Use and selection of electronically controlled hydraulic knife type gate valve
**Use and Selection of Electronically Controlled Hydraulic Knife Gate Valve**
The electronically controlled hydraulic knife gate valve, also known as the electro-hydraulic knife valve or electro-hydraulic linkage thin gate valve, is a specialized type of control valve designed for handling abrasive, fibrous, and particulate-laden media. It is commonly used in industries where traditional gate valves may not perform efficiently due to the nature of the material being handled.
According to national standards, the nominal pressure ratings for these valves are 0.25MPa, 0.6MPa, 1.0MPa, 1.6MPa, and 2.5MPa. However, with increasing industrial demands, our company has developed high-pressure versions of this valve, available at 4.0MPa and 6.4MPa, utilizing a reverse sealing packing method to enhance performance under extreme conditions.
The materials used for constructing these valves include WCB (cast steel), stainless steel (304, 316, 321), and alloy steel, ensuring durability and resistance to corrosion and wear. The electric actuators are available in both explosion-proof and standard types, operating on voltages such as 380V, 415V, and 660V. Customization options are available based on specific customer requirements, including signal conditioning features for enhanced control accuracy.
The sealing mechanism of the valve includes one-way and two-way sealing configurations, with various packing materials such as silicone rubber, natural rubber, EPDM, PTFE, graphite, and high-pressure fiber wool. These materials are selected based on the application’s temperature, pressure, and media characteristics.
The valve body is available in two main structures: clip-on and flanged. The flange spacing can be fixed or customizable, depending on the user's installation needs. The blade itself is typically made from stainless steel grades like 304, 316, and 321, offering excellent mechanical strength and corrosion resistance.
To further improve performance, the internal cavity of the Qianfeng electronically controlled knife gate valve is equipped with wear-resistant ceramic linings, corrosion-resistant rubber linings, stainless steel lining, monolithic cast stone, and carbon spray coatings. These advanced internal treatments help extend the service life of the valve, especially in harsh environments.
This type of valve is widely applied across multiple industries, including coal processing, paper manufacturing, metallurgy, environmental protection, pharmaceuticals, steel production, municipal utilities, wastewater treatment, power generation, boilers, and petroleum. Its compact structure and flexible operation make it ideal for applications where other types of valves struggle to handle materials like fibers, sand, granules, sludge, and crystals.
Additionally, the Qianfeng electrically controlled hydraulic knife gate valve can easily replace conventional electrically controlled hydraulic gate valves, providing better reliability and performance in challenging environments.
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Editor: Hardware Business Network Information Center
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