Stick to the spirit of ingenuity CNC precision machining 20 years of technical engineer guidance
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Torque up to 4678nm Senior technical guide selection Special customization according to customer needs
ISO9001 international certification Adhere to standardized production processes 1 million cycles durability test
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.
1) Bypass valve: The ball valve is generally opened by static water, so the bypass valve is set to be flat pressure first, that is, both sides are filled with water;
2) Air valve: when filling with water, the buoy will automatically close the valve when the air is removed; when draining, the buoy will drop by itself when it is used for replenishing air;
3) Pressure relief valve: when opening and closing the valve, remove the pressure water between the valve and the sealing cover to avoid wearing the sealing cover;
4) Sewage valve: drain the sewage in the lower part of the ball shell.
1) Pneumatic ball valve
2) Electric ball valve
3) Hydraulic ball valve
4), Pneumatic-hydraulic ball valve
5) Electro-hydraulic ball valve
6) Turbine drive ball valve
Because the hard-sealed ball valve is manually ground, it cannot be used until the valve core and the sealing ring are completely matched. Therefore, its sealing performance is reliable.
Since the valve core of the hard-sealed ball valve is spray welded with alloy steel, and the sealing ring is welded with alloy steel, the hard-sealed ball valve will not produce too much wear when it is switched on and off.
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!
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 valve body, sphere, valve seat, valve stem, bracket and driving device.
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.