General
Material	PVC
Colour	Grey
Temperature range	-25 °C
Temperature range short-term	+100 °C
Approvals	VDE-geprüft nach EN IEC 61386-25 / UK-CA / REACH und RoHS konform / UL_LLC
Features	highly flexible, stretchable and compressible, air- and fluid-tight, largely acid- and oil-resistant, silicone- and cadmium-free, internal corrosion protection
Construction	Spring-coiled plastic hose, plastic-insulated spring steel wire coil
Applications	machine construction, plant engineering, vehicle construction, shipbuilding, automation, electrical installations, use in energy chains, suitable as suction hose

The AIRflex-KUW-PVC-AS AD21 from Flexa is a helically wound plastic protection hose made of soft PVC, supplied in a 10-metre pack. It is suitable for use in technical installations and machinery, where flexible, extendable and compressible guidance of cables, lines or hoses is required. The hose consists of a spring steel wire helix coated with a grey PVC sheath, ensuring high flexibility and mechanical stability. The construction allows for air- and liquid-tight guidance, making it suitable for applications in damp or contaminated environments.

Applications
This protection hose is used in various industrial sectors, including machine building, plant engineering, vehicle construction, shipbuilding, automation and electrical installations. It is particularly suitable for use in guide chains, where it protects cables and lines from mechanical stress, dust and moisture. Due to its properties as a suction hose, it can also be used in systems involving suction processes. Its use in moving parts, such as movable machine components or robotic systems, is possible due to its high flexibility and extensibility.

Functions and Features in Detail
The protection hose is highly flexible and can elastically extend and compress without losing its shape or function. It is largely resistant to acids and oils, making it suitable for environments with aggressive chemicals. The material composition is free of silicone and cadmium, enhancing compatibility in sensitive applications. An integrated internal corrosion protection safeguards the spring steel wire helix against oxidation, extending the hose’s service life. The grey colour of the PVC sheath is standard and provides good visibility during use.

Technical Explanation
The protection hose consists of a spring steel wire helix covered with a soft PVC sheath. This structure ensures high mechanical strength while maintaining flexibility. The helical structure allows for elastic movement without the hose losing its shape. The PVC sheath protects the interior from external influences such as moisture, dust or chemical substances. The temperature resistance ranges from -25 °C to +90 °C, with short-term exposure up to +100 °C being possible. These values are suitable for use in industrial environments with varying temperatures.

Compatibility and Accessories
The AIRflex-KUW-PVC-AS AD21 can be combined with various cable glands and end caps to ensure secure attachment to machines or devices. Compatible accessories include plastic cable glands made of polypropylene (e.g. USK-P AD21-PG16), metal cable glands made of brass (e.g. US-P AD21-PG16), swivel plastic cable glands (e.g. LKI-M AD21-M25), and end caps for sealing the hose (e.g. EK AD21). These components allow for individual adaptation to different mounting conditions and connection types.

Installation and Mounting
Installation is carried out by attaching the appropriate cable glands to the ends of the hose. The cable glands are selected according to the connection type (e.g. PG socket, M20 or M25) and tightened securely. The protection hose can be mounted directly in guide chains or on movable machine parts. The extendable structure allows for easy installation without damaging the hose. Additional securing with hose clamps (e.g. SKM AD21-22) is possible to ensure firm anchoring.

Operational Advantages
The protection hose provides reliable protection for cables and lines in dynamic environments. Its high flexibility and extensibility reduce the risk of breaks or cracks during movement. The air- and liquid-tight construction protects the guided lines from environmental influences. Certifications according to EN IEC 61386-25, UK-CA, REACH, RoHS and UL_LLC confirm the safety and quality of the product. Its use across various industries demonstrates the universal suitability of the hose for demanding industrial applications.