Knife Gateway Valve Structure and Working Principle

Feb. 28, 2022

Knife gate valve, additionally called knife kind gate valve, is a kind of gate valve. The architectural attribute of the knife gate valve is that there is an oblique cut at the bottom of its valve plate. Like a knife edge, this knife-shaped oblique cut can conveniently cut off the medium distributing in the pipe, so that the valve can be shut without being obstructed by the tool. Below is the structure representation of the knife gate shutoff.


Knife gate valves are generally utilized in medium pipelines such as pulp, slag, coal ash, sewage, as well as chemical raw materials. They can just be totally opened up and completely closed. They are used as shut-off valves and can not be utilized for flow law. The transmission settings of the knife gate valve are hands-on, pneumatically-driven, electrical, and so on, as well as its functioning principle is also very easy. The adhering to takes the manual knife door valve as an instance to present the working concept of the knife gate valve to you.


The functioning concept of the hands-on knife gate valve is to turn the handwheel by hand to make the valve stem surge or loss, therefore driving the gate to go up as well as down to achieve the purpose of opening or shutting the valve. Transform the handwheel clockwise, eviction decreases, as well as the valve closes. Turn the handwheel counterclockwise, the gate rises, as well as the valve opens up.

Compared with the conventional gate valve, the structure of the knife gate valve is less complex, the length as well as size are smaller sized, and also it is less complicated to set up, take apart and also maintain. Knife gate valves are suitable for use in tool pipes with high consistency and solid bits. Eviction like a guillotine has a better gate splitting result, and can efficiently cut off various pollutants included in the medium in the pipeline, entirely resolving the leakage phenomenon of the standard gate valve after passing through the medium containing particulate contaminations.

Knife Gateway Valve Structure and Working Principle


Knife gate valves have extremely short architectural sizes as well as take up little room. The full-bore blade gate valve layout enables the valve to be made use of in filthy media, and the replaceable seat and also packaging additionally make valve upkeep easier.

Although the performance of the knife gate valve is far better than that of the standard gate valve, the cost of the knife gate valve is higher than that of the standard gate valve, so the knife gate valve can not completely change the traditional gate shutoff currently.


Knife gate valve installation as well as use:

1. Prior to installment, check the valve tooth cavity as well as securing surface area, and also do not permit dirt or sand to stick;

2. The bolts of each linking part must be tightened uniformly;

3. Check that the packaging components are required to be pushed snugly, not only to make sure the sealing of the packing, however also to make certain the versatile opening of eviction;

4. Before setting up the valve, the individual needs to check the valve design, link size and also pay attention to the circulation direction of the tool to make sure the uniformity with the valve demands;

5. When setting up the valve, the customer needs to reserve the required space for the valve drive;

6. The electrical wiring of the drive gadget should be carried out according to the circuit diagram;

7. The knife gate valve should be maintained regularly, and also should not be collided as well as squeezed at will, so as not to influence the sealing.


KXC Group is a professional maker of butterfly valve, gate valve, check valve, globe valve, knife gate valve, ball valve with API, JIS, hullabaloo criterion, made use of in Oil, Gas, Marine industry, Water system and also drain, fire battling, shipbuilding, water therapy as well as various other systems, with Nominal Diameter of DN50 to DN1200, NBR/EPDM/VITON, Certificates & Approvals: DNV-GL, Lloyds, DNV, BV, API, ABS, CCS. Criteria: EN 593, API609, API6D

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