Gate valve is a common type of valve, mainly used to control the opening and closing of fluids. Gate valves have many different classifications and distinctions depending on the design, structure and application. Here are some of the main ways to distinguish:
1. Classification by structural form
Parallel gate valve: It has two parallel valve plates. When the valve is fully open, the gap between the two valve plates allows the fluid to flow freely. This structure is mainly used for liquid flow control.
Wedge gate valve: The valve plate is wedge-shaped and suitable for higher pressures and temperatures. Wedge gate valves are commonly used in industrial fields such as petroleum and chemical industry.
2. Classification by opening and closing method
Manual gate valve: Open and close operation is performed by handwheel or handle. Suitable for occasions that do not require frequent operation.
Electric gate valve: Equipped with electric actuator, the valve is driven to open and close by electricity. Suitable for automatic control systems.
Pneumatic gate valve: Equipped with pneumatic actuator, the valve is driven to open and close by air pressure. Suitable for gas or occasions that require rapid opening and closing.
Hydraulic gate valve: The valve is driven to open and close by hydraulic pressure, suitable for liquid control and large flow occasions.
3. Classification by connection method
Flange connection gate valve: The two ends of the valve are connected by flanges, which is convenient for installation and disassembly.
Threaded connection gate valve: It is connected by threads and is suitable for small valves or low-pressure systems.
Welded connection gate valve: It is connected by welding and is suitable for high temperature, high pressure and occasions requiring good sealing.
4. Classification by material
Carbon steel gate valve: It is used in medium and low pressure occasions, such as water, steam, etc.
Stainless steel gate valve: It is corrosion-resistant and suitable for chemical, food and pharmaceutical industries.
Cast iron gate valve: It is economical and practical, suitable for general occasions such as water supply and drainage.
Alloy steel gate valve: It is used for high temperature, high pressure and strong corrosion conditions.
5. Classification by valve body form
Integral gate valve: The valve body is a whole, with a compact structure, suitable for small and medium-sized flow control.
Split gate valve: The valve body is divided into multiple parts, suitable for large flow and high pressure occasions, and easy to maintain and replace parts.
6. Classification by valve use
Stop gate valve: It is mainly used for precise control of fluid flow.
Isolation gate valve: used to isolate fluid pipelines, often used to disconnect the flow of fluid during inspection or maintenance.
7. Classification by drive mode
Manual drive: manual operation, suitable for occasions requiring less operation.
Electric drive: driven by a motor, suitable for automatic control systems.
Pneumatic drive: driven by a pneumatic device, suitable for occasions with frequent switching.
Hydraulic drive: driven by a hydraulic device, suitable for occasions requiring high torque.
These distinctions can help you choose the right gate valve to meet specific application requirements. If you have specific application or working condition requirements, you can also consult professionals to ensure the accuracy of the selection.
Our knife gate valves and metallurgical valves are widely used in infrastructure construction, such as mud, ore pulp, paper pulp, and smoke exhaust pipelines operating mode. We have supplied products to the central state-owned enterprises such as China Railway Group and China Electronics Technology Group. In the overseas market, we have supplied products to Emerson and other Big name enterprises.
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