Carbon steel globe valves

Globe Valves: Precision Control for Industrial Applications

Globe valves are an essential component in the realm of industrial flow control, offering a reliable and effective means of regulating the flow of fluids through pipelines. These valves are distinguished by their unique design, which includes a movable disk-type element and a stationary ring seat within a generally spherical body. Unlike ball valves, globe valves provide a more precise and controlled flow regulation, making them the preferred choice in numerous industries, including refineries, hydrocarbon processing, energy production, and power generation.

Globe Valves - The Choice for Precise Flow Regulation in Industrial Processes

The globe valve's design is not only functional but also versatile, allowing it to be used in a wide range of applications and conditions. From handling high-pressure streams to regulating flow in low-temperature environments, globe valves are engineered to meet the diverse demands of the industry.

Size and Pressure Ratings

Globe valves are available in a variety of sizes, starting from DN 15 up to DN 600, ensuring compatibility with different pipeline systems and flow requirements. The pressure ratings of these valves are equally impressive, ranging from ASME 150# to 2500#, or equivalently, 150Lbs to 2500Lbs and Class 150 to Class 2500. This wide range of sizes and pressure ratings makes globe valves suitable for a multitude of industrial processes, providing a reliable solution for flow control in various scenarios.

Materials

The material selection for globe valves is crucial to their performance and durability. They are manufactured using a range of materials, including carbon steels, low-temperature carbon steel, martensitic steels, austenitic stainless steel, duplex stainless steels, super duplex stainless steels, and more. The material codes such as A216 WCB, A352 LCB, A217 WC1, A217 WC6, A217 WC9, A217 C5, A217 C12, A351 CF8, A351 CF8M, A351 CF3, and A351 CF3M ensure that the valves can withstand the corrosive and high-temperature conditions often encountered in industrial settings.

Design and Test Standards

Globe valves are designed following strict standards to ensure their reliability and performance. The BS 1873 and API 623 standards guide the design and pressure/temperature ratings of these valves, while the ASME B 16.34 standard covers their size and face-to-face dimensions. The inspection and testing of globe valves are conducted in accordance with API 598, ISO 5208, and BS 6364, ensuring that each valve meets the highest quality and safety standards.

Construction Details

Globe valves come in several construction variations to cater to specific application needs:

1. Bolted Bonnet Globe Valves: These valves feature a bolted bonnet design that allows for easy disassembly and maintenance of the valve internals.

2. Pressure Seal Bonnet Globe Valves: Designed with a pressure seal bonnet, these valves provide enhanced sealing capabilities, ensuring a leak-free operation.

3. Customized Globe Valves/Modified Globe Valves: Available to meet unique customer requirements, these valves can be tailored to specific application demands.

4. OS & Y Type Rising Stem Globe Valve: These valves offer a clear indication of the valve position and are      available with end connections such as flange type, socket weld, and butt-weld.

Operators and Actuators

Globe valves can be operated manually or through various actuators, depending on the application's needs. The options include handwheel-operated, gear-operated, and actuator-operated (manual, pneumatic, hydraulic, and electric motorized), ensuring precise control and ease of operation.

Cryogenic Service Design

For applications requiring operation at extremely low temperatures, globe valves can be specially designed for cryogenic service. These valves are constructed using materials and technical features that can withstand the minimum design temperature specified by the customer, down to -196°C. To verify the performance of these valves in cryogenic conditions, specific cryogenic tests can be conducted to evaluate valve torque, sealing capability, and emissions relative to the ambient temperature.

In conclusion, globe valves are a versatile and reliable solution for precise flow control in a variety of industrial applications. Their robust design, wide range of materials, and adherence to stringent standards make them an ideal choice for industries seeking dependable and efficient flow regulation. Whether it's for high-pressure processes, corrosive environments, or cryogenic temperatures, globe valves are engineered to perform and exceed expectations.