Gray cast iron GG25 DIN bellows sealing globe valve wholesale factory

Gray cast iron GG25 DIN bellows sealing globe valve is a type of industrial globe valve, also called stop valve, commonly used for regulating flow in pipelines. It is made from gray cast iron material known as GG25, which is a specific grade of cast iron that offers good strength and corrosion resistance.

How GG25 gray cast iron DIN bellows globe valve looks like:

The bellows sealing feature of that GG25 cast iron DIN bellows sealing globe valve refers to the presence of a bellows or a flexible metal sleeve that surrounds the valve stem. The purpose of the bellows is to create a hermetic seal between the valve stem and the valve body, preventing any leakage of the fluid being controlled by the valve. This design is particularly useful when dealing with toxic or hazardous fluids that need to be contained within the pipeline.

The cast iron DIN bellows sealing globe valve design is characterized by a spherical-shaped valve body and a movable plug or disc mechanism that regulates the flow by either opening or closing the passageway through the valve. This type of valve provides precise control over the flow rate and has excellent shut-off capabilities.

The DIN (Deutsches Institut für Normung) standard is a set of technical specifications for industrial products in Germany and other European countries. The GG25 designation refers to the specific grade of gray cast iron material used in the valve.

How gray cast iron GG25 DIN bellows sealing globe valve realizes its sealing performance:

The gray cast iron GG25 DIN bellows sealing globe valve achieves its sealing performance through the implementation of a few key features:

1. Bellows: The gray cast iron GG25 DIN bellows sealing globe valve is equipped with a bellows, which is a flexible metal sleeve usually made of stainless steel. The bellows is welded or attached to the valve stem and helps to create a tight seal between the stem and the valve body. It is designed to accommodate the linear movement of the stem while maintaining impermeability to the fluid. The bellows effectively isolates the fluid from the external environment, preventing any leakage.
2. Stem Packing: In addition to the bellows, stem packing is used to further enhance the sealing performance. Stem packing is a system of packing rings or seals that surround the valve stem and prevent the fluid from escaping along the stem. It provides an additional layer of protection against leakage, ensuring a secure seal.
3. Valve Body Design: The globe valve design itself contributes to sealing performance. The valve body of the gray cast iron DIN bellows sealing globe valve is typically made with precise machining and close tolerances to ensure a tight fit between the valve seat and the plug or disc mechanism. When the valve is closed, the plug or disc is pressed against the seat, creating a tight seal that prevents any fluid from flowing through.
4. Backseat Design: Some globe valves are equipped with a backseat design, which enhances the sealing performance when the globe valve is fully closed. The backseat is a secondary seal located at the top of the valve stem. When the valve is fully opened, the backseat disengages. However, when the valve is closed, the backseat engages and creates an additional seal, providing extra assurance against leakage.

These features work together to ensure effective sealing performance in the gray cast iron GG25 DIN bellows sealing globe valve, minimizing the risk of fluid leakage and contributing to the overall reliability and safety of the valve in various applications.

Where those GG25 gray cast iron DIN bellows sealing globe valves are applied:

Gray cast iron GG25 DIN bellows sealing globe valves find application in various industries and are suitable for a range of fluid control and regulation scenarios. Some common applications include:

1. Gray cast iron GG25 DIN bellows sealing globe valves can be applied for Chemical Industry: These DIN bellows sealing globe valves are used in chemical processing plants to control the flow of corrosive fluids, hazardous chemicals, and aggressive media.
2. Gray cast iron GG25 DIN bellows sealing globe valves can be used in Petrochemical Industry: They are employed in petrochemical refineries for controlling the flow of petroleum products, gases, and other hydrocarbon-based fluids.
3. Gray cast iron GG25 DIN bellows sealing globe valves are used for Oil and Gas Industry: These gray cast iron DIN bellows globe valves are often used in oil and gas exploration, production, and transportation operations to regulate the flow of crude oil, natural gas, and other related fluids.
4. Gray cast iron GG25 DIN bellows sealing globe valves can be used for Power Generation: DIN bellows Globe valves with bellows seals are used in power plants for controlling and regulating steam flow, condensate, and other fluids in boiler systems, turbines, and other power generation equipment.
5. Gray cast iron GG25 DIN bellows sealing globe valves can be used for Water Treatment: They are applied in water treatment plants for managing the flow of water, chemicals, and wastewater in treatment processes, distribution networks, and pumping stations.
6. Gray cast iron GG25 DIN bellows sealing globe valves can be used in HVAC Systems: These valves find use in heating, ventilation, and air conditioning systems for controlling the flow of water, refrigerants, and other fluids to regulate temperature and maintain indoor comfort.
7. Gray cast iron GG25 DIN bellows sealing globe valves can be used in Pharmaceutical Industries: They are utilized in the pharmaceutical manufacturing process to control the flow of chemicals, solvents, and other fluids in various production stages.
8. Gray cast iron GG25 DIN bellows sealing globe valves can be used in food and Beverage Industry: These valves can be used in food processing plants to control the flow of liquid ingredients, CIP (cleaning-in-place) solutions, and other process fluids.

It’s important to consider the specific requirements of each application and select the appropriate valve materials, coatings, and sizing to ensure optimal performance and compatibility with the operating conditions.

Apart from gray cast iron GG25 DIN bellows sealing globe valve, Belo Valve can also supply ductile iron GGG40 DIN bellows sealing globe valves with diameter DN15-DN200, PN16, and also the gray cast iron GG25 DIN globe valves and ductile iron GGG40 DIN globe valves with DN15-200, PN16. for more details about those DIN globe valves and DIN bellows sealing globe valves, please contact us: