This standard specifies the requirements for flanged cast iron gate, globe, and check valves used for industrial and general-purpose pipelines. It covers material specifications, pressure-temperature ratings (PN 1.0 & PN 1.6), dimensions, design, testing, and marking for valves from DN 40 to DN 1000. The standard ensures performance and interchangeability for valves in water, steam, oil, and other fluid applications.
Covers requirements for cast iron gate, globe, and check valves for industrial applications up to PN 16.
Quick Reference Values
Minimum body material gradeGrey Cast Iron Grade FG 200 as per IS 210
Nominal pressure ratings coveredPN 1.0 (10 bar) and PN 1.6 (16 bar)
Nominal size (DN) range40 to 1000
Hydrostatic shell test pressure1.5 x maximum permissible working pressure (cold)
Hydrostatic seat test pressure1.1 x maximum permissible working pressure (cold)
Maximum permissible temperature220°C (with restrictions)
Practical Notes
Always verify the pressure (PN) rating and temperature suitability for the intended service; mismatches are a common cause of failure.
Ensure correct gasket selection and bolt torqueing during installation to prevent flange leakage, a frequent issue on-site.
For steam service, confirm the valve's pressure rating at the operating temperature using Table 2, as the permissible pressure decreases significantly at higher temperatures.