High Vacuum Clamp Fittings – KF, ISO-K
High Vacuum – KF / ISO-K Clamp
The KF (Klein Flansch – small flange) and ISO-K (derived from KF) clamp system is a widely used method for creating vacuum connections in high vacuum applications, typically reaching pressures in the 10^-7 to 10^-8 Torr range.
Advantages of KF/ISO-K for High Vacuum:
- Ease of Use: The KF/ISO-K system is known for its quick assembly and disassembly without requiring complex tools, making it ideal for frequent connections and disconnections.
- Cost-Effective: With their simpler design, KF/ISO-K components are generally less expensive.
- Relatively Leak-Tight: With proper assembly and good quality O-rings, the KF/ISO-K system can achieve the high vacuum levels needed for many applications.
| pRODUCTS | vARIATIONS |
|---|---|
| Sizes (Tubes Diameter) | KF 25 (1″), KF 40 (1-1/2″), KF 50 (2″) |
| Bored flange, Blind flange | SS304 / SS316 |
| Centering Ring with O-ring | SS304 / SS316, outer ring (positive pressure) |
| Wingnut Clamp | Aluminum / SS304 |
| Viton O-ring | -20 – 200°C Operating Temperature |
| Fittings – Elbow, Tee, Reducer, Pipe, Bellow | Buttweld to Flange, c/w Flange |



| Items | Variations |
|---|---|
| Sizes (Tube Diameter) | ISO 63 (2-1/2″), ISO 80 (3″), ISO 100 (4″) , ISO 160, 200 |
| Bored flange, Blind flange | SS304 / SS316 |
| Centering Ring with O-ring and Outer ring | SS304 / SS316, outer ring (Aluminum) |
| Double Claw Clamp | Aluminum body, M8 SS304 screw |
| Viton O-ring | -20 – 200°C Operating Temperature |
| Fittings – Elbow, Tee, Reducer, Tube, Bellow | Buttweld to Flange, c/w Flange |
