Short KFF vacuum bellows

Short KFF vacuum bellows are compact, flexible connectors designed for high and ultra-high vacuum systems. They utilize the KF (Klein Flange) or QF (Quick Flange) clamping system, known for its fast, flangeless, and reliable sealing using a center ring and clamp. Their “short” profile makes them ideal for applications with strict space constraints.

Description

Short KFF vacuum bellows

Short KFF Vacuum Bellows

Key Applications

Precision Alignment & Misalignment Compensation: Primarily used to absorb minor axial, lateral, and angular misalignments between connected components (like valves, gauges, or chambers) that are difficult to align perfectly. This prevents stress on flanges and seals.
Vibration Isolation: Acts as a dampener to isolate sensitive equipment (e.g., analytical instruments, microscopes) from vibrations transmitted through the vacuum stand or pumping system.
Thermal Expansion Compensation: Accommodates dimensional changes in piping systems caused by thermal cycling (heating or cooling during bake-out or process cycles), preventing leaks or damage due to stress.
Compact System Design: Essential for creating flexible connections in densely packed experimental setups, semiconductor tool modules, and portable vacuum systems where space is at a premium.
Module Connection/Disconnection: Facilitates the frequent connection and disconnection of system modules for maintenance or reconfiguration, with the flexibility to bridge small gaps effortlessly.

Common Use Cases: Analytical instrument inlets, beamlines, sample introduction systems, between vacuum pumps and chambers, and in R&D vacuum setups where flexibility is required.

KFF vacuum bellows Features

Compact & Space-Saving: Minimal installed length maximizes flexibility in tight spaces where standard bellows cannot fit.
KF (Quick Flange) Compatibility: Features standardized KF flanges (e.g., KF-25, KF-40) for rapid, tool-free assembly and disconnection using a single clamp.
High Flexibility: Despite short length, provides excellent multi-axis flexibility to accommodate movement.
High Vacuum Integrity: Constructed from stainless steel (typically 304 or 316L) and designed for leak-tight performance from atmospheric pressure to high vacuum (often down to 10<sup>-8</sup> mbar or lower).
Bakeable & Cleanable: All-metal construction (no polymers in the sealing path when used with metal seals) allows for high-temperature bake-out to remove contaminants and achieve ultra-high vacuum conditions.
Robust Construction: Manufactured as welded diaphragm bellows or hydroformed bellows, ensuring durability and long cycle life under repeated flexure.
Low Effective Stroke Force: Requires relatively low force to compress or extend, minimizing load on adjacent components.