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.

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What users say about COVNA

The workmanship is in place, and the quality is very good at a glance!

Leo

Regular customers, the cooperation has been very happy!

Worlds

The workmanship is fine, the size is right, the design is in place, and the service is attentive and attentive!

Kepler

Do you have any questions?

What is a ball valve?

Ball valves are valves which permit or halt the flow of media through a pipeline. A typical ball valve includes an inlet, outlet, and a housing for the valve itself, which is commonly a spherical shape and hollow. A stem--which fits snuggly into a slot at the top of the ball--rotates the ball to an open or closed position.

The ball valve is composed of those structures

The ball valve is composed of valve body, sphere, valve seat, valve stem, bracket and driving device.

Principle of ball valve

The working principle of the ball valve is to make the valve unblocked or blocked by rotating the valve. The ball valve switch is light and small, can be made into a large diameter, reliable sealing, simple structure, convenient maintenance, the sealing surface and the spherical surface are often closed, and it is not easy to be eroded by the medium. It is widely used in various industries.

Our updates and blog posts

23 Dec

ball-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.

23 Dec

ball-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.

08 Jan

ball-valve | Gate valve movement

{keyword},Most gate valves are forcibly sealed, that is, when the valve is closed, the gate must be forced against the valve seat by external force to ensure the tightness of the sealing surface.

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