Automatic vent valve - 3/4" IVAR.VARIA
Code: I00400340Related products
Product detailed description
This automatic vent valve is commonly used in residential and commercial heating and plumbing systems to ensure continuous and efficient air removal. It is typically installed in closed-loop systems such as underfloor heating, radiators, and circulation loops. The device helps maintain hydraulic balance by preventing air pockets, which can reduce system performance and increase energy consumption. During installation, it is important to verify the correct orientation and connection to ensure proper function.
Its compact design allows for integration into tight spaces, making it ideal for retrofitting existing systems or for new builds with space constraints. The valve is particularly suited for environments where frequent air accumulation is expected, such as in systems with long pipe runs or complex layouts. It operates passively, responding to pressure and temperature changes within the system to release trapped air automatically.
Technical parameters
| Material | Brass CW617N IVAR |
|---|---|
| Operating temperature | +110 °C |
| Nominal pressure | PN 10 |
| Code | I00400340 |
| Brand | IVAR |
The maximum operating temperature of +110 °C makes this valve suitable for high-temperature heating systems. The nominal pressure rating of PN 10 indicates its ability to withstand standard hydraulic conditions in most central heating applications. These specifications are essential for determining compatibility with the system’s thermal and hydraulic requirements. Designers should ensure that the system’s maximum operating pressure does not exceed the valve’s PN 10 rating to prevent mechanical failure.
Installation and connection
The valve is designed for 3/4 inch pipe connections using standard thread types. Prior to installation, the system must be depressurised, and the valve orientation verified to match the flow direction indicated on the body. The side plug must not be used for venting or any other function—only the upper manual stopper should be operated. Common installation errors include incorrect orientation, failure to close the manual stopper after venting, and use of non-standard sealing materials during assembly. Always use manufacturer-approved gaskets and tighten connections according to torque specifications to avoid leaks.
Compatibility and accessories
This valve is compatible with standard copper, steel, and PPR piping systems. It is typically used alongside pressure-reducing valves, expansion vessels, and circulation pumps to maintain system stability. For installations requiring additional protection against corrosion, nickel-plated versions of similar models are available. No special accessories are required for standard operation, though a wrench for tightening and a venting tool may be useful for commissioning.
Technical background for designers
The valve operates using a thermally sensitive mechanism that opens when air accumulates, allowing it to escape while retaining water. The brass CW617N material provides good resistance to corrosion and maintains structural integrity at elevated temperatures. Its integration into the system depends on the layout and the presence of other control devices. Long-term efficiency is influenced by the quality of the installation, the cleanliness of the system, and the absence of contaminants such as sludge or particulate matter. Regular inspection of the valve body and seal integrity is recommended to prevent degradation over time.
Service and operation
No specific service intervals are provided in the technical data. However, periodic visual inspections are advised to confirm the absence of leaks, blockages, or signs of wear. The manual stopper should be checked for smooth operation and sealed correctly after use. If the valve fails to vent air effectively, it may indicate internal clogging or damage to the operating mechanism. In such cases, disassembly and cleaning may be necessary, following the manufacturer’s guidelines.
Frequently asked questions
Can this valve be used in solar thermal systems?
Yes, provided the system’s operating temperature does not exceed +110 °C and the pressure remains within the PN 10 limit.
Is the side plug removable for cleaning or maintenance?
No, the side plug is not intended for removal and serves no function in the valve’s operation.
Can the manual stopper be left open during normal operation?
No, the manual stopper should be closed after venting to prevent uncontrolled air loss and system imbalance.
What is the difference between IVAR.VARIA and IVAR.VARIA TECNO variants?
The TECNO variant features nickel plating on the brass body, offering enhanced corrosion resistance in aggressive environments.
Additional parameters
| Category: | Vent valves |
|---|---|
| Weight: | 0.25 kg |
| Thread size: | 3/4" |
| Material: | brass |
| Material: | brass CW617N |
| Nominal pressure: | PN 10 |
| Operating temperature: | +110 °C |
| Posledná aktuálizacia ceny: | 13.04.2026 1:09:01 |
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