Views: 0 Author: J-VALVES Publish Time: 2025-03-21 Origin: Site
Understanding JIS B2071 Standard
JIS B2071 is a Japanese Industrial Standard that specifies the requirements for globe valves, including angle globe valves. This standard covers the design, construction, testing, and marking of valves, ensuring they meet high-quality and safety standards. Compliance with JIS B2071 ensures that the valves are suitable for a wide range of industrial applications and are compatible with other components in the system.
• Design and Construction: The standard outlines the materials, dimensions, and construction methods to ensure valves can withstand specified pressures and temperatures.
• Pressure and Temperature Ratings: Valves must meet specified pressure and temperature ratings to ensure safe operation under different conditions.
• Testing and Inspection: Rigorous testing procedures, including hydrostatic and pneumatic tests, are required to verify the valve's integrity and performance.
• Marking and Documentation: Valves must be clearly marked with essential information, such as size, pressure rating, and material, and must be accompanied by detailed documentation.
Selection Tips for Angle Globe Valves
1. Determine the Operating Conditions
• Fluid Type: Identify the type of fluid being handled, including its corrosiveness, viscosity, and specific gravity.
• Temperature and Pressure: Determine the maximum operating temperature and pressure. Ensure the valve material and design can withstand these conditions.
• Flow Characteristics: Consider the velocity and turbulence of the fluid flow. Angle globe valves are designed to minimize pressure drop compared to other types of globe valves.
2. Choose the Appropriate Material
• Stainless Steel: Suitable for applications involving corrosive fluids. Common materials include SCS13 (304) and SCS14 (316).
• Carbon Steel: Ideal for applications involving non-corrosive fluids and higher pressures.
• Other Alloys: For specialized applications, consider materials like Hastelloy or Inconel, which offer superior corrosion resistance and high-temperature performance.
3. Select the Right Valve Size and Pressure Rating
• Size Range: Ensure the valve size (DN50-DN200) matches the pipeline diameter. Larger sizes may require additional support or actuation mechanisms.
• Pressure Rating: Choose a valve with a pressure rating that exceeds the maximum operating pressure. Common ratings include 10K, 20K, and 40K.
• Bidirectional Sealing: Some angle globe valves offer bidirectional sealing, which is useful in applications where fluid flow can reverse.
• Soft vs. Hard Sealing: Soft seals (e.g., PTFE) provide excellent sealing performance but may have temperature limitations. Hard seals (e.g., metal seats) offer higher temperature and pressure resistance but may require more maintenance.
5. Evaluate the Actuation Method
• Manual Operation: Suitable for applications where frequent operation is not required.
• Electric or Pneumatic Actuation: Provides precise control and automation, suitable for remote or automated systems.
6. Ensure Compatibility with JIS B2071
• Structural Length: Ensure the valve's structural length complies with JIS B2002.
• Flange Dimensions: Verify that the flange dimensions and bolt patterns comply with JIS B2212 and JIS B2214.
• Testing and Certification: Ensure the valve has been tested and certified according to JIS B2003.
