Transition elbow 90° - with male thread - N - 35mm-R5/4" IVAR.IVN31

Product detailed description

This 90° transition elbow is used in heating, sanitary, fire protection, and industrial systems to connect press-fitted pipes with threaded components. It is commonly found in residential and commercial buildings where hybrid piping solutions are required. Installers working with mixed pipe technologies—such as stainless steel press systems and threaded valves or pumps—will benefit from this component’s precise fit and durability.

The elbow ensures reliable connections between press and threaded components, allowing for flexibility in system design while maintaining hydraulic integrity. Its construction supports long-term performance in environments with fluctuating temperatures and moderate pressures. Proper installation is critical to prevent leaks and ensure compliance with system standards.

Technical parameters

Material	Stainless steel grade Wst. Nr. 1.4404 (AISI 316L), EPDM O-ring
Operating temperature	-20 °C
Nominal pressure	PN 16
Code	IVN31.3514
Brand	IVAR

The rated pressure of PN 16 indicates suitability for low-pressure systems typically found in domestic and light industrial applications. The operating temperature range from -20°C up to +120°C allows for use in both cold water supply and heated systems. These parameters help determine correct fitting selection based on system conditions and fluid type.

Installation and connection

To install, align the press tool with the designated marking on the elbow and apply sufficient force until the indicator reaches the specified dimension. The connection size is 35 mm internally and R5/4" externally. Ensure the mating press pipe and threaded component are free of debris and damage before assembly. Common installation errors include insufficient pressing depth or using incorrect tools. Always verify the press mark aligns with the indicator and that the sealing groove is undamaged. Avoid overtightening the threaded end, which can distort the fitting and compromise the seal.

Compatibility and accessories

This elbow is compatible with press systems using 35 mm stainless steel tubing and components with R5/4" external threads. For complete system integration, ensure all press connections are sealed with compatible O-rings and that threaded joints are properly sealed with PTFE tape or thread compound. No specific accessories are required beyond standard press tools and sealing compounds. Check that all adjacent components meet the same pressure and temperature ratings.

Technical background for designers

This elbow functions by transferring flow direction through a 90° bend between press and threaded systems. The stainless steel body offers resistance to corrosion and thermal expansion, making it suitable for environments with varying temperatures. The EPDM sealing ring provides a flexible, durable seal against leakage. The choice of material ensures long-term reliability in aggressive fluids such as those found in solar or chemical systems. Designers should account for thermal stress and expansion when integrating into large systems. The elbow’s PN 16 rating means it cannot be used in high-pressure steam applications. System layout must allow for adequate clearance around the elbow to accommodate expansion and installation tools.

Service and operation

Routine inspection should focus on the integrity of the press joint and the condition of the sealing ring. Any signs of wear, distortion, or leakage should prompt replacement of the affected component. There are no defined service intervals since the fitting is designed for long-term use under normal conditions. Periodically check for any mechanical stress caused by improper support or misalignment. If the system is exposed to extreme temperatures outside the stated range, re-evaluate the fitting’s suitability.

Frequently asked questions

Can this elbow be used in solar heating systems?
Yes, provided the system operates within the temperature range of -20°C to +120°C and does not exceed the PN 16 pressure rating.

Is the sealing ring replaceable?
No, the EPDM O-ring is integrated into the fitting and is not designed for separate replacement after installation.

Reinstall the component using the correct pressing technique.

Can this elbow be used in fire suppression systems?
Yes, it is suitable for such systems due to its robust construction and ability to handle cold and hot water under moderate pressure.