BSI 20/30384581 DC:2020 Edition

This document specifies requirements and acceptance criteria for type testing of metallic butterfly and ball valves used for isolating services for all industrial applications, and serves to validate the product design for 205 cycles.

This document excludes testing for safety devices, control valves and thermoplastics valves.

This document defines the procedure for extending the qualification of the tested valve to untested sizes and pressure designations of the same product range.

The purpose of this type test is to validate the seat performance within manufacturer given pressure/temperature rating, provided by the manufacturer’s technical documentation of the product. This type test verifies torque requirements and MAST, as given in the manufacturer technical documentation. This type test validates the durability of seat performance and operating torque through mechanical and thermal cycles.