
| No | Name | CS to ASTM | AS to ASTM | SS to ASTM | |
| A105 | F22 | F304 (L) | F316 (L) | ||
| 1 | Body | A105 | A182 F22 | A182 F304 (L) | A182 F316 (L) |
| 2 | Disc | A27 6420 | A276 304 | A276 304 (L) | A276 316 (L) |
| 3 | Stem | A182F6 | A182 F304 | A182 F304 (L) | A182 F316 (L) |
| 4 | gasket | 316+graphite | 316+PTFE | ||
| 5 | bonnet | A105 | A276 304 | A182 F304 (L) | A182 F316 (L) |
| 6 | Bolt | A19 3B7 | A193 B16 | A193 B8 | A193 B8M |
| 7 | Packing | Graphite | PTFE | ||
| 8 | sleeve | A276 410 | A182 F304(L) | A182 F316 (L) | |
| 9 | Gland | A216 WCB | A351 CF8 | ||
| 10 | Handwheel | A197 | |||
| 11 | Nameplate | SS | |||
| 12 | nut | A194 2H | A194 4 | A194 8 | A194 8M |
| 13 | Stem nut | A276 410 | |||
| 14 | Bolt | A194 2H | A194 4 | A194 8 | A194 8M |
| 15 | Eyebolt | A193 B7 | A193 B16 | A193 B8 | A193 B8M |
OS&Y stands for Outside Screw and Yoke. This design places the threaded stem outside the valve body, with the yoke supporting the stem. It allows users to visually verify whether the valve is open or closed by observing the stem’s position.
OS&Y gate valves are commonly used in fire protection systems, including sprinklers, hydrants, and standpipes, due to their reliability and clear open/close indication.
