Next, let’s talk about several operating procedures for knife gate valves.

Release time:

2023-05-11

When a gate valve is closed, the sealing surfaces rely solely on the pressure of the medium to achieve a seal—specifically, the sealing surface of the gate is pressed against the valve seat on the opposite side by the medium’s pressure, thereby ensuring a tight seal. This type of sealing is known as self-sealing. In contrast, most gate valves employ forced sealing: when the valve is closed, an external force must be applied to press the gate against the valve seat in order to guarantee the sealing performance of the sealing surfaces. Such valves should be installed vertically in the pipeline.

　　Several operating procedures for knife gate valves

　　When a gate valve is closed, the sealing surfaces rely solely on the pressure of the medium to achieve a seal—specifically, the sealing surface of the gate is pressed against the valve seat on the opposite side by the medium’s pressure, thereby ensuring a tight seal. This type of sealing is known as self-sealing. By contrast, most gate valves employ forced sealing: when the valve is closed, an external force is used to press the gate against the valve seat, guaranteeing the sealing performance of the sealing surfaces. Such valves should be installed vertically in the pipeline.

　　Performance

　　1. The valve can be locally and remotely controlled according to user requirements, and can also provide remote and centralized display.

　　2. Lightweight: The valve body is made of carbon steel, making it approximately 20%–30% lighter than conventional gate valves, which facilitates installation and maintenance.

　　3. Using this type of valve can enhance the sealing performance of pipeline systems, minimizing leaks to the greatest extent possible, thereby playing a positive role in improving production efficiency and protecting the environment.

　　4. The sealing surface is designed with a highly wear-resistant and corrosion-resistant ceramic composite material, using an inlaid technology. This results in superior corrosion resistance and excellent wear resistance, significantly extending the service life of China’s valves and increasing their cost-effectiveness by a factor of 10 compared to conventional valves.

　　Why does the resistance of a gate valve change?

　　1. Gate valve

　　Also, the gate valve used for introducing household gas into cylinders—whose standard name is “Chinese Household Bottle-Loaded Imported Liquefied Petroleum Gas Pressure Regulator”—is widely used in countless households across society and is closely linked to our personal safety. By adjusting the inlet pressure, the gate valve reduces the outlet pressure to a certain extent, and it relies on the energy of the medium itself to automatically maintain a stable outlet pressure.

　　From the perspective of fluid mechanics, a gate valve is a throttling element with variable local resistance—by adjusting the throttling area, one can change the fluid flow rate and kinetic energy, thereby generating different pressure losses and achieving the purpose of pressure reduction.

　　2. Function of the gate valve

　　A gate valve is a type of valve that automatically maintains a stable outlet pressure by adjusting the inlet pressure to a desired outlet pressure, relying on the energy inherent in the medium itself. From the perspective of fluid mechanics, a safety valve is a throttling element whose local resistance can be varied—by changing the throttling area, the flow rate and kinetic energy of the fluid are altered, resulting in different pressure losses and thus achieving the purpose of reducing stress.

　　3. Classification of Knife Gate Valves

　　The pressure inside the cylinder is very high. If the cylinder were connected directly to the stove, the stove’s flame would initially burn unevenly. Second, connecting high-pressure gas directly to the stove would easily lead to gas leaks during combustion. Third, a large volume of gas rushing out would produce a powerful flame, resulting in significant energy waste (a large flame isn’t necessary for household gas use). Moreover, incompletely burned gas can be harmful to human health.

　　4. The gate valve has high pressure and large flow rate; when liquefied gas is released into the air, it does not produce any sparks, but over time, this can seriously lead to the explosion of the liquefied gas cylinder.

　　Everyone must pay attention: For household gas stoves, use the JYT-0.6 knife gate valve. The pressure for imported products is 1.56 MPa, while the pressure in export markets is 2800 Pa and 500 Pa. This is a controllable, adjustable knife gate valve.

　　The company is committed to specializing in blade gate valve products and implements quality management policies such as “No substandard blanks enter the factory, no non-standard components are assembled, and no products failing to meet specifications leave the premises,” thereby alleviating customers’ concerns and worries.

The vast majority of stainless steel knife gate valves employ forced sealing: that is, when the valve is closed, an external force is applied to forcibly press the gate against the high-pressure valve seat, thereby ensuring a tight seal on the sealing surfaces. Some gates can also be designed to undergo slight deformation, which helps improve their manufacturability and compensate for any misalignment in the sealing surface angles that may occur during the manufacturing process. Such gates are referred to as flexible gates. The majority of knife gate valves rely on forced sealing—meaning that when the valve is closed, an external force is used to press the gate firmly against the high-pressure valve seat, thus guaranteeing a secure seal on the sealing surfaces. Valves of this type are generally installed horizontally in pipelines.

2023-05-11

Next, let’s talk about several operating procedures for knife gate valves.

2023-05-11

Next, let’s talk about whether knife gate valves have fire-resistant and anti-static requirements.

When an electrostatic knife gate valve is opened or closed, the sphere and the valve seat experience mutual friction. The static electricity generated by this friction tends to accumulate on the sphere—something that is unacceptable for ball valves used in gas, fuel, and chemical pipelines, as it could potentially lead to pipeline explosions. Ball valves with antistatic designs are equipped with static discharge devices.

2023-05-11

Next, let’s talk about some important considerations for the installation, operation, and maintenance of pneumatic knife gate valves.

Pneumatic knife gate valves have a wide range of applications, spanning from ordinary fields to more diverse industries—from coal preparation, gangue removal, and slag discharge in coal-fired power plants to urban wastewater treatment; from general industrial pipelines to pipeline systems used in food, sanitation, and pharmaceutical industries. So, what are the key considerations when installing, using, and maintaining pneumatic knife gate valves?

2023-05-11

Slurry Valve Manufacturer: How are stainless steel knife gate valves good?

Slurry valve manufacturer: How to improve the compliance rate and productivity of stainless steel gate valves and prevent a large number of maintenance tasks—this is Skafu Valve’s top priority. The stainless steel gate plate effectively prevents sealing leaks caused by corrosion. The stainless steel gate plate effectively prevents sealing leaks caused by corrosion. Features: This valve boasts advantages such as simple and compact structure, reasonable design, lightweight and material-saving, reliable sealing, easy and flexible operation, small size, smooth flow passage, low fluid density, light weight, ease of installation, and ease of disassembly.