COMMON VALVE ABBREVIATIONS
| Organisations/Societies | |||
| ANSI | American National Standards Institute | API | American Petroleum Institute |
| ASME | American Society of Mechanical Engineers | ASTM | American Society for Testing Materials |
| BS | British Standards | DIN | Deutsche Industrie - Normen |
| BVQI | Bureau Veritas Quality International | ISO | International Standards Organisation |
| Valve Materials | |||
| Br | Bronze | A.I. | All Iron |
| C.I. | Cast Iron | M.I. | Malleable Iron |
| N.I. | Nickel Iron | D.I. | Ductile Iron |
| C.S. | Cast Steel/Carbon Steel | F.S. | Forged Steel |
| S.S. | Stainless Steel | PVC | Polyvinyl Chloride |
| N | Nickel | M | Monel |
| Mo | Molybdenum | Al | Aluminium |
| Cr | Chromium | Tef | Teflon |
| 13% Cr | Type 410 Stainless Steel | HF | Hard Face (Stellite Face) |
| Operating Mechanisms | |||
| O.S. & Y | Outside Screw & Yoke | N.R.S. | Non Rising Stem |
| R.S. | Rising Stem | ||
| End Connections | |||
| F.E. | Flanged Ends | S.E. | Screwed Ends |
| F.F.D. | Flanged, Faced & Drilled | B.W. | Butt Welding Ends |
| S.W. | Socket Welding Ends | Scr. | Screwed Ends |
| Flg. | Flanged Ends | S.J. | Solder Ends |
