Views: 0 Author: J-VALVES Publish Time: 2025-02-26 Origin: Site
BS 5153 is a British Standard that specifies the requirements for cast iron check valves suitable for general purposes. The standard covers a range of nominal diameters (DN 10 to 1000) and nominal sizes (1⁄2 to 6) with nominal pressure ratings (PN 6, 10, 16, and 25). These valves are designed for use in water, oil, and steam systems, ensuring reliable performance and safety.
1. Scope: Defines the range of valve sizes and pressure ratings covered by the standard.
2. Design and Manufacture: Specifies detailed requirements for the design and manufacturing of the valves, including body ends, body tappings, and connections.
3. Materials: Outlines the choice of materials for different components of the valve.
4. Testing and Inspection: Provides protocols for testing and inspection to ensure the valves meet the required performance standards.
5. Marking: Specifies the marking requirements for the valves, including general markings, body markings, and identification plate markings.
6. Valves for ANSI Flanged Piping Systems: Additional requirements for valves intended for use in ANSI flanged piping systems.
Technical Requirements for Cast Iron Ball Valves
• Body and Bonnet: Cast iron or ductile iron.
• Disc: Cast iron or ductile iron.
• Seat Ring: Bronze or stainless steel.
• Hinge Pin: Stainless steel.
• Face-to-Face Dimensions: Comply with BS 5153 and EN 558-1 standards.
• Flange Ends: Designed to meet BS 4504 or EN 1092-2 standards.
• Working Pressure: PN 10 and PN 16 ratings.
• Testing Pressures: Shell test at 1.5 times the working pressure, seat test at 1.1 times the working pressure.
Technical Requirements for Cast Iron Gate Valves
• Body and Bonnet: Cast iron.
• Gate: Cast iron or ductile iron.
• Seat Ring: Bronze or stainless steel.
• Stem: Brass or stainless steel
• Parallel Slide Design: Ensures smooth operation and reliable shutoff.
• Face-to-Face Dimensions: Comply with BS 5153 and EN 558-1 standards.
• Flange Ends: Designed to meet BS 4504 or EN 1092-2 standards.• Working Pressure: PN 10 and PN 16 ratings.
• Testing Pressures: Shell test at 1.5 times the working pressure, seat test at 1.1 times the working pressure.
Comparative Analysis
Key Differences
| Feature | Cast Iron Ball Valves | Cast Iron Gate Valves |
| Valve Type | Ball Valve | Gate Valve |
| Design | Floating ball design, bidirectional sealing | Parallel slide design, unidirectional sealing |
| Material | Cast iron or ductile iron | Cast iron or ductile iron |
| Sealing Performance | Excellent bidirectional sealing | Excellent tight shutoff in one direction |
| Applications | Water, oil, steam systems | Water, oil, steam systems |
| Testing Protocols | Hydrostatic and pneumatic tests | Hydrostatic and pneumatic tests |
