Insulation Elbow K-flex K-FLEX® PU with PVC Jacket 20 x 28

K-flex K-FLEX® PU insulation elbow with PVC jacket, size 20 x 28, is a pre-formed thermal insulation component engineered for insulating pipe bends in heating, ventilation and air-conditioning (HVAC) systems and industrial piping. The elbow combines a closed-cell polyurethane (PU) foam core with a protective PVC outer jacket to reduce thermal losses, limit condensation risk and provide basic mechanical protection for elbow sections where continuity of insulation is required.

Advantages

The PU foam core offers low thermal conductivity and a closed-cell structure that resists moisture absorption, while the PVC jacket delivers abrasion resistance and easy cleaning. Pre-formed shape ensures uniform thickness and fast installation at elbows without the need for extensive on-site shaping. The product is dimensioned for compact bend sections and is compatible with standard pipe insulation systems to maintain continuous thermal performance across fittings.

Suitable for

• Thermal insulation of pipe bends in HVAC systems
• Insulated elbows in hot and chilled water distribution
• Industrial piping where mechanical protection and condensation control are needed
• Applications requiring quick installation of pre-formed bend insulation

Key specifications

• Material: closed-cell polyurethane (PU) foam core with PVC outer jacket
• Shape: pre-formed elbow designed for pipe bends
• Size: 20 x 28 (nominal dimensions for use with corresponding insulated pipe runs)
• Thermal performance: low thermal conductivity of PU foam suitable for thermal loss reduction
• Moisture resistance: closed-cell structure reduces water absorption
• Mechanical protection: PVC jacket provides abrasion resistance and ease of cleaning

How to use

Fit the insulation elbow over the pipe bend so that the pre-formed curvature matches the pipe geometry and maintains continuous contact with the adjacent straight-run insulation. Secure seams and joints according to standard installation practice for thermal insulation, using compatible adhesives, tape or mechanical fasteners as required to achieve a tight seal. Ensure surfaces are clean and dry before installation to promote good adhesion and to minimize the risk of trapped moisture.

Usage recommendations

For best performance, verify compatibility of the elbow dimensions with the existing insulated pipe diameter and adjacent insulation thickness. Follow local building codes and system design requirements for thermal insulation and vapor barriers. Avoid prolonged exposure of the PVC jacket to direct sunlight or aggressive chemicals; where necessary, provide additional UV protection or chemical shielding.