PRESS fitting stopper - N - 54mm IVAR.IVN51

Product detailed description

This press fitting stopper is commonly used in residential and commercial heating systems, fire suppression, and industrial installations. It is installed in stainless steel pipe systems where a secure and leak-free seal is required at the end of a run or branch. The stopper ensures system integrity during pressure testing and prevents unintended flow. It is particularly useful in closed-loop systems, such as solar thermal circuits or compressed air systems, where permanent sealing is necessary. Installers working in HVAC, plumbing and industrial sectors will find this component essential for completing pipe runs and ensuring system safety.

The IVN51.54 is engineered for use in environments with fluctuating temperatures and moderate pressure levels. Its robust design allows it to function reliably in a variety of media, including water, steam, inert gases and chemical solutions. The press fitting mechanism ensures a durable and vibration-resistant connection, making it suitable for both static and dynamic systems.

Technical parameters

Material	Stainless steel grade Wst. Nr. 1.4404 (AISI 316L)
Operating temperature	-20 °C
Nominal pressure	PN 16
Code	IVN51.54
Brand	IVAR

The nominal pressure rating of PN16 indicates that the fitting can handle a maximum operating pressure of 16 bar at standard conditions. The operating temperature range from -20°C to +85°C (with a peak of +120°C) means it is suitable for cold and hot water systems, as well as low-temperature industrial processes. These parameters are critical for determining the suitability of the stopper in specific applications and for selecting compatible system components.

Installation and connection

The IVN51.54 press stopper is installed using a dedicated press tool compatible with the fitting’s dimensions. The process involves inserting the stopper into the prepared pipe end and applying the correct pressing force until the indicator mark is reached. The press tool must be calibrated to ensure the correct deformation of the pipe wall around the fitting. The final step is to verify the seal by checking the alignment of the press marks and the absence of visible gaps. Common installation errors include insufficient pressing depth, misalignment between the pipe and fitting, or using an incorrect tool size. These issues can lead to leaks or reduced system performance. Always confirm the press depth using the tool’s indicator to ensure a reliable connection.

Compatibility and accessories

This press stopper is specifically designed for use with stainless steel pipes of the appropriate outer diameter and wall thickness. It is compatible with other IVAR press fittings and components within the same system. For complete installation, additional tools such as a pipe cutter and deburring tool are required to prepare the pipe ends. No special accessories are needed beyond standard press tools and measuring instruments. There are no alternative or related products specified for this model.

Technical background for designers

The IVN51.54 operates on the principle of mechanical deformation, where the press tool compresses the pipe wall around the fitting to create a permanent seal. The stainless steel grade 1.4404 (AISI 316L) offers high corrosion resistance and good mechanical strength, making it ideal for aggressive environments. The material’s low thermal expansion ensures dimensional stability under temperature fluctuations. When integrated into a system, the fitting must be aligned with the pipe axis to avoid stress points that could compromise the seal. The service life of the component is influenced by the quality of installation, the operating conditions and the compatibility of adjacent components.

Service and operation

Once installed, the IVN51.54 requires minimal maintenance. Regular visual inspections should be carried out to check for signs of wear, corrosion or mechanical damage. The integrity of the press joint can be verified by inspecting the alignment of the press marks and the absence of leakage. No scheduled service intervals are required for this component unless specified in the system’s maintenance plan. In case of suspected failure, the entire pipe section should be replaced rather than attempting to repair the fitting.

Frequently asked questions

Can the IVN51.54 be used in fire suppression systems?
Yes, the IVN51.54 is suitable for use in fire suppression systems due to its high-pressure and temperature resistance. It meets the requirements for nominal pressure PN16 and operating temperatures up to +120°C.

Is the IVN51.54 compatible with copper pipes?
No, the IVN51.54 is designed for stainless steel pipes only. Using it with copper would require different fittings and tools, and could lead to incompatibility issues.

How do I ensure the correct press depth during installation?
Use a press tool with an indicator that aligns with the stopper’s marking. Apply even pressure until the indicator reaches the correct position, then release and inspect the joint for proper deformation and alignment.

Can the IVN51.54 be reused after removal?
No, once the press joint is formed, the fitting cannot be reused. Any attempt to reuse it may compromise the integrity of the seal and lead to leaks.