General
Material	PVC -
Colour	Grey -
Temperature range	-25 °C
Approvals	VDE-tested in accordance with EN IEC 61386-25 -
Features	Extremely flexible -
Application range	machine engineering -
Construction	helically wound plastic hose -
Internal construction	plastic-insulated spring steel wire helix -
Material outer sheath	soft PVC jacket -

The plastic protection hose AIRflex-KUW-PVC-AS, type AD27, from Flexa is a helically wound protection hose for use in industrial and technical installations. It consists of a soft PVC sheath enclosing a plastic-coated spring steel wire helix. The grey colour and flexible structure make it suitable for various applications in machine building, plant engineering, vehicle construction, shipbuilding, automation, and electrical installations. The hose is available in a package with a length of 10 metres and is particularly suitable for use in cable chains as well as suction hoses.

Applications
This protection hose is designed for use in technical installations where high flexibility and mechanical load capacity are required. It is frequently used in automation technology, machine building, and vehicle construction, where cables and lines must be protected against mechanical stress, dust, and moisture. Use in cable chains enables safe and movable cable guidance for moving machine parts. The air- and fluid-tight construction also makes it suitable for applications requiring sealing against environmental media.

Functions and equipment in detail
The hose is characterised by its highly flexible structure, allowing easy bending and adaptation to different geometries. It is stretchable and compressible, making it especially suitable for movable installations. The soft PVC sheath provides high protection against mechanical damage and ensures a smooth surface. The internal spring steel wire helix ensures stability and shape retention, while the plastic sheath provides internal corrosion protection. The hose is largely resistant to acids and oils, making it suitable for environments with aggressive chemicals. Additionally, it is silicone- and cadmium-free, increasing compatibility in sensitive applications.

Technology explained simply
The protection hose consists of a spring steel wire wound in a helix and surrounded by a soft PVC sheath. This construction enables high flexibility combined with mechanical stability. The PVC sheath protects the internal wire from corrosion and provides a tight covering. The temperature resistance from -25 °C to +90 °C (with sources indicating +100 °C) makes the hose suitable for applications with varying temperatures. The approvals according to EN IEC 61386-25 and VDE-tested guarantee compliance with European safety and quality standards. Conformity with REACH and RoHS ensures the use of environmentally compatible materials. The UL_LLC approval refers to certification by Underwriters Laboratories, confirming safety in certain markets.

Compatibility and accessories
The protection hose can be combined with various cable glands and end caps to create secure connections to cables or lines. Suitable accessories include plastic cable glands such as LKI-P AD27-PG21 or LKI-M AD27-M32, which are rotatable and made of polypropylene. Metal cable glands such as US-M AD27-M25 made of nickel-plated brass or USW-M AD27-M32 in 90° angle form offer additional mechanical stability. Hose clamps such as SKM AD27-29 made of galvanised steel with rubber insert are used to secure the hose to devices or structures. End caps such as EK AD27 or EEK AD27 enable clean end connections for the hose.

Installation and mounting
Installation is carried out by simply tightening the cable glands or clamps at the ends of the hose. The rotatable plastic cable glands allow easy alignment and mounting at various connection points. The hose clamps are tightened using a screwdriver or pliers to securely fix the hose. When mounting in cable chains, care should be taken to avoid excessive loading on the hose and to ensure that the bending radii are not undershot to guarantee service life.

Advantages in operation
The protection hose offers high mechanical stability and flexibility, making it especially suitable for movable installations. The air- and fluid-tight construction protects the cables installed inside from environmental media. Resistance to acids and oils increases service life in demanding environments. The approvals according to EN IEC 61386-25 and VDE-tested guarantee safety and quality. The use of environmentally compatible materials (REACH, RoHS) meets current environmental standards. Compatibility with various cable glands and accessories allows flexible adaptation to different requirements.