Automatic air separator - 1" IVAR.DISCAL 551

Product detailed description

In central heating and plumbing installations, air accumulation in pipelines can reduce efficiency and cause operational issues. This device is commonly used in residential and commercial buildings, especially in systems with long pipe runs or multiple zones. Installers often encounter situations where manual air venting is impractical or insufficient, making automated solutions essential for maintaining consistent flow and system performance.

Proper integration of air separation devices ensures that non-condensable gases are continuously removed from the system without the need for frequent manual intervention. This is particularly important in closed-loop systems where air pockets can form due to thermal expansion, pressure changes, or poor circulation. The correct selection and positioning of the device help prevent damage to pumps, radiators, and heat exchangers caused by air entrapment.

Technical parameters

Installation and connection

Installers should position the device in a vertical orientation with the arrow on the body aligned with the flow direction. The 1 inch connection requires a compatible pipe size and fitting, typically using NPT or BSPT threading depending on local standards. Before tightening, ensure that the sealing material is applied correctly to prevent leaks. A common mistake is incorrect orientation, which can block the air venting function. Always verify the system pressure and temperature limits match the device’s specifications before commissioning.

Compatibility and accessories

This model is designed for integration with standard heating and plumbing systems using copper, steel or plastic piping. It works well alongside pressure-reducing valves, filters and circulation pumps. For installations requiring additional control, a separate pressure gauge or flow meter may be needed. No specific accessories are required for basic operation, though proper sealing materials and mounting brackets should be available for secure installation.

Technical background for designers

The device operates via a float mechanism that opens the vent when air accumulates, allowing it to escape while preventing water loss. The brass CW617N body provides a balance between strength and corrosion resistance, while the stainless steel components ensure compatibility with chlorinated or softened water. The nominal pressure rating of PN 10 ensures the device can handle typical system pressures without deformation. Long-term performance depends on avoiding exposure to temperatures beyond +110 °C and ensuring the system is free from particulate matter that could clog the vent mechanism.

Service and operation

Regular visual inspections should confirm the device remains free from blockages and that the vent is functioning correctly. No scheduled service intervals are specified for this model, but any signs of reduced air removal efficiency should prompt a check for debris or corrosion. If the system is shut down for extended periods, ensure the device is not exposed to freezing conditions to avoid damage.

Frequently asked questions

Can this air separator be used in a domestic hot water circuit?
Yes, provided the circuit operates within the device’s pressure and temperature limits of PN 10 and +110 °C.

Is it suitable for use in a closed-loop heating system?
Yes, it is designed for continuous air removal in closed-loop systems, helping to maintain stable pressure and flow.

What sealing material should be used for the threaded connection?
A compatible thread sealant or PTFE tape should be applied to ensure a leak-free connection.

Can the device be installed horizontally?
No, it must be installed vertically with the arrow indicating flow direction to ensure correct operation of the float mechanism.