Features
Why Choose COVNA?
Exquisite craftsmanship
Stick to the spirit of ingenuity CNC precision machining 20 years of technical engineer guidance
Technological innovation
High-tech foundation Insist on innovation and development Senior technical talent team
Special custom
Torque up to 4678nm Senior technical guide selection Special customization according to customer needs
Consistent quality
ISO9001 international certification Adhere to standardized production processes 1 million cycles durability test
We Have The Best Solutions for Your Business
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.
Electric Gate Valve Manufacturers
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.
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Frequently Asked Question
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The purpose and use of both gate and butterfly valves are same. The difference between the both valves lies in shape, size and operation. Butterfly valves are lighter than gate valves, so for the big sizes it is convenient to install and operate butterfly valve because it is lighter and compact in compare to gate valves.
Gate valves either allow or bar the passage of hydraulic fluid, and globe valves adjust the flow of hydraulic fluid between fully on and fully off. Gate valves are plate-like, and globe valves are circular.
The structure classification of electric gate valve: gate valve is generally composed of valve stem, valve body, bonnet, gate plate, driving device and other parts (fasteners, stem nut, sealing packing). The structure is introduced one by one below: Gate valve stem press The movement form is divided into the open rod (lifting shaft) and the dark rod (rotating shaft). Therefore, the gate valve is divided into two types: the open rod gate valve and the dark rod gate valve.
Our updates and blog posts
electric-gate-valve | Where the butterfly valve is applicable
{keyword},Butterfly valves are suitable for flow regulation. Since the pressure loss of the butterfly valve in the pipeline is relatively large, it is about three times that of the gate valve.
electric-gate-valve | How to choose electric butterfly valve
{keyword}.The disc of the butterfly valve is that the disc has a shaft rotating on the position of the valve seat. The angle of the rotation determines the opening and closing degree of the valve.
electric-gate-valve|How gate valve works
{keyword},We all know that the gate valve is a very widely used valve, so how does the gate valve work?