Lightweight | Pneumatic Knife Gate Valve | High Quality

Lightweight | Pneumatic Knife Gate Valve | High Quality

The valve body and packing culvert of the pneumatic knife gate valve are all precision castings. The valve body adopts flange-type integral casting. The material can be 304, 316, 316L, WCB, 2Crl3 according to user needs, and the sealing ring is made of PTFE reinforced polytetrafluoroethylene. , Corrosion resistance, wear resistance, non-stick slag.
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Exquisite craftsmanship

Exquisite craftsmanship

Stick to the spirit of ingenuity CNC precision machining 20 years of technical engineer guidance

Technological innovation

Technological innovation

High-tech foundation Insist on innovation and development Senior technical talent team

Special custom

Special custom

Torque up to 4678nm Senior technical guide selection Special customization according to customer needs

Consistent quality

Consistent quality

ISO9001 international certification Adhere to standardized production processes 1 million cycles durability test

about us

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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Product features of pneumatic knife gate valve

The valve has the advantages of convenient and quick opening, compact design, small space occupation, light weight, affordable price (compared with electric knife gate valve), easy installation, perfect wear-resistant and anti-blocking measures, easy maintenance, convenient use, and long service life. And can be loaded with handwheels according to user needs, in case the pneumatic device fails.

Pneumatic knife gate valve is widely used

Pneumatic knife gate valve is used in coal preparation, gangue discharge and slag discharge from mines and power plants. It has developed into urban sewage treatment, and has developed from general industrial pipelines to professional pipeline systems such as food, sanitation, and medicine.

Advantages of pneumatic knife gate valve

Pneumatic knife gate valve has the advantages of simple and compact structure, reasonable design, light material saving, reliable sealing, light and flexible operation, small size, smooth passage, small flow resistance, light weight, easy installation, easy disassembly, etc.

User Reviews

What users say about COVNA

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!

Frequently Asked Question

Do you have any question?

The maintenance is convenient, and the seal of the valve can be replaced without removing the valve. The temperature is generally used below 120 ℃, high temperature can also be replaced with special materials.

Compared with ordinary gate valves, knife gate valves are simple in structure, small in size, flexible in operation, easy to install, and suitable for medium with higher consistency and solid particles. The full-bore knife gate valve design allows the valve to be used under dirty conditions, and the replaceable seat and packing make the valve easy to maintain.

Knife gate valve, also known as knife gate valve, knife gate valve, slurry valve, mud valve, its opening and closing part is a gate, the direction of movement of the gate is perpendicular to the direction of the fluid, and it is cut off by a blade-shaped gate that can cut fiber materials. Medium, the gate has two sealing surfaces. The two sealing surfaces of the most commonly used mode gate valve form a wedge. The wedge angle varies with valve parameters, usually 50. The gate of the wedge knife gate valve can be made into a whole , It is called rigid gate; it can also be made into a gate that can produce slight deformation to improve its manufacturability and make up for the deviation of the sealing surface angle in the process of processing. This kind of gate is called an elastic gate. There is no cavity in the valve body. The gate is raised and lowered in the side guide groove, and is pressed against the valve seat by the lugs at the bottom. If you need to achieve a higher medium tightness, you can choose an O-shaped seal valve seat to achieve Two-way sealing. Knife gate valve has a small installation space, low working pressure, is not easy to accumulate debris, and the price is low.

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