This replacement bag is used in expansion vessels for heating and plumbing systems where a 2L capacity is required. It is typically installed in residential and commercial buildings to accommodate thermal expansion in closed systems. The butyl material ensures compatibility with a range of fluids and system conditions. Installers and technicians working on expansion vessel maintenance or replacement will find this component essential for restoring system functionality.

When replacing the internal bladder in an expansion vessel, it is important to ensure the correct model is selected based on the vessel’s capacity and design. This replacement bag is specifically designed for 2L systems and must be installed in accordance with the manufacturer’s guidelines to maintain system performance and safety.

Technical parameters

Code	Q110008
Brand	IVAR

The product is designed for use in 2L expansion vessels. The butyl material is selected for its flexibility and resistance to common system fluids. The bag must be correctly sized to the vessel to ensure proper operation and prevent premature failure due to over- or under-expansion.

Installation and connection

The replacement bag is installed inside the expansion vessel housing. The process involves removing the old bladder, cleaning the interior, and the new bag according to the manufacturer’s instructions. It is important to ensure that the bladder is seated correctly and that all connections are secure. Common installation mistakes include improper seating of the bladder or failure to check for internal debris before installation. Always verify that the vessel is depressurised and drained before beginning the replacement process.

Compatibility and accessories

This replacement bag is compatible with IVAR AC expansion vessels with a 2L capacity. To complete the replacement, the IVAR.NPEL replacement flange may also be required. Ensure that all components are from the same system design to maintain compatibility and system integrity.

Technical background for designers

The replacement bag functions as a flexible barrier within the expansion vessel, separating the system fluid from the air chamber. The butyl material is chosen for its durability and resistance to swelling or degradation in contact with and glycol-based fluids. The bladder must be correctly sized to allow for thermal expansion without over-stressing the material. The design of the vessel and the bladder must also account for the pressure and conditions of the system to ensure long-term performance.

Service and operation

Regular inspection of the expansion vessel is recommended to ensure the bladder remains intact and functional. Check for signs of wear, such as cracks or swelling, and ensure the vessel is operating within its pressure and temperature limits. If the bladder is damaged, it must be replaced immediately to prevent system failure. No specific service intervals are provided in the brief; refer to the manufacturer’s technical documentation for detailed maintenance recommendations.

Frequently asked questions

Can the IVAR Q110008 be used in expansion vessels other than AC models?
No, this replacement bag is specifically designed for use with AC expansion vessels with a 2L capacity.

Is the butyl material compatible with glycol-based fluids?
Yes, the butyl material is suitable for use with glycol-based fluids commonly found in heating systems.

What should be checked before installing the new bag?
Before installation, ensure the vessel is depressurised, drained, and free from internal debris. Also, verify that the vessel model matches the bag’s specifications.

Is the IVAR.NPEL flange always required with this bag?
It depends on the vessel design. The IVAR.NPEL flange is recommended for complete replacement and should be used if the existing flange is damaged or worn.