Stainless Steel Vacuum Kf Iso Chain Clip Design Features And Applications

A stainless steel KF ISO chain clamp in SS304 with a clamp connection, ISO standard, and 0-5 bar range seals vacuum lines through even chain compression. Lock it by aligning flanges, seating the O-ring, fitting the chain, and turning the knob to first resistance. This lowers leak rate in semiconductor and electronics manufacturing.

How the Chain Design Reaches Low Leak Rates

A two-piece clamp concentrates force at one or two points. The flange sees uneven compression. The O-ring seals well in some spots and poorly in others.

A chain clamp uses linked segments. Tightening pulls every segment against the flange rim. Force spreads around the full circumference.

Even Compression Lowers Helium Leak Rate

• ⚙️ Even compression lowers helium leak rate.

• 🔬 ISO-KF joints with metal seals reach 10⁻⁹ mbar range.

• 📉 Tested assemblies hold below 1×10⁻¹¹ Pa·m³/s.

• ✅ Even compression extends O-ring life.

Sizing the Clamp to the Flange

Chain clamps cover DN 10 to DN 50. Match the clamp to the flange outside diameter. For kf 16 clamp sizes, three segments are typical. The table lists chain segment counts and torque values.

Torque and Temperature Limits

• Torque values are reference figures.

• Tighten until resistance rises, then stop.

• Extra force damages the seal.

• The SS304 body works from -196°C to 300°C.

• That range covers bake-out cycles in process chambers.

Where Chain Clamps Fit in Semiconductor Production

Semiconductor tools demand low leak rate and stable sealing over long runs. The kf clamp handles the second demand through vibration resistance. Multiple segments hold the flange at initial compression when pumps and robots shake the frame.

At chamber-to-chamber and transfer-to-process connections, metal seals with chain clamps keep leak rate below 3×10⁻⁶ Pa·m³/s. For water vapor and process gas partial pressure control, the figure tightens further.

• One hand locks or releases it.

• For kf40 clamp sizes, four segments are common.

• Leak rate stays below 3×10⁻⁶ Pa·m³/s.

Matching KF Sizes

Use a kf25 clamp with four chain segments for DN 25 flanges. Confirm the chain segment count matches the flange diameter. A mismatched clamp leaves gaps at the rim. Check the pressure rating at each size.

• kf25 clamp with four segments for DN 25.

• Mismatched clamp leaves gaps.

• Check pressure rating.

Installation and Maintenance Steps

Correct installation decides seal quality. Check the flange face for scratches and center the O-ring before locking.

1. Align both flanges and seat the centering ring with O-ring.

2. Fit the chain clamp so every segment contacts the flange rim.

3. Turn the locking knob until resistance rises, then stop.

4. Inspect the O-ring for flattening or cracks at each service interval.

Over-tightening crushes the O-ring and creates a leak path. A half turn past first resistance is enough.

Frequently Asked Questions

How does a chain clamp differ from a spring clamp?
The chain spreads force through several segments. A spring clamp relies on single-point tension. The chain holds better under vibration.

Which clamp fits a DN 25 flange?
Use a kf25 clamp with four chain segments, built to ISO-KF dimensions.

Can the clamp work with metal seals?
Yes. Metal seals need higher, even force. The chain design delivers that better than a plain clamp.

Does the O-ring need replacing every time?
No. Reuse it if no flattening or cuts appear. Replace it when compression set shows.

What pressure range does the clamp handle?
The SS304 chain clamp works from 0 to 5 bar with a clamp connection and ISO flange.

Stainless Steel SS304 Vacuum KF ISO Chain Clamp

Suitable for use with elastomer and metallic seals.

Product Description