China Suppliers Factory 20inch 150LB Carbon Steel Swivel Plug Disc Globe Valve BS1873 for High-Pressure Applications
Products Specification
| Type | Globe Valve |
| Size | 20” |
| Pressure | 150LB |
| Connection | Flange End |
| Operation | Bevel Gear Box |
| Body Material | WB |
| Design Standard | BS1873 |
| FTF Dimension Standard | ASME B16.10 |
| Flange Dimension Standard | ASME B16.5 |
| Test Standard | API598 |
| Application | W.O.G |
Feature
Globe valves use a linear motion to open and close. The valve's disc or plug moves up and down on the valve stem, which controls the flow of fluid through the valve.
Globe valves are excellent for throttling and controlling flow. The design allows for precise flow regulation, making them ideal for applications where accurate flow control is necessary.
The flow path in a globe valve is typically S-shaped, with the fluid entering the valve body, passing through the valve seat, and exiting on the opposite side. This design creates a pressure drop, which helps in flow regulation.
Globe valves come in various body designs, including T-pattern, Y-pattern, and angle pattern:
- T-Pattern: The most common design, where the fluid flow changes direction within the valve.
- Y-Pattern: A less common design that offers a straighter flow path and reduced pressure drop compared to T-pattern valves.
- Angle Pattern: Changes the direction of flow by 90 degrees, useful for applications requiring a change in flow direction.
The disc (or plug) in a globe valve can be designed in different shapes, such as flat, parabolic, or needle-like, depending on the desired flow characteristics. The seat can be either integral with the body or renewable.
Globe valves provide good sealing capabilities, although not as tight as gate valves. They are effective in providing a bubble-tight shut-off when fully closed, depending on the design and material.
Globe valves can be operated manually using a handwheel or can be automated with electric, pneumatic, or hydraulic actuators. This versatility allows them to be used in various control systems.
Globe valves are designed to withstand high pressures and temperatures, making them suitable for steam systems, high-temperature fluids, and other demanding applications.
Globe valves are made from a variety of materials, including cast iron, carbon steel, stainless steel, brass, bronze, and various alloys. This allows them to be used with different fluids, including corrosive or abrasive media.
Globe valves are commonly used in applications where flow control, throttling, or frequent operation is required. This includes HVAC systems, water treatment, chemical processing, power generation, and many other industrial processes.
One of the downsides of globe valves is their relatively high pressure drop compared to other valve types, such as gate or ball valves. This is due to the tortuous path the fluid takes through the valve.
Globe valves are relatively easy to maintain and repair. The seat and disc can be accessed and replaced without removing the valve from the pipeline.
Application
Globe valves are ideal for applications requiring precise flow control and throttling. They can be adjusted to various open positions, making them suitable for regulating the flow rate of fluids.
Globe valves are commonly used in steam applications due to their ability to handle high temperatures and pressures. They are used for controlling steam flow in heating systems, steam turbines, and steam distribution networks.
In water treatment plants, globe valves are used to regulate the flow of treated water and chemicals. They are also employed in municipal water distribution systems for controlling water pressure and flow.
In heating, ventilation, and air conditioning (HVAC) systems, globe valves are used to control the flow of hot water, chilled water, and steam. They are essential for maintaining desired temperatures and flow rates in HVAC circuits.
In the oil and gas sector, globe valves are used for controlling the flow of crude oil, refined products, and natural gas. They are suitable for high-pressure applications and can handle a wide range of fluids.
Globe valves are used in chemical plants for controlling the flow of various chemicals, including corrosive and hazardous substances. Their precise control and ability to handle a wide range of temperatures make them suitable for chemical processes.
In power plants, globe valves are used in boiler feedwater systems, cooling systems, and fuel supply lines. They provide precise control over the flow of water, steam, and fuel, which is critical for efficient power generation.
Globe valves are used in the pharmaceutical and food processing industries for controlling the flow of fluids, including process water, steam, and cleaning agents. They are chosen for their ability to provide precise flow control and meet sanitary standards.
In marine environments, globe valves are used for controlling the flow of water, fuel, and other fluids on ships and offshore platforms. They are suitable for both seawater and freshwater systems.
Globe valves are used in systems where high pressures and temperatures are present, such as in industrial boilers, heat exchangers, and autoclaves.
Globe valves are used in vacuum systems to control the flow of gases. They can handle low-pressure applications and provide reliable sealing.
Globe valves are used in cryogenic applications to control the flow of extremely low-temperature fluids, such as liquid nitrogen and liquid oxygen. They are designed to handle the thermal stresses associated with cryogenic temperatures.
Globe valves are used in fuel handling systems for precise control of fuel flow, whether in pipelines, refineries, or fuel distribution networks.
Globe valves are often used in vent and drain systems to control the release of gases or liquids from vessels and pipelines.
Technical Drawing
Frequently Asked Questions
Globe valves are primarily designed for regulating, throttling, and controlling fluid flow in a pipeline. Unlike gate valves, they are highly efficient for throttling operations where precise flow adjustment is necessary.
Globe valves have a higher pressure drop because the fluid flow path through the valve body is S-shaped (tortuous). This path forces the fluid to change direction multiple times, creating resistance and resulting in a pressure loss.
They are widely applied in industries requiring precise control under high pressures and temperatures, such as steam systems, HVAC systems, oil and gas, chemical processing, power generation, and water treatment plants.
Globe valves are available in three main body designs: T-pattern (standard flow direction change), Y-pattern (straighter path with reduced pressure drop), and Angle-pattern (changes flow direction by 90 degrees).
Yes, globe valves are relatively easy to maintain and repair. In most designs, the internal parts, such as the seat and disc, can be easily accessed and replaced without completely removing the valve body from the pipeline.