Details
A cast steel globe valve is a type of industrial valve used to regulate and control the flow of fluids such as water, steam, oil, and gas in pipelines. It belongs to the family of linear motion valves and is widely employed in various industries including petrochemical, oil and gas, power generation, water treatment, and more.
Here's an overview of the key features and characteristics of cast steel globe valves:
Construction: As the name suggests, cast steel globe valves are typically constructed using cast steel materials. This construction offers durability, strength, and resistance to corrosion, making them suitable for a wide range of applications, including high-pressure and high-temperature environments.
Design: Globe valves have a spherical body with an internal baffle, known as a disc or plug, which can be raised or lowered to control the flow of fluid through the valve. The flow direction is changed by the upward or downward movement of the disc perpendicular to the direction of flow, hence the name "globe" valve.
Bonnet Design: The bonnet of a cast steel globe valve houses the stem and provides a seal to prevent leakage. Depending on the design and application requirements, globe valves can have different types of bonnets such as bolted bonnet, pressure seal bonnet, or welded bonnet.
Actuation: Cast steel globe valves can be operated manually using a handwheel or automatically with the help of actuators such as electric, pneumatic, or hydraulic actuators. Actuators provide remote control and automation capabilities, allowing for precise modulation of flow as per process requirements.
Pressure and Temperature Ratings: Cast steel globe valves are designed to withstand high-pressure and high-temperature conditions. They are available in various pressure classes ranging from ANSI 150 to ANSI 2500 and temperature ratings suitable for a wide range of industrial applications.
End Connections: These valves come with a variety of end connection options including flanged, threaded, or welded ends, facilitating easy installation and integration into existing piping systems.
Applications: Cast steel globe valves find application in numerous industries and processes where flow control, isolation, and throttling are required. They are commonly used in power plants, refineries, chemical processing plants, water treatment facilities, HVAC systems, and more.
Advantages: Some advantages of cast steel globe valves include excellent throttling capability, good sealing performance, robust construction for long service life, and suitability for high-pressure and high-temperature applications.
Disadvantages: On the flip side, globe valves may have relatively higher pressure drops compared to other types of valves like gate valves. They also require more maintenance due to the complexity of their design.
In conclusion, cast steel globe valves play a crucial role in fluid control systems across various industries. Their robust construction, reliable performance, and versatility make them indispensable components in ensuring the safe and efficient operation of industrial processes.
Body/bonnet: ASTM A216 WCB
Disc: ASTM A105+STL
Seat: INTEGRAL+STL
Stem: ASTM A182 F6A
Valve Design: BS 1873
Flange: ASME B16.5
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