ITT Engineered Valves
Cam-Tite Bellows Stem Seal
The Cam-Tite bellows stem seal provides a hermetic stem seal through a unique quarter-turn bellows in which the bellows assembly becomes integral to the valve bonnet, allowing disassembly for replacement of internal components. It is available in ANSI Class 150 and 300 in a variety of body, ball and stem materials and can be readily actuated. The underlying beveled-ball Cam-Tite design mechanically energizes both seats for a tight seal independent of line pressure.
Bellows Stem Seal
| Seal type | Hermetic quarter-turn bellows stem seal |
|---|---|
| Bonnet interface | Bellows assembly integral to bonnet; removable for internal component replacement |
| Pressure classes | ANSI Class 150 and 300 |
| Actuation | Can be readily actuated |
| Development | Joint design by Engineered Valves and Kerotest |
Materials of Construction (Base Valve)
| Body (Carbon Steel) | CS ASTM A216 Gr WCB |
|---|---|
| Body (Stainless Steel) | SS ASTM A351 Gr CF8M |
| Body (Alloy 20) | SS ASTM A351 Gr CN7M |
| Body (Hastelloy) | HAST ASTM A494 CW6M |
| Ball / Stem | SS ASTM A276 Type 316 (ceramic ball optional) |
| Seats / Seals | PTFE, Reinforced PTFE, UHMW polyethylene, G2000/G3000 PEEK, or Firesafe |
Cold Working Pressure - Class 150 (PSIG)
| Carbon Steel - WCB | 285 |
|---|---|
| Stainless Steel - CF8M, CF3M | 275 |
| Alloy 20 - CN7M | 230 |
| Monel M-35-1 | 230 |
| Hastelloy CW-6M | 290 |
| Titanium - B367 Gr C3 | 265 |
Cold Working Pressure - Class 300 (PSIG)
| Carbon Steel - WCB | 740 |
|---|---|
| Stainless Steel - CF8M, CF3M | 720 |
| Alloy 20 - CN7M | 600 |
| Monel M-35-1 | 600 |
| Hastelloy CW-6M | 750 |
| Titanium - B367 Gr C3 | 695 |
Seat & Seal Temperature Ranges
| Virgin PTFE | -50 F to 450 F (-45 C to 232 C) |
|---|---|
| Reinforced PTFE (RTFE) | -60 F to 520 F (-51 C to 271 C) |
| UHMW Polyethylene | up to 200 F (93 C) |
| G3000 PEEK | up to 550 F (288 C) |
Sizes & Standards
| Valve sizes | 1/2" through 6" |
|---|---|
| Design / test | ASME B16.34, MSS-SP-72, ASME B16.10 |
| Flanged ends | ASME B16.5 |
| Firesafe qualification | API 607 |
