The structure and application of the center line butterfly valve have the following points: 1. Adopt two-section valve stem without pin connection, simple and compact structure, extremely convenient for maintenance and disassembly (on-site disassembly);
Usage of this piston type check valve:Piston type pressure reducing valve is a valve in the body of the opening of the opening and closing of regulating the flow of medium, the medium pressure is reduced, at the same time with the aid of the role of the valve after pressure adjust the opening of open-close part, keep the valve after pressure within a certain range, under the condition of the inlet pressure changing, keep the outlet pressure within the scope of the set, protection appliances for production from then on.Such valves shall generally be installed horizontally in the pipe.
Lift type plug valve according to the sealing surface material can be divided into soft seal and hard seal two kinds. The basic principle is to make the cock rise when it is opened, and the valve can reduce the friction with the sealing surface of the valve body when the cock rotates 90 degrees to the full open process. When closing the valve, turn the cock 90 degrees to the closed position and then drop to contact the sealing surface of the valve body to seal.