ICS 23.060.01                         MED 17

Revised Standard from Last Update.

1 SCOPE

1.1 This standard covers double flanged and wafer type of metal seated, resilient seated cast iron, ductile iron and carbon steel, stainless steel and lined butterfly valves, for general purposes. Valves covered under this standard are manually, pneumatically, hydraulically or electrically operated. This standard establishes minimum requirements for butterfly valves to be used in municipal utility distribution, irrigation, agriculture, industrial air conditioning, sewage treatment, solar photovoltaic power generation and allied purposes however, butterfly valves to be used in industrial plants, like oil and gas, power generation, chemical plants, food and beverage, pharmaceuticals, marine and defense, fire service and allied purposes are excluded from the scope of this standard.

1.2 It covers valves of nominal pressure designations up to and including 4 MPa and Class 300 with ends flanged or wafer type valves with bodies designed to be accommodated between pipe work flanges in accordance with appropriate tables of IS 6418 ‘Cast iron and malleable cast iron flanges for general engineering purposes’, IS 9523 ‘Ductile iron fittings for pressure pipes for water, gas and sewage - Specification’ or IS 6392 ‘Steel pipe flanges’ in nominal sizes DN 40 to DN 2000. It also covers valves up to class 300 and flanges as per the pressure/temperature ratings given in IS 13159 (Part 1) ‘Pipe flanges and flanged fittings - Specification: Part 1 Dimensions’.

2 REFERENCES

The Indian Standards listed in Annex A contain provisions which through reference in the text, constitute provision of this standard. At the time of publication, the editions indicated were valid. All standards are subject to revision, and parties to agreements based on this standard are encouraged to investigate the possibility of applying the most recent editions of the standards.