Kf40 Flange Double Claw Clamp
- Model:
- Brand:
- J&O
- Material:
- Aluminum
- Connection:
- Clamped
- Working Pressure:
- 0-2.5bar
- Payment:
- T/T, L/C, Western Union
A KF clamp joins two matching ISO-KF flanges by applying uniform mechanical force around the flange edges. When a centering ring positions the O-ring between the mating faces, the clamp creates the compression needed for a reliable vacuum seal. A double-pin aluminum design adds guided positioning while keeping the assembly compact for repeated service.
How the clamp forms the seal
The KF connection works as a mechanical sealing assembly rather than as a threaded joint. Two flanges are aligned with a centering ring and O-ring, then the clamp is tightened with its wing nut. Even clamping force keeps the flange faces seated and limits uneven O-ring compression. This arrangement supports quick installation and removal without relying on a large bolted flange.
Compared with double claw clamps used on larger ISO-K connections, a kf flange clamp is intended for the compact ISO-KF format. The double-pin structure keeps the clamp located on both sides of the flange, which is useful when alignment and repeated access matter.
Material and machining choices
The aluminum body reduces assembly weight while providing a practical balance of rigidity and serviceability for vacuum hardware. CNC machining supports controlled geometry, while the stated surface roughness of Ra≤0.8 μm provides a defined finish for the component. The product is specified for 1/2 to 2 in connections and a 0–2.5 bar working-pressure range.
Selection checks
| Selection factor | Practical check | Why it matters |
|---|---|---|
| Flange standard | Confirm matching ISO-KF size | Prevents fitment errors |
| Seal assembly | Verify O-ring and centering-ring compatibility | Controls sealing performance |
| Service conditions | Check pressure, temperature, and media | Avoids unsuitable material choices |
| Maintenance access | Consider clamp clearance | Supports faster removal and service |
Where KF40 fits
A kf40 clamp is commonly selected when the vacuum line uses the KF40 or NW40 size. The same selection logic applies across KF sizes: the clamp must match the flange geometry, centering ring, and seal arrangement rather than being chosen only by nominal tube size.
A kf clamp should therefore be evaluated as part of the complete vacuum joint. Correct flange alignment, clean sealing surfaces, suitable O-ring material, and even tightening are as important as the clamp body itself. For repeated maintenance, the double-pin configuration offers a practical combination of positioning control and quick access.
Product Description
| Product Name: | NF KF Double Pin Aluminum Vacuum Clamp with Sand Blast Polishing |
| Size: | 1/2"-2" |
| Material： | Aluminum |
| Machine： | CNC Lathe Machine |
| Connection: | Tri Clamp |
| SurfaceTreatment: | Ra≤0.8 |
| Gasket | Food Grade Silicone, Viton, PTFE |
| Type | Ferrule; elbow; tee; cross, hosebarb etc. |
| Optional | Customized tri clamp fitting available |
| Packing Details: | within carton box or plywood case |
| Applied Industries: | Chemical, gas, petrochemical, electric power, metallurgy, medical, food and pharmaceutical industry |
Product Parameter
