Most working conditions in the power industry require the test pressure to be 50psi (0.35MPa), because under these working conditions, the pressure acting on the valve opening and closing parts is generally much higher than 50psi (0.35MPa). In addition, it should be noted that the actuator should be adjusted to the maximum closing thrust condition, and sufficient time should be required to stabilize the flow of leakage medium, and appropriate measurement methods should be taken.

Working principle, The telescopic hose 13 is clamped into the inner cavity of the coupling 6 through a triangular clamp block 14. The coupling flange 7 can rotate on the coupling 6 through the matching slider 701 and the chute 601. When the coupling flange 7 rotates, it will drive the internal thread interface 8 to rotate at the same time. The coupling flange 7 can match the external thread interface 12 on the fixed flange 11 through the internal thread interface 8.
Although the embodiments of this invention have been shown and described, ordinary technicians in the field of skill can understand that they can make various changes, amendments, exchanges and modifications to these embodiments without departing from the principle and body of this invention. The scope of this invention is limited by the appended claims and their equivalents. Cutting and installation of a pressure resistant pneumatic butterfly valve
Cutting and installation of pressure resistant pneumatic butterfly valve belongs to the technical category of pneumatic butterfly valve cutting tools
The pneumatic butterfly valve is an important component in the connecting pipeline of modern industrial equipment. The pneumatic butterfly valve is used as the wire and cable maintenance pipe and civil shower hose for wires, cables, automatic instrument signals, with specifications ranging from 3mm to 150mm. However, in practical application, we can still find shortcomings. As we all know, pneumatic butterfly valves are produced in batches and bundles. In practical application, operators need to stop intercepting and stopping using pneumatic butterfly valves according to practical conditions, which touches on the cutting of pneumatic butterfly valves. The two ends of pneumatic butterfly valves are open and cross each other, In the process of cutting the pneumatic butterfly valve, it is easy to form deformation of the cutting mouth, and the metal material makes it difficult to restore the deformed incision to the original identical structure. Therefore, the existing technology has brought about port deformation problems for cutting the pneumatic butterfly valve, which will affect the practical application of the intercepted pneumatic butterfly valve.