Standards & Features Design & Manufacture: BS5163, DIN3352 Face to Face Dimension: BS2080, DIN3202, JIS B2002, GB/T12221 Flanged Dimension: GB4216, ISO7005, DIN2501 Inspect & Test: GB/T13927 Non-rising Stem Resilient OS & Y Resilient Hydraulic Actuated Resilient Shroud Indicated Resilient Electric Actuated Resilient