T-piece 90° - unambiguous - N - 35mm IVAR.IVN40

Product detailed description

The 90° T-piece is commonly used in the installation of heating and plumbing systems in residential and commercial buildings. Installers often encounter the need to create branch connections in press-fitting systems, particularly when working with stainless steel piping. This fitting supports applications such as sanitary installations, fire suppression systems, solar thermal circuits and industrial gas systems. The design ensures secure and leak-free connections in press-fit systems, making it suitable for both new constructions and system upgrades.

Proper selection and installation of the T-piece are essential to ensure long-term performance and system integrity. It is typically used in closed-loop systems where thermal expansion and contraction are managed through appropriate design and material choices. The 90° geometry allows for directional changes in pipe routing, enabling efficient layout optimisation in confined spaces or complex configurations.

Technical parameters

Material	Stainless steel grade Wst. Nr. 1.4404 (AISI 316L), EPDM O-ring
Operating temperature	-20 °C
Nominal pressure	PN 16
Code	IVN40.35
Brand	IVAR

The operating temperature range of -20°C to +120°C makes the fitting suitable for both cold and hot water systems. The nominal pressure rating of PN 16 indicates the maximum allowable pressure under standard operating conditions, which is crucial for selecting the correct component for a given application. These parameters help determine compatibility with existing system pressures and fluid temperatures during design and installation phases.

Installation and connection

The T-piece features three press-fit connections, requiring a compatible press tool for installation. Before pressing, ensure the pipe ends are clean and free from burrs. The correct positioning of the O-ring groove is critical for forming a watertight seal. The fitting should be pressed until the indicator reaches the specified dimension of 54 mm. Common installation errors include insufficient pressing depth, incorrect alignment of the O-ring and using incompatible press tools. Always verify the fit by checking for movement resistance after pressing and inspecting the indicator alignment.

Compatibility and accessories

This T-piece is compatible with stainless steel press-fit piping systems using the same material and sealing ring type. It is intended for use with pipes of appropriate diameter and wall thickness as per the system design. Additional components such as straight or angled press fittings, valves and pipe segments may be required depending on the system layout. No specific accessories are mentioned in the technical documentation.

Technical background for designers

Constructed from stainless steel 1.4404 (AISI 316L), the T-piece offers high corrosion resistance and mechanical strength, making it suitable for aggressive media and fluctuating temperatures. The EPDM O-ring provides a flexible and durable seal, ensuring long-term tightness. In system design, the press-fit method eliminates the need for soldering or welding, reducing installation time and potential for leaks. The material properties also support thermal stability, reducing the risk of failure due to thermal cycling. System efficiency is maintained through minimal flow resistance and consistent sealing performance over time.

Service and operation

Regular inspection of the press-fit connections is recommended to ensure continued tightness and structural integrity. Check for signs of wear, corrosion or misalignment, especially in areas exposed to high thermal stress. No specific service intervals are provided in the technical documentation. In case of suspected leakage, the system should be depressurised and the fitting inspected for damage or improper pressing. Re-pressing is not recommended; replacement of the affected component is necessary.

Frequently asked questions

Can the T-piece be used in solar thermal systems?
Yes, it is suitable for solar thermal applications as it supports operating temperatures up to +120°C and is compatible with press-fit stainless steel piping.

Is the O-ring replaceable after installation?
No, the EPDM O-ring is integrated into the fitting and cannot be replaced once the press-fit connection is made.

Can this fitting be used in industrial gas systems?
Yes, it is approved for use in industrial gas systems provided the operating conditions match the technical specifications, including temperature and pressure limits.

What is the maximum allowable temperature for continuous operation?
The fitting is rated for continuous operation up to +85°C, with a short-term maximum of +120°C as specified in the technical data.