Spirax Sarco Valve Agent
Spirax Sarco BSA2T Bellows Shut-off Valve is a forced sealing valve, which means that pressure must be applied to the valve disc to ensure that the sealing surface does not leak when the valve is closed. When the medium enters the valve from below the valve disc, the operating force must overcome the friction force of the valve stem and packing, as well as the thrust generated by the medium's pressure. The force required to close the valve is greater than that to open it, so the diameter of the valve stem must be large; otherwise, the valve stem may bend. In recent years, with the introduction of self-sealing valves, the flow direction of the medium through the shut-off valve has been changed to enter the valve chamber from above the valve disc. Under the pressure of the medium, the force required to close the valve is reduced, while the force to open the valve is increased, allowing for a corresponding reduction in the diameter of the valve stem. Additionally, valves of this type are also more tightly sealed under the action of the medium. In China, the "Three Standards for Valves" has stipulated that the flow direction of shut-off valves should always be selected from top to bottom.
The Spirax Sarco BSA2T Bellows Shut-off Valve is a shut-off valve used in pipelines, where its opening and closing member is controlled by rotating the actuator to raise or lower the valve disc, thereby controlling the medium in the pipeline. The steam shut-off valve is mainly used to block, distribute, and change the flow direction of steam. It is used to block the medium in the pipeline or to adjust the flow rate of the medium and for throttling. The valve stem of the inlet shut-off valve has a relatively short opening or closing stroke and features very reliable blocking capabilities. Additionally, due to the proportional relationship between the valve seat opening and the valve disc stroke, it is very suitable for regulating steam flow. Spirax Sarco has various models of bellows shut-off valves including BSA1, BSA2, BSA3, BSA6T, BSA64T, A3S, HV3 shut-off valves, and DBB3 double flow double gate bellows sealed shut-off valves.
The Spirax Sarco BSA2T Bellows Shut-off Valve utilizes a unique bellows sealing design, completely eliminating the problem of valve stem packing leakage and meeting strict leakage level requirements. The zero leakage characteristic of the BSA type shut-off valve enhances equipment safety, saves a significant amount of energy, reduces maintenance costs, and provides a clean and safe working environment for industrial applications.
The BSA type shut-off valves range in size from DN15 to DN250 and are available in various materials, including cast iron (BSA1), ductile iron (BSA2), and cast steel (BSA3). Connection standards include flanged, threaded, and socket welding. Pressure ratings can reach PN40, ANSI 300, and CLASS 800. The maximum working temperature can reach 425°C, making it suitable for high-temperature systems, thereby meeting various industrial application requirements with one valve and ensuring long service life, maintenance-free operation, and robust construction.
Spirax Sarco BSA2T Shut-off Valve Application Fluids
1. Steam and condensate
2. Process fluids
3. Hot and cold water systems
4. Hot oil systems
5. Chemical fluids
6. Toxic fluids
7. Compressed air and other gases
8. Water/glycol and other industrial fluids
When placing an order, please fill out the "Specification Sheet" or specify the following:
1. If the model has not been selected before ordering, please provide the following parameters: 1. Nominal diameter, 2. Fluid properties (including nominal pressure, temperature, viscosity or acidity), 3. Valve body and core materials.
2. If the product model has already been selected by the design unit, please order directly from our business department according to the model;
3. If the application is very important or the pipeline is complex, please provide design drawings and detailed parameters for our experts to review and ensure compliance.
