Press-fit systems are widely used in modern heating and plumbing installations due to their speed and reliability. Installers working on central heating circuits, fire suppression systems, compressed air lines and industrial piping often rely on press-fit components for secure and leak-free connections. These systems operate under a range of conditions, from low-temperature cold water distribution to high-temperature heating circuits, and require sealing elements that remain stable over time. The correct choice of O-rings ensures long-term integrity and minimises the need for rework or maintenance.

In press-fit systems, the O-ring is compressed between the pipe and fitting during installation, forming a tight seal. This method eliminates the need for welding or threading, reducing installation time and potential errors. The sealing performance depends on accurate sizing, proper installation technique and compatibility with the system’s operating parameters. For systems requiring flexibility in design and material resistance, such as those exposed to fluctuating temperatures or non-potable fluids, the correct O-ring material becomes critical.

Technical parameters

Operating temperature	-20 °C
Nominal pressure	PN 16
Code	I002851
Brand	IVAR

The operating temperature range and nominal pressure define the system environments where this O-ring can be safely applied. A minimum operating temperature of -20°C ensures functionality in cold environments, while the PN16 rating supports hydraulic systems with pressures up to 16 . These values are essential when selecting sealing components for closed-loop systems such as heating circuits or fire protection lines.

Installation and connection

The O-ring is inserted into the groove of the press-fit fitting prior to connecting the pipe. The pipe is then pressed into the fitting using a suitable tool until the press mark is reached. The connection size must match the internal diameter of the pipe and the external diameter of the fitting. During installation, ensure the O-ring is seated correctly and free of damage. Common mistakes include improper insertion depth or contamination of the sealing surface, which can compromise the integrity of the joint.

Compatibility and accessories

This O-ring is compatible with press-fit fittings of the appropriate size and groove design. It is intended for use with pipes and fittings of the same nominal diameter. No additional sealing compounds or surface treatments are required. For complete press-fit systems, ensure that all components are from the same manufacturer or certified for mutual compatibility. Related products include press-fit fittings and pipes of matching dimensions and material.

Technical background for designers

The O-ring is made from FPM (fluorocarbon ), a synthetic elastomer known for its resistance to heat, oils and chemicals. Its mechanical properties allow it to maintain a stable seal under varying pressure and temperature conditions. When integrated into a press-fit system, the O-ring relies on the compressive force exerted by the fitting to create a barrier against leakage. The service life is influenced by the of thermal cycling, exposure to aggressive media and the quality of the installation.

Service and operation

During operation, the O-ring requires no active maintenance. However, periodic inspections should be carried out to detect signs of wear or deformation, particularly in systems with frequent pressure fluctuations or high temperatures. If the seal is found to be damaged or degraded, it should be replaced immediately to prevent system failure. There are no defined service intervals provided by the manufacturer.

Frequently asked questions

Can this O-ring be used in open systems?
This O-ring is suitable for closed pressurised systems. Use in open systems may affect its sealing performance and longevity.

Is it compatible with inert gases?
Yes, the O-ring is suitable for use with inert gases, provided the system operates within the specified pressure and temperature limits.

Can it be used with copper pipes?
No, this O-ring is designed for use with carbon steel pipes and fittings. Compatibility with copper is not guaranteed.

What is the maximum operating temperature?
The O-ring can operate continuously up to +85°C, with a short-term maximum of +120°C.