Knife Gate Valve

The knife gate valve produced by Lianggu valve Co., Ltd. is widely used in coal, filter residue slurry, waste water, mud, dirt, paper pulp, ash residue slurry, etc. Knife gate valve, also known as knife gate valve, is a knife-type slurry valve. Its opening and closing part is a gate. The movement direction of the gate is perpendicular to the direction of the fluid. The medium is cut by a blade-shaped gate that can cut fiber materials. The gate has Two sealing surfaces, the most commonly used mode gate valve, the two sealing surfaces form a wedge, and the wedge angle varies with the valve parameters, usually 50, the wedge knife gate valve gate can be made into a whole, called a rigid gate; Can also be made into a gate that can produce a small amount of deformation to improve its manufacturability and make up for the deviation of the sealing surface angle during processing. This kind of gate is called an elastic gate. The valve body does not actually have a cavity, and the gate moves up and down in the side guide groove, and is pressed against the valve seat by the lug at the bottom. If you need to achieve a higher medium tightness, you can use an O-shaped seat Two-way seal. The knife gate valve has a small installation space, low working pressure, difficult to accumulate debris, and low price.

Drive Method

Manual, sprocket, electric, pneumatic, hydraulic, bevel gear, electronically controlled hydraulic and gas hydraulic drive. Knife gate valve shape: bright rod and dark rod. Knife gate valve material: cast iron, cast steel, carbon steel, stainless steel, fluorine lining, etc. Knife gate valve seal: hard seal, soft seal, single side seal, double side seal and other material seals.

Product Performance

Features
1. The lifting type sealing surface of the gate can scrape off the adhesion on the sealing surface and automatically clean up the debris.
2. The stainless steel gate can prevent seal leakage caused by corrosion.
3. The hard all-gold sealing surface can ensure the sealing wear resistance and requirements.
4. There is no groove on the sealing surface of the valve body, and no deposit is generated, which can ensure flexible opening.
5. Short structure length can save raw materials, install space and effectively support pipeline strength.
6. The scientific upper seal stuffing box design makes the upper seal safe and effective and durable.
7. The triangular bracket saves raw materials and guarantees the required mechanical properties.
8. The guide block on the valve body allows the gate to move correctly, and the four squeeze blocks ensure the gate is effectively sealed.
9. The valve body rib design improves the strength of the valve body.
10. The stainless steel stem is durable and the double-headed bolt makes opening and closing more quickly.
11. The drive mechanism can be selected at will.
12. With a caliber of over 150, a fully enclosed structure is used to effectively open and prevent leakage.
13. Fluorine rubber sealing surface can achieve the sealing effect and increase the use temperature.
14. The rubber sealing surface is directly vulcanized in the valve body without falling off.

Installation and use instructions

Use and Maintenance

1. The handwheel, handle and transmission mechanism are not allowed to be used for lifting, and collision is strictly prohibited.
2. The double gate valve should be installed vertically (ie, the stem is in the vertical position and the handwheel is at the top).
3. The gate valve with a bypass valve should be opened before opening (to balance the pressure difference between the inlet and outlet and reduce the opening force).
4. The gate valve with transmission mechanism shall be installed in accordance with the provisions of the product instruction manual.
5. If the valve is used frequently, lubricate it at least once a month.

The main shape and connection dimensions

Structure picture