Common Types and Applications of Industrial Globe Valves
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Globe valves are a crucial type of fluid control device, primarily designed to achieve the shut-off, regulation, and throttling of media. The distinctive design features of a globe valve include the alignment of the valve stem's axis perpendicular to the sealing surface of the valve seat, and a relatively short travel distance for the valve stem's opening and closing movement. This design ensures that when the valve is open, the sealing surfaces of the valve seat and disc no longer make contact, thereby reducing mechanical wear and providing higher sealing reliability.
Common Types of Globe Valves
The design of globe valves plays a significant role in fluid control, mainly for shut-off, regulation, and throttling. Here are some common types of globe valves and their characteristics:
1. Plunger Globe Valve
The plunger globe valve is a variation of the standard globe valve, employing the plunger principle. The valve disc is connected to the valve stem, and sealing is achieved through the elastic sealing ring on the plunger. This design makes the plunger globe valve highly reliable during opening and closing, suitable for applications with a high frequency of valve operation. The sealing ring of the plunger globe valve is replaceable and can be made from various materials, enhancing the applicability and durability of the valve. Although its primary use is for opening and closing, with specially designed plungers and sleeves, plunger globe valves can also be used for flow regulation.
2. Straight Flow Globe Valve
The straight-flow globe valve, also known as the Y-type globe valve, is designed with the valve body's flow channel at an angle to the main flow path. This design reduces the flow resistance when the fluid passes through the valve, thereby reducing pressure loss. The Y-type globe valve is particularly suitable for applications with low flow resistance requirements due to its flow-optimized design. Its design minimizes the degree of fluid disruption when flowing through the valve, ensuring efficient operation of the system.
3. Angle Globe Valve
The fluid in an angle globe valve only needs to change direction once, reducing the pressure drop during the flow process. This design makes the angle globe valve excellent for applications where pressure loss needs to be minimized. Its simple flow direction change makes the angle globe valve suitable for pipeline systems that require optimized fluid flow.
Application Scenarios
The extensive application of globe valves spans multiple industrial fields. Depending on specific needs and working environments, the appropriate type of globe valve can be selected to meet particular requirements.
1. High-Temperature, High-Pressure Media
In high-temperature, high-pressure environments such as thermal power plants, nuclear power stations, and petrochemical systems, globe valves provide stable control performance. These applications require globe valves capable of withstanding extreme working conditions, such as high-temperature, high-pressure plug globe valves or high-pressure angle globe valves, to ensure the safety and stability of the system.
2. Low Flow Resistance Requirements
For pipeline systems with less stringent flow resistance requirements, the straight-flow globe valve (Y-type globe valve) is an ideal choice. Its flow channel design effectively reduces flow resistance, allowing for lower pressure loss in these systems, suitable for applications with high fluid flow requirements.
3. Small Valve Applications
In small pipelines and equipment, such as instrument valves and sampling valves, small globe valves are applicable. Plug globe valves and other small valves can provide precise fluid control in these scenarios, meeting the needs of small-diameter pipelines.
4. Flow or Pressure Regulation
In systems where the precision of regulation is not highly demanded and the pipeline diameter is small, plug globe valves or angle globe valves are suitable choices. These valves can effectively regulate flow or pressure, ensuring stable operation of the system.
5. Synthetic Industrial Production
In synthetic industrial production, such as small-scale and large-scale fertilizer production in high-pressure environments, selecting high-pressure angle globe valves (nominal pressure PN160 or PN320) can meet the requirements for high-pressure flow control. These valves are suitable for fluid control under high-pressure conditions, ensuring the stability and efficiency of the production process.
6. Bauxite Production
In the desiliconization workshop of the Bayer process in alumina production or on pipelines prone to coking, selecting straight-flow globe valves (with a body-separated design, replaceable valve seats, and hard alloy sealing pairs) can handle special working conditions. These design features enable the valve to deal with coking media, maintaining efficient operation of the system.
In conclusion, globe valves, with their versatile designs and reliable performance, play a critical role in the smooth operation of various industrial processes. By understanding the unique features and appropriate applications of different types of globe valves, you can optimize your system's efficiency and reliability. Whether you're managing high-temperature and high-pressure environments, reducing flow resistance, or requiring precise control in smaller pipelines, selecting the right globe valve is essential. This careful selection ensures long-term stability, safety, and effectiveness in your fluid control systems across diverse industrial applications.
