Iso K Double Claw Kf 50 Nw40 Clamps
- Model:
- Brand:
- J&O
- Material:
- Stainless Steel/Aluminum
- Connection:
- Clamped
- Payment:
- T/T, L/C, Western Union
A kf clamp functions as an external mechanical retainer engineered to compress matching vacuum flanges over an elastomer seal and metallic centering ring assembly. Opposed forged aluminum claw jaws seat directly into machined perimeter grooves, translating center-bolt tension into perpendicular clamping forces across both flange faces simultaneously. This balanced axial retention sustains helium mass spectrometry leak rates below 1×10⁻⁹ mbar·L/s down to 10⁻⁸ Torr, eliminating flange face tilt without scratching protective surface coatings during vacuum system assembly.
Preventing Flange Lip Galling Through Hardness Harmonization
Fastening stainless steel claw components against soft aluminum chambers creates high contact stress that gouges metal grooves over repetitive maintenance cycles. Securing an engineered nw40 clamp fabricated from high-yield aluminum matches fastener hardness to the underlying vacuum port.
Identical thermal expansion coefficients between clamp claws and aluminum flange shoulders prevent localized thermal pinching up to 150°C. Controlled thread preload eliminates interfacial scuffing, preserving precision groove geometry across thousands of thermal cycles.
Vacuum Retaining Claw Material and Functional Attributes
| Fastener Alloy Base | Relative Magnetic Permeability | Contact Surface Gouge Risk | Thermal Expansion Harmony |
|---|---|---|---|
| Forged 6061-T6 Aluminum | Non-Magnetic (< 1.00002) | Extremely Low | Matched Expansion Rate |
| Passivated Austenitic Steel | Slight Residual Magnetism | High Groove Indentation | Dissimilar Metal Expansion |
| Plated Malleable Cast Iron | Strongly Ferromagnetic | Moderate Flange Spalling | Significant Stress Mismatch |
Neutralizing Bending Shear on Large Conductance Ports
Connecting process chambers to high-vacuum pumping groups exerts significant cantilever weight across horizontal ports. Applying a rigid iso k clamp layout establishes continuous perimeter balance across smooth grooved flange rims without requiring clearance through-holes.
Symmetrical claw toes grip recessed shoulders squarely, counteracting downward sagging moments that cause seal gapping. Perpendicular clamping vectors distribute seating stress evenly around the perimeter, preventing asymmetric compression across the inner fluorocarbon ring.
Stray Magnetic Field Isolation Along Foreline Manifolds
Electron microscopy chambers, ion beam paths, and semiconductor metrology tools require complete freedom from stray magnetic deflection. Fastening an aluminum kf 50 clamp ensures zero electromagnetic field distortion near sensitive particle trajectories.
The non-ferrous construction withstands deep cryogenic exposure without undergoing low-temperature embrittlement. Stable mechanical preload keeps exhaust couplings hermetically tight during continuous roughing pump pulsation.
