Arc 45° - N - 108mm IVAR.IVN22

Product detailed description

This press-fit reducing elbow is commonly used in industrial, HVAC, medical gas, and solar applications where precise flow control between dissimilar pipe diameters is required. Installers working in commercial and institutional buildings often integrate these fittings into closed-loop systems such as radiant floor heating, compressed air lines, and fire suppression networks. The design allows for rapid and secure connection without welding or threading, ensuring leak-free performance in environments subject to thermal cycling.

The fitting is typically installed in dry or semi-dry locations where the media remains non-corrosive and inert. Its compact 45° geometry helps reduce space constraints in tight mechanical rooms and facilitates directional changes in piping layouts. It is important to ensure that the system design accounts for expansion, contraction, and load-bearing requirements to avoid stress on the press joint over time.

Technical parameters

Material	Stainless steel grade Wst. Nr. 1.4404 (AISI 316L), EPDM O-ring
Operating temperature	-20 °C
Nominal pressure	PN 16
Code	IVN22.108
Brand	IVAR

The nominal pressure rating of PN 16 indicates suitability for medium-pressure applications. The operating temperature range from -20°C to +85°C, with a maximum of +120°C, determines the thermal limits during installation and commissioning. These parameters are essential when selecting compatible components for systems involving hot water, steam condensate, or industrial gases.

Installation and connection

To install the IVAR IVN22.108, begin by preparing the pipe ends: clean and deburr both DN 108mm and DN 54mm pipes to remove any contaminants or burrs. Insert the smaller pipe into the press end of the fitting until it reaches the stop mark. Use a calibrated press tool to apply force evenly around the circumference of the ferrule. After pressing, verify the presence of the tool’s imprint and inspect the alignment. Ensure that the larger end is fully seated against the adjacent flange or component to prevent misalignment under operational loads. Common installation errors include insufficient cleaning of the pipe ends, improper seating of the press end, and failure to follow the manufacturer's torque specifications. These can compromise the integrity of the joint and lead to leaks or premature wear.

Compatibility and accessories

This fitting is designed for use with standard press-fit stainless steel piping systems of the same grade (Wst. Nr. 1.4404 / AISI 316L). It requires compatible press tools capable of handling 45° elbows of this size. For systems requiring additional support, consider installing expansion joints or fixed anchors near the fitting to manage thermal movement. No additional sealing compounds or gaskets are needed, as the EPDM O-ring ensures a tight seal upon proper installation.

Technical background for designers

The fitting operates by compressing a ferrule around the pipe wall using a hydraulic or mechanical press tool. This creates a metal-to-metal bond reinforced by the EPDM O-ring, which compensates for minor surface irregularities. The stainless steel body offers resistance to corrosion and maintains structural integrity even after repeated thermal cycles. Designers should consider the expansion characteristics of the system and incorporate sufficient flexibility to accommodate dimensional changes due to temperature variations. The material's low thermal conductivity also reduces heat loss in hot-water systems.

Service and operation

Routine inspection should focus on visual checks for signs of leakage, corrosion, or mechanical damage. If the system is subjected to high-frequency vibrations, periodic re-inspection is advisable to confirm the stability of the press joint. In case of suspected failure, the fitting must be removed and replaced following standard decommissioning procedures. No scheduled maintenance is required beyond these inspections unless specified in the system’s operational manual.

Frequently asked questions

Can this fitting be used in steam condensate return systems?
Yes, provided the operating conditions remain within the stated temperature and pressure limits. The EPDM O-ring is suitable for condensate media as long as it does not contain aggressive additives.

Is the fitting compatible with existing copper piping?
No, the IVAR IVN22.108 is specifically designed for stainless steel press-fit systems and cannot be connected directly to copper or other incompatible pipe types.

What tools are required for installation?
A calibrated press tool compatible with 45° stainless steel press fittings is required. Always refer to the tool’s user manual and the manufacturer’s guidelines for correct pressing procedures.

How is the press-fit seal verified during installation?
The presence of a visible imprint from the press tool around the ferrule confirms that the joint has been correctly formed. A secondary verification method involves pressure testing the system after installation.

Documents for download

• SKTL_IVAR.IVN22 czver (PDF)
• CSTL_IVAR.IVN22 (PDF)