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Ball valves are widely used for on/off flow control in various applications due to their simple design, reliable operation, and low maintenance needs. There are two main types, single-piece, and two-piece, each with distinct characteristics and suitable uses:
The solid, cast body ensures high pressure and temperature resistance.
Compact and lightweight design.
More affordable than two-piece valves.
Not repairable or rebuildable (disposable).
Limited size range (typically smaller diameters).
The body consists of two parts connected by bolts or flanges.
Offers easier access to internal components for maintenance and repair.
A wider size range and higher pressure ratings are available.
More expensive than single-piece valves.
Higher potential for leakage at the body joint.
| Valve Size | A | B | C | D | E | H | Approx. Weight (kg) |
|---|---|---|---|---|---|---|---|
| 15 | 108 | 46 | 163 | 12.7 | 97 | - | 1.8 |
| 20 | 117 | 50 | 168 | 19.1 | 118 | - | 2.5 |
| 25 | 127 | 56 | 168 | 25.4 | 123 | - | 3.4 |
| 40 | 165 | 75 | 193 | 38.1 | 139 | - | 8.5 |
| 50 | 178 | 84 | 193 | 50.8 | 150 | - | 12.2 |
| 65 | 191 | 77 | 402 | 64.1 | 190 | - | 18.5 |
| 80 | 203 | 99 | 256 | 76.2 | 155 | - | 23.0 |
| 100 | 229 | 108 | 402 | 101.6 | 196 | - | 42.6 |
| 150 | 394 | 179 | 1004 | 150.8 | 315 | - | 90.0 |
| 200 | 457 | 206 | - | 203.0 | 690 | 578 | 170.0 |
| Sl. No. | Part | Carbon Steel | Stainless Steel |
|---|---|---|---|
| 1 | Body | ASTM A216 Gr. WCB | ASTM A351 Gr. CF8M |
| 2 | Body Connector | ASTM A216 Gr. WCB | ASTM A351 Gr. CF8M |
| 3 | Ball | ASTM A351 Gr. CF8M | ASTM A351 Gr. CF8M |
| 4 | Seat | PTFE | PTFE |
| 5 | Stem | AISI 316 | AISI 316 |
| 6 | Body Seal | Graphite | Graphite |
| 7 | Gland Packing | Graphite | Graphite |
| 8 | Stem Seal | 25% Glass-filled PTFE | 25% Glass-filled PTFE |
| 9 | Insert | ASTM A105 / ASTM A216Gr. WCB / IS1875 Cl2 | AISI 316 or ASTM A351Gr. CF8M |
| 10 | Insert Gasket | Graphite | Graphite |
