Two common connection form of vacuum pneumatic valve

live flange connection
this is the connection forms of pneumatic valve used most frequently. According to the joint surface shape can be divided into the following kinds:
smooth type: used for pneumatic valve pressure is not high. Processing more convenient.
the concave and convex type: high work pressure, can be used in the washer.
mortise type: plastic deformation is larger washers are available, and in the corrosive medium is used more widely, the sealing effect is better.
trapezoidal groove: with oval metal ring gasket, used to the work pressure of kg/cm2 or pneumatic valve, pneumatic valve or high temperature. Type:
lens gasket is lens shape, made of metal. For work pressure of kg/cm2 or high pressure pneumatic valves, pneumatic valves or high temperature.
O ring type: this is a relatively new form of flange connection, it is with the emergence of a variety of rubber o-ring, and developed, it is reliable in sealing effect than ordinary flat washer.
threaded connection
this is a simple connection method, often used for small pneumatic valves. Divides two kind of situations:
direct seal: internal and external screw thread sealing effect directly. In order to ensure that joint not leak, often filled with lead, cotton and ramie thread woven and ptfe teflon tape; The ptfe teflon tape, became more and more widely used; The corrosion resistance of the material is very good, good sealing effect, easy to use and preservation, remove, can be fully removed, it because it is a layer non-viscous film, much more superior than lead, cotton and ramie thread woven.
indirect seal: the power of the screw tight, passed between two flat washer, gasket sealing role. Flange connection

quick-release clamp will seal o-rings and pneumatic valve flange clamp, achieve better seal.