Caliber valves provides a wide range of non-return valves. These non-return valves are very much practically applicable to all process fluids. These valves are of lift check type with bolted bonnet construction. They have flanged end connection for easy fitment and maintenance. The non-return valves are designed as per bsi: 1868 for a rating of nd 40 and tested as per bs: 5160/api: 598. Flange drilling can be as per nd: 40/ansi b16.5 class 150 as the case may be. The valves are available from 15 mm to 200 mm sizes and can also be offered with ibr certificate in form iii. The body and cover plate are astm a 216 gr wcb and the seat and disc are cs hard faced with 13 per cent chrome steel; spiral wound gaskets are provided for positive sealing of the body cover plate joint. These non-return valves find its application with safety of the equipment and the people handling them particularly in parallel operations. The valves make sure that there is no unintentional bypassing of the process media through the equipment and pipelines when not required.
