Three piece flange ball valve and gate valve belong to the same type of valve, with the difference being that their closing part is a sphere, which rotates around the centerline of the valve body to achieve opening and closing. Ball valves are mainly used in pipelines to cut off, distribute, and change the flow direction of the medium.
| Serial number | Part Name | Material | |
| - | - | Stainless steel | carbon steel |
| 1 | bolt | Stainless steel SS304 | carbon steel |
| 2 | spring washer | Stainless steel SS304 | Stainless steel SS304 |
| 3 | nut | Stainless steel SS304 | carbon steel |
| 4 | cap | Stainless steel CF8/CF8M | Carbon SteelWCB |
| 5 | valve body | Stainless steel CF8/CF8M | Carbon SteelWCB |
| 6 | sphere | Stainless steel CF8 | Stainless steel CF8 |
| 7 | sealing ring | Polytetrafluoroethylene/PTFE | PolytetrafluoroethylenePTFE |
| 8 | Stem | Stainless steel SS316 | Stainless steel SS304 |
| 9 | filler | PolytetrafluoroethylenePTFE | PolytetrafluoroethylenePTFE |
| 10 | Compression nut | Stainless steel SS304 | Stainless steel SS304 |
| 11 | spring washer | Stainless steel SS304 | Stainless steel SS304 |
| 12 | nut | Stainless steel SS304 | Stainless steel SS304 |
| 13 | handle | Stainless steel SS304 | Stainless steel SS304 |
| SIZE | 1/2″ | 3/4″ | 1" | 1 1/4″ | 1 1/2″ | 2" | 2 1/2″ | 3″ | 4″ |
| d | 15 | 20 | 25 | 32 | 38 | 50 | 65 | 76 | 100 |
| L | 130 | 150 | 160 | 180 | 200 | 230 | 290 | 310 | 350 |
| D | 95 | 105 | 115 | 135 | 145 | 160 | 180 | 195 | 230 |
| D1 | 65 | 75 | 85 | 100 | 110 | 125 | 145 | 160 | 190 |
| D2 | 45 | 55 | 65 | 78 | 85 | 100 | 120 | 135 | 160 |
| b | 14 | 16 | 16 | 18 | 18 | 20 | 22 | 24 | 24 |
| f | 2 | 2 | 2 | 3 | 3 | 3 | 3 | 3 | 3 |
| H | 75 | 95 | 90 | 110 | 130 | 140 | 140 | 180 | 250 |
| W | 130 | 140 | 140 | 170 | 200 | 220 | 220 | 350 | 550 |
| n-do | 4-14 | 4-14 | 4-14 | 4-18 | 4-18 | 8-18 | 8-18 | 8-18 | 8-22 |
| Nominal Size | 1/2"-4" |
| Nominal pressure | 1.6Mpa-25Mpa |
| Temperature | -20ºC~220ºC |
| Medium | water, oil, gas and some corrosive mediun |
| Connection type | Flange, butt welded, threaded |
| Operation | manual, electric, pneumatic |
