Knife gate valve – the key “gate” of industrial pipeline

In the huge system of industrial production, fluid transportation and control is like the human body’s blood circulation system, vital and can not be lost. The knife gate valve, as a key control component on the industrial pipeline, silently bear the responsibility of precise control of fluid medium through the heavy responsibility, its importance is self-evident. Whether it is chemical industry, electric power, metallurgy, paper and other large industrial fields, or sewage treatment, food and beverage, pharmaceutical and other industries related to people’s livelihood, knife gate valves have become an indispensable pipeline system with its unique advantages of the “guardian” for the stable operation of industrial production and efficient development provides a solid guarantee.

Excellent Features of Knife Gate Valves

Unique gate design, cut off the medium without pressure

The bottom of the gate plate of the knife gate valve is carefully designed as a knife edge slash, this unique structure makes it in the face of solid particles or fibers in the medium, like a sharp blade, can easily cut through and achieve effective closure. When the valve is closed, the gate plate sinks, the knife-edge slanting cutter quickly cut into the medium, the fluid cut off, preventing it from continuing to flow. At the same time, this design skillfully avoids the accumulation of solid particles inside the valve, effectively prevents the valve from clogging, and ensures a smooth and unobstructed piping system. In the tailings transportation pipeline of the mine processing plant, the knife gate valve can smoothly cut off the tailings slurry containing ore particles, which guarantees the stable operation of the production process, avoids the production interruption and equipment damage caused by the valve clogging, and provides strong support for the efficient production of the enterprise.

Dual sealing surfaces safeguard against the risk of leakage

The gate is usually equipped with two sealing surfaces, commonly wedge-shaped design, the wedge angle is optimized according to the specific design of the valve and the conditions of use, generally around 50 °. This wedge-shaped double sealing surface structure, so that the valve in the closed state, sealing performance has been greatly improved, effectively reducing the risk of leakage. When the valve is closed, the two sealing surfaces and the valve seat are closely adhered to form a double sealing barrier, the medium is difficult to leak out from the seal, thus ensuring the sealing and stability of the pipeline system. In chemical production, for some toxic, harmful or flammable and explosive media, the double sealing surface design of the knife gate valve can reliably prevent the medium from leaking, safeguard the safety of the production site, avoid potential environmental pollution and safety accidents, and provide a solid guarantee for the safe production of chemical enterprises.

Wide variety of materials to suit all kinds of working conditions

Knife gate valve material selection is extremely rich, covering cast iron, carbon steel, stainless steel, fluorine lining and other types, can be accurately adapted to different media and working environment. Cast iron knife gate valve cost is low, suitable for general normal temperature and pressure media; carbon steel knife gate valve has good strength and toughness, can withstand a certain pressure and temperature, commonly used in industrial production of general fluid control; stainless steel knife gate valve has excellent corrosion resistance, in the chemical industry, pharmaceuticals, food and other media purity and sanitation requirements of the industry has been widely used; Fluorine lined material Fluorine lining material knife gate valve with its excellent corrosion resistance and chemical stability, especially suitable for strong corrosive media transportation control, such as chemical production of strong acid, strong alkali and other media. In the desalination plant, due to the strong corrosiveness of seawater, fluorine lined knife gate valve can operate stably for a long time, effectively controlling the flow of seawater and through the seawater to ensure the smooth progress of the desalination process, and play an important role in solving the problem of water shortage.

Flexible drive options to meet diverse needs

Knife gate valve drive mode is flexible, including manual, electric, pneumatic and other options to fully meet the needs of different operating environments and degree of automation. Manual drive mode operation is simple, low cost, suitable for some small pipeline system or the automation degree of the requirements of the occasion, the operator can through the handwheel to directly control the valve open and close, convenient and quick; electric drive mode with the help of the motor power, realize the valve remote control and automation operation, suitable for large industrial production lines or the convenience of operation and automation degree of the requirements of the higher place, the operator can through the button or control system remote operation of the valve, greatly improving the production efficiency and automation degree of needs. Places, the operator can through the button or control system remote operation of the valve, greatly improving the production efficiency and accuracy of the operation; pneumatic drive mode using compressed air as a power source, with a fast response time, rapid action characteristics, suitable for the valve switching speed has high requirements for the occasion, such as automated production lines on the fast switching operation. In sewage treatment plants, according to different treatment processes and equipment layout, manual, electric or pneumatic knife gate valves can be flexibly selected to achieve precise control of sewage flow, improve the efficiency and quality of sewage treatment, and contribute to environmental protection.

All-passage cleverly conceived, smooth and non-clogging material

The knife gate valve adopts a full-circle DC channel design, and this design concept ensures that there is no slag and no jamming inside the valve, so that the medium can pass through the valve smoothly. When the medium containing solid particles flows through the valve, the full aperture channel can effectively avoid the retention and accumulation of particles inside the valve, ensuring the continuous transportation of materials and reducing the maintenance costs and downtime of the pipeline system. In the fly ash conveying system of thermal power plants, the full bore design of the knife gate valve can ensure that the fly ash passes through the valve smoothly, avoiding poor conveying and equipment failure due to valve clogging, improving the efficiency of fly ash conveying, and guaranteeing the normal operation of the power plant.

Knife gate valves for a wide range of applications

The paper industry’s “right hand”

In the paper industry, knife gate valves play an indispensable role. From the transportation of raw materials to the deployment of pulp, and then to the processing of finished paper, each link is inseparable from the precise control of the knife gate valve. In the pulp production line, knife gate valves can stably control the flow and direction of the pulp to ensure that the pulp flows smoothly in the pipeline without blockage or leakage. Whether it is a low concentration of pulp or high concentration of pulp, knife gate valve can easily cope with its unique gate design can effectively cut off the fibers in the pulp, to ensure the sealing performance of the valve, to avoid the pulp leakage on the production environment caused by pollution, for the efficient production of paper enterprises to provide a strong guarantee.

Loyal Guardian in the Petrochemical Field

The petrochemical industry has very high requirements for valves, knife gate valve with its excellent performance in the field to show a strong adaptability. Petrochemical production involves a variety of high temperature, high pressure, strong corrosive chemical materials, knife gate valve of high temperature, high pressure, corrosion-resistant materials so that it can safely and reliably control the delivery of these media. In the petroleum refining process, the delivery of crude oil, a variety of chemical additives and the output of refined oil and other links, all need knife gate valve to accurately control the flow and prevent leakage. Its reliable sealing performance and stable operation performance effectively guarantee the continuity and safety of petrochemical production, avoid production accidents and environmental pollution caused by valve failure, and escort the stable operation of petrochemical enterprises.

A “strong backbone” for mining operations

Knife gate valves also play an important role in mining and processing. In mining, coal washing, mineral processing and other links, knife gate valves are widely used in coal slurry, filter slurry, ash discharge pipeline and other systems. The mining environment is harsh, and the medium contains a large number of solid particles and impurities, which cause greater wear and tear on the valve. However, knife gate valves have excellent anti-wear performance, and their sturdy gate plate and valve body can withstand the impact and friction of the medium, effectively preventing premature damage to the valve. In coal washing plants in coal mines, knife gate valves can reliably control the transport of coal slurry, ensure the smooth progress of the coal washing process, improve the quality and utilization rate of coal, and provide solid support for the production of mining enterprises.

“Safety guards” for the food industry

In the food industry, hygiene and safety are of paramount importance. The design and material selection of knife gate valves take this into full consideration and are able to meet the strict hygiene standards of the food production process. In the wastewater treatment system of food processing enterprises, knife gate valves are used to control the discharge and treatment of sewage, to ensure that sewage will not flow back into the production plant and contaminate food materials and finished products. Meanwhile, in the transportation of food raw materials and the cleaning process of processing equipment, knife gate valves can also accurately control the water flow and material transportation to ensure the hygiene and safety of food production. The non-toxic and non-polluting material it is made of complies with the relevant standards of the food industry, providing protection for consumers’ health.

Installation and maintenance points of knife gate valve

Fine preparations before installation

Before installing the knife gate valve, a series of fine preparatory work is required. First of all, the valve should be carefully inspected to check its internal cavity and sealing surface and other parts to ensure that no dirt or sand adherence, to ensure the cleanliness of the valve, to avoid impurities affecting the normal operation and sealing performance of the valve. Secondly, carefully calibrate the valve model, connection size, etc., to ensure that it is completely consistent with the requirements of field use, and pay attention to the direction of media flow, strictly in accordance with the requirements of the installation, to prevent leakage due to model discrepancies or installation errors caused by problems such as leakage. In addition, it is also necessary to reserve the necessary space for the valve drive, in order to follow up the installation and operation of the drive device, and at the same time to ensure that the operating parts are in a position that facilitates the opening and closing operation of the knife gate valve and wiring, to provide convenience for the use and maintenance of the valve. The precise operation of these links is crucial to whether the knife gate valve can play the best performance in subsequent use.

Rigorous operation in the installation

The valve installation process also requires rigorous operation. Knife gate valves generally require horizontal or vertical installation, such as double gate gate valve should be installed vertically, that is, the valve stem is in a vertical position, the handwheel at the top, in order to ensure the normal operation of the valve and sealing effect. In the connection part, each connection bolt should be tightened evenly to avoid problems such as poor sealing or damage to parts caused by uneven tightening strength of the bolt. At the same time, we should focus on checking the packing part to ensure that it is pressed moderately, not only to ensure the sealing of the packing to prevent the leakage of the medium, but also to ensure that the gate opens flexibly without affecting the normal opening and closing operation of the valve.

Key initiatives for routine maintenance

In order to extend the service life of knife gate valve, routine maintenance is indispensable. To regularly maintain the knife gate valve, clean the surface of the valve and the internal impurities, to prevent its accumulation to affect the performance of the valve. In the operation of the knife gate valve, to avoid collision and extrusion, so as not to cause damage to the valve and seal failure. In addition, the wiring of the drive device shall be carried out in strict accordance with the wiring diagram to prevent electrical failures caused by wiring errors. At the same time, it is also necessary to regularly check the lubrication of the valve, such as the valve is often switched on and off to use, at least once a month lubrication, to ensure that the flexible operation of the rotating parts, reduce wear and tear, so as to ensure that the knife gate valve’s long-term stable operation.

Choose Tianyu Valve’s knife gate valve, open a worry-free industrial fluid control journey

As a professional knife gate valve manufacturer, Tianyu Valve has many years of industry experience and a high-quality technical team dedicated to providing customers with high-quality knife gate valve products and a full range of services. Tianyu Valve’s knife gate valve adopts advanced production technology and strict quality control system to ensure that each valve has excellent quality and reliable performance. Whether in high temperature, high pressure, strong corrosion and other harsh conditions, or in the food, pharmaceutical and other industries with high requirements for health and safety, Tianyu Valve’s knife gate valves can operate stably, escorting your production process.
We are aware of the different needs of different customers, so Tianyu Valve provides customized solutions, according to your specific conditions and requirements, tailored to your knife gate valve material, specifications, drive mode and other parameters, to ensure that the valve is perfectly matched with your system. At the same time, Tianyu valve has a perfect after-sales service system, professional after-sales team is always on standby to provide you with timely and efficient technical support and maintenance services, so you have no worries.
Choose Tianyu knife gate valve, is to choose to rest assured, peace of mind and comfort. Let us work together to open a worry-free journey for your industrial fluid control, and jointly create a better future. If you have any questions or needs for knife gate valve, please feel free to contact us, Tianyu valve will be happy to serve you!