Sealing effect of sealing ring of large flange and affecting its performance factors
The sealing ring of the large flange in the opposite direction of the working pressure, produce the self-sealing force, increase the sealing specific pressure, the seal ring presses the valve seat, the greater the working pressure in the opposite direction, the greater the self-sealing force, so that the sealing ring and the valve seat combined tightly, to achieve the effect of two-way sealing. Large flanges according to the different levels of pressure.Large flange sealing valve flap rigidity is good, not easy to deform the butterfly valve valve above DN300 is a double plate truss circulation structure, small flow resistance, good rigidity, in the opposite direction of the working pressure, not easy to deform, so that the sealing ring will not deform with the valve seat sealing point, so as to ensure the sealing effect of the sealing ring. In large flange consumption, there are many performance factors affecting large flange. The first is the annealing temperature, the temperature parameter of primer and template separation. In the ideal state, the annealing temperature is low enough to ensure that the primer is of the same purpose sequence, and also high enough to reduce non-specific separation. Reasonable annealing temperatures ranged from 55℃ to 70℃. The annealing temperature was normally set at 5℃ lower than the Tm of the primer. Can the regular temperature be reached. Large flange disposal is generally a solid-soluble heat disposal, which is commonly known as "annealing", with a temperature range of 1,040 to 1,120℃. You can also pass through the annealing furnace inspection. The large flange fittings in the annealing area should be incandescent, but not softened and drooping. The second is the furnace body sealing, the inspection method can be used with soapy water in the gap of each joint, to see whether the gas; the center of the furnace into the tube and out of the pipe.
