Straight fitting - pipe/internal thread - 50x6/4"; PE/external thread FIV.07710

Product detailed description

This straight fitting is used in heating and plumbing systems where a 50 mm PE pipe must be connected to an external thread. It is commonly installed in residential and commercial buildings for water supply, heating circuits, and irrigation systems. The fitting ensures a secure and leak-free connection between the flexible PE pipe and rigid threaded components, such as valves, meters, or manifolds. It is particularly useful in systems where the PE pipe is embedded in walls or floors, and a transition to a rigid connection is required.

Installers and technicians working with hybrid systems that combine flexible and rigid piping will find this fitting essential for maintaining system integrity. The design allows for straightforward installation and alignment, ensuring compatibility with standard PE pipe and thread sizes.

Technical parameters

The PN 16 rating indicates that the fitting is suitable for systems operating at a maximum pressure of 16 bar. The operating temperature range from -20 °C to +90 °C makes it suitable for both cold and hot water applications. These parameters are critical for selecting the correct fitting for the intended system conditions and ensuring long-term performance.

Installation and connection

To install the fitting, the PE pipe is first cut to the correct length and deburred. The pipe is then inserted into the fitting body, and a clamp ring and O-ring are used to secure the connection. The external thread is tightened to the corresponding component using a wrench. It is important to ensure that the PE pipe is fully seated and that the clamp ring is properly positioned to prevent leaks. Common installation mistakes include insufficient tightening, misalignment of the pipe and thread, and using incorrect tools that may damage the fitting or pipe.

Compatibility and accessories

This fitting is compatible with standard 50 mm PE pipe and 4 inch external thread components. It is designed for use with brass clamping rings and NBR O-rings, which are included as part of the fitting. No additional accessories are required for standard installation. It is important to use compatible PE pipe and fittings to ensure a secure and leak-free connection.

Technical background for designers

The fitting operates by compressing the clamp ring and O-ring around the PE pipe when the external thread is tightened. The brass CW617N body provides durability and resistance to corrosion, while the NBR O-ring ensures a watertight seal. The PN 16 rating and temperature range are essential for system design, as they determine the maximum operating conditions the fitting can withstand. The integration of the fitting into the system depends on the alignment of the PE pipe and the external thread, as well as the quality of the installation.

Service and operation

During operation, the fitting requires no regular maintenance. However, it is important to periodically check for leaks, especially at the connection points. If a leak is detected, the fitting should be inspected for damage or wear and, if necessary, replaced. The O-ring should be checked for signs of degradation, particularly in systems operating at high temperatures or with aggressive media.

Frequently asked questions

Can the fitting be used with PE pipe of a different diameter?
No, the fitting is specifically designed for 50 mm PE pipe and cannot be used with other diameters.

Is the fitting suitable for use with hot water?
Yes, the fitting is rated for operating temperatures up to +90 °C, making it suitable for hot water applications.

Can the fitting be used in underground installations?
Yes, provided the installation is in accordance with local standards and the fitting is protected from mechanical damage.

What tools are required for installation?
A standard wrench is required to tighten the external thread. No special tools are needed for the PE pipe connection.