What is Globe Valve?
A globe valve is a type of linear-motion valve used for regulating, starting, and stopping the flow of a fluid in a pipeline. It gets its name from the shape of its body, which is globular or cylindrical. Globe valves are commonly used in various industries, including oil and gas, petrochemical, water treatment, and manufacturing.
The main components of a globe valve include a movable disk or plug (referred to as the valve’s closure element), a stationary ring seat, a stem, and a handwheel or actuator. The stem is connected to the closure element and is responsible for raising and lowering it into or out of the flow path. When the valve is fully open, the closure element is positioned parallel to the flow, allowing for maximum flow. Conversely, when the valve is fully closed, the closure element is perpendicular to the flow, blocking it entirely.
Globe valves are known for their precise control of flow rates and are suitable for applications that require throttling or fine-tuned regulation. They are available in different designs, such as Tee Pattern (Z-body), Angle Pattern, and Wye Pattern (Y-body), each with its specific advantages and use cases. Globe valves are widely used in systems where pressure drop and flow control accuracy are critical considerations.
Arrotop’s globe valves offer reliable and precise flow control solutions tailored to meet the demands of various industrial applications. With a focus on quality and innovation, Arrotop delivers products that ensure superior performance and longevity.
There are three main body designs for Globe valves, namely the Tee Pattern or Z-body, Angle Pattern, and Wye Pattern or Y-body.
Types of Globe Valves
Product Data
Arrotop globe valves are designed to provide optimal flow control in various applications, offering high performance, reliability, and longevity. With multiple body material options and disc types, these valves are versatile and suitable for numerous industrial settings. The robust construction ensures durability, while the design allows for easy maintenance and operational efficiency.
A Globe valve is a type of linear motion valve specifically designed for the purposes of stopping, starting, and regulating flow. The valve’s disk has the capability to be entirely removed from the flowpath or can completely obstruct the flowpath when necessary.
Traditional Globe valves find application in both isolation and throttling services. While these valves may have slightly higher pressure drops compared to straight-through valves (such as gate, plug, or ball valves), they are suitable for situations where the pressure drop through the valve is not a critical factor.
The practical size limit for Globe valves is NPS 12 (DN 300) due to the fact that the entire system pressure acting on the disc is transmitted to the valve stem. Globe valves larger than NPS 12 (DN 300) are exceptional rather than common. The reason is that handling larger valves would necessitate exerting enormous forces on the stem to open or close the valve under pressure. Despite this, Globe valves in sizes up to NPS 48 (DN 1200) have been manufactured and employed.
Globe valves are widely utilized for flow control purposes. In the design of these valves, factors such as the range of flow control, pressure drop, and duty must be carefully considered to prevent premature failure and ensure satisfactory service. For valves exposed to high-differential pressure throttling service, specialized valve trim is necessary for optimal performance.
Features:
- Durability: High-quality construction ensures long-lasting performance in harsh environments.
- Precision: Designed for accurate flow control and regulation.
- Versatility: Suitable for a wide range of industrial applications.
- Ease of Maintenance: Accessible design for easy servicing and maintenance.
- Safety: Enhanced safety features to prevent leaks and ensure secure operations.
Design and Construction:
- Body Material Options: 316/L Stainless Steel, 304/L Stainless Steel, Carbon Steel, Alloy Steel, Other alloys available upon request
- Disc Options: Plug type, needle type, composition type
- Seals: PTFE, Graphite, and other high-performance sealing materials
- Bonnet Types: Bolted bonnet, welded bonnet, pressure seal bonnet
- End Connections: Flanged, butt-welded, socket-welded, threaded
- Sizes: 1/2″ to 24″ and larger sizes on request
Performance:
- Pressure Rating: ANSI Class 150 to Class 2500
- Temperature Rating: -20°F to 800°F (-29°C to 427°C)
- Flow Characteristics: Linear or equal percentage for precise control
- Standards Compliance: ASME B16.34, API 600, BS 1873, ISO 17292
Advantages
- High Performance: Designed for optimal flow control in various applications.
- Reliable Operation: Ensures consistent performance under demanding conditions.
- Longevity: Built to last with high-quality materials and construction.
- Ease of Installation: Multiple connection options for flexible installation.
- Customizable: Available in various sizes, materials, and configurations to meet specific requirements.
Model Numbers
| Model Number | Description | Connection Options | Disc Type | Available in All Grades |
|---|---|---|---|---|
| AGV-001 | Globe valve, ANSI Class 150 | Flanged, Butt-welded, Socket-welded, Threaded | Plug type | Yes |
| AGV-002 | Globe valve, ANSI Class 300 | Flanged, Butt-welded, Socket-welded, Threaded | Needle type | Yes |
| AGV-003 | Globe valve, ANSI Class 600 | Flanged, Butt-welded, Socket-welded, Threaded | Composition type | Yes |
| AGV-004 | Globe valve, ANSI Class 1500 | Flanged, Butt-welded, Socket-welded, Threaded | Plug type | Yes |
| AGV-005 | Globe valve, ANSI Class 2500 | Flanged, Butt-welded, Socket-welded, Threaded | Needle type | Yes |
Technical Information
| Parameter | Specification |
|---|---|
| Pressure Rating | ANSI Class 150 to Class 2500 |
| Temperature Rating | -20°F to 800°F (-29°C to 427°C) |
| Body Material | 316/L, 304/L, Carbon Steel, Alloy Steel, other alloys on request |
| Disc Options | Plug type, Needle type, Composition type |
| Seals | PTFE, Graphite |
| Connection Types | Flanged, Butt-welded, Socket-welded, Threaded |
| Sizes | 1/2″ to 24″ |
| Standards Compliance | ASME B16.34, API 600, BS 1873, ISO 17292 |
Size Chart
| Valve Size (inches) | Class 150 (mm) | Class 300 (mm) | Class 600 (mm) | Class 1500 (mm) | Class 2500 (mm) |
|---|---|---|---|---|---|
| 1/2″ | 140 mm | 152 mm | 165 mm | 216 mm | 292 mm |
| 3/4″ | 152 mm | 165 mm | 178 mm | 229 mm | 305 mm |
| 1″ | 178 mm | 191 mm | 216 mm | 254 mm | 368 mm |
| 1 1/2″ | 216 mm | 229 mm | 241 mm | 305 mm | 419 mm |
| 2″ | 267 mm | 292 mm | 292 mm | 368 mm | 470 mm |
| 2 1/2″ | 292 mm | 330 mm | 356 mm | 381 mm | 546 mm |
| 3″ | 356 mm | 356 mm | 381 mm | 419 mm | 635 mm |
| 4″ | 432 mm | 432 mm | 457 mm | 508 mm | 705 mm |
| 6″ | 559 mm | 559 mm | 610 mm | 610 mm | 838 mm |
| 8″ | 686 mm | 686 mm | 737 mm | 737 mm | 965 mm |
| 10″ | 787 mm | 787 mm | 838 mm | 838 mm | 1130 mm |
| 12″ | 838 mm | 838 mm | 889 mm | 889 mm | 1219 mm |
| 14″ | 864 mm | 864 mm | 991 mm | 991 mm | 1346 mm |
| 16″ | 889 mm | 889 mm | 1092 mm | 1092 mm | 1460 mm |
| 18″ | 991 mm | 991 mm | 1194 mm | 1194 mm | 1588 mm |
| 20″ | 1016 mm | 1016 mm | 1295 mm | 1295 mm | 1676 mm |
| 24″ | 1118 mm | 1118 mm | 1397 mm | 1397 mm | 1956 mm |
Applications of Globe Valves
- Throttling and Flow Control: Globe valves are widely used for throttling applications where precise control of flow rates is required. They are effective in regulating the amount of fluid passing through a pipeline.
- Boiler Feedwater Systems: Globe valves are commonly employed in boiler feedwater systems to control the flow of water into boilers. Their ability to provide accurate flow regulation is crucial for maintaining optimal water levels and pressure.
- Cooling Water Systems: Globe valves are used in cooling water systems, such as those in power plants and industrial facilities, to regulate the flow of cooling water through heat exchangers and other equipment.
- Process Industries: In various process industries, globe valves are utilized for controlling the flow of fluids in chemical, petrochemical, pharmaceutical, and food processing applications. Their precise control capabilities make them suitable for maintaining specific process conditions.
- Heating Systems: Globe valves are employed in heating systems to control the flow of hot water or steam, ensuring efficient heat distribution and temperature control.
- Fire Protection Systems: Globe valves are used in fire protection systems to control the flow of water or other fire-extinguishing agents. They play a crucial role in regulating water supply to fire hydrants and sprinkler systems.
- Shipbuilding and Marine Applications: Globe valves are commonly found in shipbuilding and marine systems, where they are used for controlling the flow of liquids in various components, including cooling systems and ballast tanks.
- Oil and Gas Industry: Globe valves are used in the oil and gas industry for applications such as controlling the flow of crude oil, natural gas, and other fluids in pipelines and processing facilities.
- Water Treatment Plants: Globe valves are employed in water treatment plants to regulate the flow of water and various chemicals in different stages of the treatment process.
- HVAC Systems: Globe valves play a role in heating, ventilation, and air conditioning (HVAC) systems, where they are used to control the flow of air, water, or refrigerant to maintain desired temperatures.
Advantages of Globe Valves
- Precise Flow Control: Globe valves are well-suited for applications requiring precise control of fluid flow. The design of the valve allows for accurate throttling, making them effective in regulating flow rates.
- Versatility: Globe valves can be used in a variety of applications, including both high and low-pressure systems. Their adaptability makes them suitable for diverse industries such as oil and gas, petrochemical, power generation, and water treatment.
- Good Shutoff Capability: Globe valves provide a reliable seal, making them effective for applications where a tight shutoff is essential. This characteristic is particularly important in processes where leakage cannot be tolerated.
- Wide Range of Sizes and Materials: Globe valves are available in a broad range of sizes, from small to large, and can be manufactured from various materials, including stainless steel, brass, and cast iron. This makes them versatile for different operating conditions.
- Durability: Globe valves are generally robust and durable, capable of withstanding challenging conditions and harsh environments. This durability contributes to their long service life.
- Ease of Maintenance: The design of globe valves often allows for easy access to internal components, simplifying maintenance and repairs. This ease of maintenance is advantageous for minimizing downtime in industrial processes.
- Suitability for Throttling Applications: Globe valves are particularly effective in throttling applications where the flow needs to be controlled or adjusted. The linear motion of the valve disc allows for gradual opening and closing, facilitating precise control.
- Various Body Designs: Globe valves come in different body designs such as Tee Pattern, Angle Pattern, and Wye Pattern, allowing users to choose the design that best suits their specific requirements.