and improve manufacturing precision machining of measures
Sealing effect is a key element of the valve manufacturer. Sealing
problem has always been difficult to solve mechanical problems
processing industry, to improve manufacturing precision valve, the valve
seal to ensure, through theoretical research and production practice,
sum up the following improvements.
Valve
body is the most critical processing production parts, because of
structural requirements, the valve seat sealing surface and the center
symmetry plane tilted 3o ~ 6o. For small gate valve body, we used
adjuvant bending horizontal lathe tooling (see Figure 2) to complete the seat tilted surface processing. But we must ensure that bending angle (3o ~ 6o) consistent with the body’s process requirements. At the same time, it should strictly ensure high machine center with high coincidence of bending tooling center. Tolerance between control 0.02mm ~ 0.04mm. In addition, the gate valve should be considered in the process once pressed, the positioning accuracy and reliability. Shown
in Figure 2, should be the main axis of the weight by turning to face
as a frame of reference, the use of curved vertical surface of the wedge
plates and wedge sliding slot will find the body is pressed flange at
one end, both sides separately processing. In
addition, the body in the process, the need to rely back on the lathe
tooling 180o rotating turntable to complete the processing of both ends
of the body cavity. Rotary
precision is distributed in turn by two symmetrical conical flange
positioning repeatability of positioning pin hole to guarantee. Transposition error is 0.01mm ~ 0.02mm. Lining Butterfly Valve
In addition, to choose the right weight and the bending plate is equipped with.

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