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COVNA Industrial Automation Co., Ltd. was established in 2000, an automated valve specialist. Headquartered in Dongguan China, with 3 production bases located in Ningbo, Wenzhou and Dongguan.
We Provide Electric Valve，Solenoid Valve，Pneumatic Valve，Electric Gate Valve，Electric Butterfly Valve，Pneumatic Control Valve，Motorized Valve，Pneumatic Knife Gate Valve，Control Valve Pneumatic，Pneumatic Actuated Valve，Motorized Operated Valve，Electric Ball Valve，Electric Actuated Ball Valve，Ball Valve，Gate Valve，Gate Valve，Butterfly Valve，Globe Valve，etc, You can browse related products and initiate consultations on our website.
There are two types of electric valves. One is the quarter-stroke electric valve: the quarter-stroke electric actuator is used in conjunction with the quarter-stroke valve to realize the internal rotation of the valve within 90 degrees to control the on-off of the pipeline fluid; the other is the straight-stroke electric valve: The straight-stroke electric actuator is used in conjunction with the straight-stroke valve to realize the up and down movement of the valve plate to control the on-off of the pipeline fluid. It is usually used in conjunction with equipment with a higher degree of automation.
Electric valve: It is used to adjust the analog quantity of the pipe medium flow of liquid, gas and wind system. It is AO control. In the control of large valves and wind systems, electric valves can also be used for two-position switch control.
Electric valves are generally driven by motors, which are more resistant to voltage shocks. Solenoid valves are quick-opening and quick-closing. They are generally used in places where small flow and low pressure require high switching frequency; electric valves are the opposite. The opening degree of the electric valve valve can be controlled, and the state is open, closed, half-open and half-closed, which can control the flow of the medium in the pipeline, but the solenoid valve cannot meet this requirement.
Advantages: It has a good effect on liquid media and large pipe diameter gases, and is not affected by the weather. Not affected by air pressure.
Disadvantages: high cost, not good in humid environment.
The workmanship is in place, and the quality is very good at a glance!
Regular customers, the cooperation has been very happy!
The workmanship is fine, the size is right, the design is in place, and the service is attentive and attentive!
Compared to their pneumatic and hydraulic counterparts, electric valve actuators provide a more energy-efficient, clean, and quiet method of valve control. They can be bought together with the valve as a package or as a separate unit and added onto an existing quarter-turn valve.
Electric valves generally have a large pipe diameter and are used to control the flow, cut-off, flow, pressure, etc. of fluids. The ones that perform flow and cut-off control are called electric on-off valves (some can only be opened or closed, and some can be stopped in the middle. There is a general adjustment, such as 25%, 50%, 75%, 100%). The flow and pressure control are called electric control valves, what are electric ball valves, electric disc valves, and what are called smart control valves. Are actually electric valves
There are three states of on/off/stop. The solenoid valve used for the on-off valve is the electric control valve for regulation. There are two types of electric actuators, one is to use contacts to control in three positions, open, close, and stop, the other is that the electric actuator is controlled by a 4-20MA current signal to achieve continuous adjustment!