DMZ73W-10P stainless steel concealed stem knife type gate valve

Product Introduction:

This knife shaped gate valve is a new variety of gate valves, with small volume, light weight, and lightweight materials. It is an ideal product for industries such as sewage, coal slurry, syrup, mud, air, slag water mixture, water supply, papermaking, mining, etc.

Knife gate valves use metal to metal hard seals or metal to rubber soft seals. During the opening and closing process, the gate and sealing surface are designed with special features, resulting in minimal friction and durability.

The upper seal of this type of knife shaped gate breaks through the conventional sealing form by adopting an upper cover structure, which changes the upper seal from a large rectangular seal to a small circular seal, greatly improving the sealing performance. On the basis of the circular seal, the advanced floating seal currently used internationally has been replaced with an area based circular seal, greatly improving the sealing performance. On the basis of circular sealing, the advanced floating sealing structure currently used internationally has been adopted, which enables the upper seal to reach the same lifespan as the pipeline, thereby improving the overall service life of the valve.

After installing a sealing device on the top of the handwheel, this type of gate valve can keep all the moving parts of the valve in a closed state, and the screw drive of the gate and valve stem will not get stuck due to dry lubricating oil.

Especially suitable for long-term normal operation in harsh environments with dust and dryness. Note: It can be designed and produced according to the environment and requirements of the user, suitable for installation and use by the user.

Precautions and their characteristics:

The opening and closing component of a knife gate valve is a gate plate, and the direction of movement of the gate plate is perpendicular to the direction of the fluid. Knife gate valves can only be fully opened and fully closed, and cannot be adjusted or throttled. The gate valve has two sealing surfaces, and the two sealing surfaces of the commonly used mode gate valve form a wedge shape. The wedge angle varies with the valve parameters, usually 50. The gate of the wedge type knife gate valve can be made as a whole, called a rigid gate valve; It can also be made into a gate that can produce slight deformation to improve its processability and compensate for the deviation of the sealing surface angle during the processing. This type of gate is called an elastic gate knife gate valve. When the gate is closed, the sealing surface can be sealed only by the medium pressure, that is, the sealing surface of the gate is pressed against the valve seat on the other side by the medium pressure to ensure the sealing surface is sealed, which is called self sealing Most knife type gate valves use forced sealing, which means that when the valve is closed, the gate must be forcefully pressed against the valve seat by external force to ensure the sealing surface is sealed.


Product advantages:

The concealed stem knife gate valve has the advantages of simple and compact structure, reasonable design, lightweight and material saving, reliable sealing, easy and flexible operation, small volume, smooth channel, low flow resistance, light weight, easy installation and disassembly. It can work normally under working pressure of 1.0MPa-2.5MPa and operating temperature of -29-650 ℃. The blade gate valve has a shearing function on its gate plate, which can scrape off the adhesive on the sealing surface and automatically remove debris. The stainless steel gate plate can prevent sealing leakage caused by corrosion.

Knife gate valve materials: cast iron, cast steel, carbon steel, stainless steel, fluorine lining, etc. Knife gate valve sealing: hard sealing, soft sealing, single-sided sealing, double-sided sealing and other materials for sealing.

The scope of use is:

1. Mining and steel industry - used for coal, filter slurry, etc;

2. Purification device - used for wastewater, mud, dirt, and clarified water with suspended solids;

3. Paper industry - used for any concentration of pulp, feed water mixture;

4. Power plant ash removal - used for ash slurry.

Product performance:

Nominal pressure (MPa)	Shell test (MPa)	Sealing test (MPa)	Operating Temperature	Applicable Medium
1.0 1.6	1.5 2.4	1.1 1.8	≤100℃ ≤100℃	Pulp, wastewater, coal slurry, ash, slag water mixture

1. Used for near and remote control, it can also achieve remote location display and remote centralized control according to user requirements.

2. Lightweight: The body is made of carbon steel, which reduces the weight by about 20% -30% compared to traditional gate valves, making installation and maintenance convenient.

3. The use of this valve can improve the sealing performance of the conveying pipeline system, minimize leakage, and play a positive role in improving production efficiency and protecting the environment.

4. The sealing surface is made of highly wear-resistant and corrosion-resistant ceramic materials, and adopts inlay technology, which has high corrosion resistance and good wear resistance, thus making the valve have a long service life and a cost performance 10 times higher than ordinary valves.

Applicable medium:

Mining and steel industry - Knife gate valves are used for coal slurry, filter slurry, etc.

Purification device - knife gate valve is used for wastewater, mud, dirt, and clarified water with suspended solids.

Paper industry - Knife gate valves are used for any concentration of pulp, material water mixture.

Sugar industry - Knife gate valves are used for sugar beet washing, syrup, juice extraction, fruit juice, etc.

Food industry - Knife gate valves are used for washing and rinsing equipment, grain conveying equipment, malt extract, etc.

Power plant ash removal - knife gate valve is used for ash slurry.