Knee press 90°, 63 x 63

Product detailed description

Press elbows are essential components in modern pipe systems, particularly in residential and commercial buildings where compact layouts and efficient installation methods are required. In heating and plumbing applications, they allow for directional changes in piping without the need for welding or threading. This 90° press elbow is suitable for use in underfloor heating systems, central heating circuits, and hot water distribution networks. Installers often encounter these fittings in tight spaces, where precision alignment and secure connections are critical to system performance.

Correct selection and installation ensure long-term leak-free operation and compliance with system pressure and temperature requirements. The press connection method eliminates the need for additional tools beyond the press unit, making it ideal for high-volume installations. This fitting is commonly used in conjunction with ALPEX pipes and must be applied according to the manufacturer’s guidelines to maintain integrity under operational conditions.

Technical parameters

Installation and connection

Installation requires the use of a compatible press tool calibrated for ALPEX pipe systems. The elbow is positioned between two prepared pipe ends, ensuring correct alignment and squareness of the joint. The press sleeve must be fully seated before applying the press force. The press tool should be operated according to the manufacturer’s instructions to avoid under- or over-pressing, which can compromise the seal or cause deformation. After pressing, the connection should be visually inspected for proper sleeve displacement and alignment. Common mistakes include using incorrect tooling, failing to clean the pipe ends, or attempting to reuse sleeves after a failed press attempt.

Compatibility and accessories

This 90° press elbow is specifically designed for ALPEX pipes of equal diameter. It requires the use of a stainless steel sleeve and EPDM sealing ring, both of which are typically included with the fitting. For larger-scale installations, it is recommended to have a calibrated press tool and a supply of spare sleeves. No additional products are listed as related in the current database.

Technical background for designers

The press connection relies on mechanical deformation of the sleeve to create a tight seal between the pipe and the fitting. The nickel-plated brass body provides good thermal conductivity and dimensional stability under varying operating conditions. The stainless steel sleeve ensures durability and resistance to chemical exposure. Integration into the system requires careful planning to account for thermal expansion and contraction. The service life of the fitting is influenced by the quality of the press operation, the condition of the pipe ends, and the system’s operating parameters.

Service and operation

Once installed, the press elbow does not require regular maintenance. However, it is important to inspect the system periodically for signs of leakage or mechanical stress. Any suspected faults should be investigated immediately, as press connections cannot be easily repaired in the field. There are no defined service intervals provided in the technical data.

Frequently asked questions

Can this press elbow be used with other types of pipe besides ALPEX?
No, it is specifically designed for ALPEX pipe systems and will not provide a secure connection with other pipe materials.

Is it possible to re-use the sleeve if the initial press fails?
No, the sleeve must be replaced with a new one in the event of a failed press operation to ensure a reliable connection.

What is the significance of the CW617N material designation?
CW617N refers to a nickel-plated brass alloy that provides good corrosion resistance and mechanical strength suitable for press fitting applications.

Can the fitting be used in vertical or horizontal pipe runs?
Yes, the 90° press elbow is suitable for both vertical and horizontal installations, provided the system layout allows for proper alignment and support.