5, inside the petition form of petition is external forces to eliminate each other by using medium pressure, successfully closed tight. According to the joint surface patterns and can be divided into the following kinds: 1) Smooth type: used for low pressure valve. Divides two things: 1) Tightly closed directly: direct up tightly closed turnbuckle utility inside and outside. This way of petition strengths are: 1) Large and small, light weight, simple structure, disassembling easy; 2) Petition force strong, use range wide, resistant to high pressure, 1000 kg/cm2) , high temperature ( 650℃) Impact and oscillation; 3) Can adapt a variety of materials, corrosion resistance; 4) Processing precision requirements is not high; 5) Easy to high altitude installation. 4) Ladder type slot: with duck eggs round metal ring gasket, used in the office a pressure of 64 kg/cm2 or valves, valve or high temperature. 2) Indirect tightly closed: turnbuckle tighten strength, handed over to Marine valve between two of the simplest of the gasket, let the gasket tightly closed. 4, clamp signatures this is a way to quickly petition, it just need two screws, suit to use Yu Changchang sealed, low-pressure valve. In order to guarantee a petition does not leak, often with lead, cotton and ramie thread woven and ptfe raw material belt added; The ptfe raw material belt inside, to display widely used day by day; Corrosion resistant performance is good, this material has excellent effect on tightly closed, convenient use and retain, remove, can be fully removed, it because it is a layer non-viscous film, more excellent than lead, cotton and ramie thread woven. Use since the tight tight sealing principle of the valve, is ordinary high pressure valve. The more the greater the medium pressure, since the tight force is big. Notes to the order: The national standard) A, A: B: product name, model, nominal size medium and temperature, pressure range C: whether there is attachment, delivery time, and special requirements so that we can correct selection for you. Second, if the valve has been selected by design unit of our company model, please order according to the valves parameters directly with our sales center. Three, it is very important when you use the occasion or the environment is more complex, would you please provide design drawings and detailed parameters, our engineers experts will concentrate on review and analysis for you. We can provide you with professional solutions, including design, customization, complete, operation and service. We've been working on the valve leader in the field of industry, to provide you with the latest knowledge of the Industrial Valves, the best service, best technical adviser. Thank you for visiting our website, if you have any questions, you can call us, we will be dedicated to provide you with quality services. 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