KF Chain Clamp

KF Chain Clamps provide a secure and convenient solution for fastening ISO-KF vacuum flange connections. Their flexible chain-style design allows the clamp to be positioned around the flange assembly and tightened to hold the two mating flanges securely together.

Unlike conventional rigid KF clamping rings, the chain clamp features multiple interconnected segments that wrap around the flange circumference. This design facilitates installation and removal, particularly in vacuum assemblies with restricted access or limited clearance.

Available in plastic (rated up to 60 °C) and aluminium versions, offering different options depending on the application and operating conditions.

Technical Specifications

Flange Sizes: DN16, DN25, DN40, DN50 KF

Material Options: Plastic (60 °C), Aluminium (Al)

Flange Connection: ISO-KF (QF / NW)

Configuration: Segmented chain-style vacuum flange clamp

Function: Mechanical fastening of ISO-KF flange connections

Sealing: Compatible KF centring ring with O-ring seal

Applications

Suitable for vacuum chambers, vacuum pumping systems, laboratory equipment, vacuum manifolds, and industrial vacuum installations requiring secure and convenient KF flange connections.

The segmented chain design is particularly useful for vacuum assemblies where space around the flange is limited or where connections must be assembled and disassembled regularly.

Installation and Compatibility

Compatible with standard ISO-KF flange connections of the corresponding nominal size. Position a suitable centring ring with an O-ring seal between the mating flanges, place the chain clamp around the flange assembly, and tighten it according to the manufacturer's instructions.

Compatible KF Centring Rings & Seals are available separately.

For conventional flange fastening, the KF Clamp is also available.

Temperature Limit: The plastic version is rated for temperatures up to 60 °C. The permissible operating temperature of the aluminium version depends on the manufacturer's specifications and the selected sealing components.

The achievable vacuum pressure and operating temperature depend on the complete flang