Press bushing - sleeve nut EK, EK x 16

Product detailed description

Press bushings are commonly used in residential and commercial heating systems where flexible and durable connections are required. Installers working with ALPEX piping systems often need to connect to valves, radiators, or other components with Euroconic (EK) threads. This press bushing ensures a secure and leak-free connection in such applications, particularly in hydronic heating systems where thermal expansion and contraction are frequent.

The sleeve nut design allows for a reliable mechanical connection between the ALPEX pipe and the EK-threaded fitting. The press tool compresses the sleeve around the pipe, forming a tight seal. This type of connection is preferred in systems where space is limited and where frequent disassembly is not required. The nickel-plated brass body provides corrosion resistance, while the EPDM seal ensures flexibility and sealing performance under thermal cycling.

Technical parameters

Material	Nickel-plated brass CW617N
Operating temperature	+120 °C
Nominal pressure	PN 10
Weight	0.083 kg
Code	510017
Brand	IVAR

The operating temperature of +120 °C and nominal pressure of PN 10 are key factors in determining the suitability of this bushing for specific heating applications. These parameters ensure compatibility with standard heating system operating conditions. The material selection (nickel-plated brass and EPDM) also supports long-term performance in environments with moderate thermal stress and non-aggressive media.

Installation and connection

To install the press bushing, first ensure the ALPEX pipe is cut cleanly and free of burrs. Insert the pipe into the bushing until it reaches the stop mark. Align the sleeve nut with the EK-threaded fitting and hand-tighten to prevent misalignment. Use a suitable press tool compatible with the B-F-TH jaw type to compress the sleeve around the pipe. After pressing, verify the connection by checking for uniform compression and absence of visible gaps between the sleeve and the pipe. Common installation mistakes include over-pressing, which can damage the seal, and using an incorrect jaw type, which may result in an uneven press.

Compatibility and accessories

This press bushing is specifically designed for use with ALPEX pipes and EK-threaded fittings. It requires a press tool with jaws of type B-F-TH for proper installation. No additional sealing materials are needed, as the EPDM seal is integrated into the bushing. Installers should ensure that the pipe and fitting are compatible in terms of thread type and nominal diameter. No related products are listed for this model.

Technical background for designers

The press bushing operates by mechanically compressing the sleeve around the ALPEX pipe, creating a metal-to-metal seal supported by the EPDM gasket. The nickel-plated brass body offers good resistance to corrosion and wear, making it suitable for long-term use in heating systems. The Euroconic thread ensures a tight mechanical connection to the fitting. The service life and efficiency of the bushing depend on correct installation, proper press tool calibration, and the absence of mechanical stress from pipe movement or thermal expansion. Designers should account for these factors when planning system layout and connection points.

Service and operation

Once installed, the press bushing requires no regular maintenance. However, during system commissioning or inspection, it is advisable to check for signs of leakage or mechanical damage. If a connection fails, the entire bushing must be replaced, as the press connection cannot be re-used. No specific service intervals are provided in the technical data.

Frequently asked questions

Can this bushing be used with other pipe types besides ALPEX?
No, it is specifically designed for ALPEX pipes and may not provide a secure connection with other pipe materials or dimensions.

Is it compatible with press tools other than type B-F-TH?
No, the manufacturer specifies compatibility with B-F-TH jaws only. Using other jaw types may compromise the integrity of the connection.

Can the press bushing be re-pressed after initial installation?
No, the sleeve is designed for a single press operation. Re-pressing may cause deformation and reduce the effectiveness of the seal.

Is the EPDM seal resistant to thermal cycling?
Yes, the EPDM material is suitable for the operating temperature range specified and maintains its sealing properties under repeated thermal expansion and contraction.