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electric gate valve small science popularization
release time:2018/8/25
the electric valve simply means that the valve is controlled by electric actuators, so as to realize the opening and closing of valves. it can be divided into two parts: the upper part and the lower part, the electric actuator, and the lower part of the valve. the action force distance is bigger than the electric valve, the action speed of the switch of the electric gate valve can be adjusted, the structure is simple, easy to maintain, the cushioning characteristic of the gas itself is not easy to be damaged because of stuck, but there must be an air source, and the control system is more complex than the electric valve. electric gate valves are sensitive, safe and reliable, and many plants with high control requirements set up compressed air stations for pneumatic instrument control components. an electric device is a device that requires electricity and controls its flow.
structural characteristics of electric gate valves
(1) the valve adopts self sealing pressure or sealing structure of valve body and gasket gasket. it is reliable. it is safe and reliable.
the valve disc adopts the structure of double gate with universal roof in the middle, which can automatically adjust the coincidence between the disc and the sealing surface of the valve seat to ensure the sealing of the valve. at the same time, the structure is easy to maintain and save cost, and the valve flap has better interchangeability.
the sealing surface of disc and seat is made of cobalt chromium tungsten carbide by plasma spray welding. the sealing surface has high hardness, abrasion resistance, abrasion resistance and long service life.
the valve stem is made of nitrided steel with high hardness, abrasion resistance, corrosion resistance and long service life.
the electric device is equipped with torque control mechanism, field operation mechanism and hand and electric switching mechanism. in addition to local operation, it can also carry out remote operation, plc control, 4 ~ 20 ma current input and output intelligent control.
manual valves are opened by manual or impact handwheels. reduce valve operation force.
valves can be installed in any position in the pipeline, and according to the medium and medium temperature selection of carbon steel or alloy steel valves.
_in the initial installation and commissioning, the valve must be manually opened to about half of the position, in order to avoid motor sequential connection lead to valve or installation damage.
structural characteristics of electric gate valves
(1) the valve adopts self sealing pressure or sealing structure of valve body and gasket gasket. it is reliable. it is safe and reliable.
the valve disc adopts the structure of double gate with universal roof in the middle, which can automatically adjust the coincidence between the disc and the sealing surface of the valve seat to ensure the sealing of the valve. at the same time, the structure is easy to maintain and save cost, and the valve flap has better interchangeability.
the sealing surface of disc and seat is made of cobalt chromium tungsten carbide by plasma spray welding. the sealing surface has high hardness, abrasion resistance, abrasion resistance and long service life.
the valve stem is made of nitrided steel with high hardness, abrasion resistance, corrosion resistance and long service life.
the electric device is equipped with torque control mechanism, field operation mechanism and hand and electric switching mechanism. in addition to local operation, it can also carry out remote operation, plc control, 4 ~ 20 ma current input and output intelligent control.
manual valves are opened by manual or impact handwheels. reduce valve operation force.
valves can be installed in any position in the pipeline, and according to the medium and medium temperature selection of carbon steel or alloy steel valves.
_in the initial installation and commissioning, the valve must be manually opened to about half of the position, in order to avoid motor sequential connection lead to valve or installation damage.