AQUASTOP IVAR.AC 618 cold water circulation stop valve – 1" F × 1" M
Code: 500495Related products
Product detailed description
The IVAR.AC 618 valve, sold as AQUASTOP (code 500495), is designed for systems that heat in winter and cool in summer through the same pipework. As long as warm heating water flows, the valve stays open. When the water temperature falls to +19 °C, the built-in thermostatic insert closes the flow, so chilled water no longer reaches radiators or bathroom towel rails, where moisture would otherwise condense on the surface.
Location and installation
- the valve must be fitted upstream of the heat emitter, i.e. on its inlet
- the manual recommends installing it below the manifold at the system inlet
- observe the flow direction marked by an arrow on the valve body
- install the fitting stress-free with a suitable spanner; excessive tightening torque can damage the body
Technical data
- connection 1" female thread × 1" male thread
- max. operating pressure 10 bar, max. operating temperature +80 °C
- closing temperature +19 °C ± 1.5 °C, max. differential pressure across the valve 1 bar
- nickel-plated brass CW617N body, stainless steel shut-off parts, EPDM O-ring
Suitable thread sealants are PTFE tape, cord or thread, sealing pastes or gels. Hemp is not recommended because of the risk of overtightening and cracking the body. The IVAR.AC 618 range also includes version 500522 with a 3/4" F × Eurocone connection.
Technical data
| Code | 500495 |
| Manufacturer | IVAR |
| Type | IVAR.AC 618 (AQUASTOP) |
| Kind | thermostatic cold water circulation stop valve |
| Connection | 1" F × 1" M |
| Closing temperature | +19 °C ± 1.5 °C |
| Max. operating pressure | 10 bar |
| Max. operating temperature | +80 °C |
| Max. differential pressure | 1 bar |
| Body material | nickel-plated brass CW617N |
| Shut-off parts | stainless steel |
| Seal | EPDM O-ring |
Frequently asked questions
When does the AQUASTOP valve close?
When the temperature of the water flowing through drops to +19 °C (tolerance ±1.5 °C), the thermostatic insert closes. With warmer heating water, the valve stays open.
Where is the valve installed?
Upstream of the heat emitter, i.e. on its inlet. The manual also recommends fitting it below the manifold at the system inlet, always in the direction of the arrow on the body.
What should the threads be sealed with?
PTFE tape, cord or thread, sealing pastes or gels are suitable. Hemp is not recommended because of the risk of overtightening and damaging the body.
What connection does this version have?
Code 500495 has a 1" female thread on one side and a 1" male thread on the other. Version 500522 has a 3/4" F × Eurocone connection.
Additional parameters
| Category: | accessories for system boards |
|---|---|
| Warranty: | 24 |
| Type: | fitting / valve |
| Code: | 500495 |
| Manufacturer: | IVAR |
| Type: | IVAR.AC 618 (AQUASTOP) |
| Kind: | thermostatic cold water circulation stop valve |
| Connection: | 1" F × 1" M |
| Closing temperature: | +19 °C ± 1.5 °C |
| Max. operating pressure: | 10 bar |
| Max. operating temperature: | +80 °C |
| Max. differential pressure: | 1 bar |
| Body material: | nickel-plated brass CW617N |
| Shut-off parts: | stainless steel |
| Seal: | EPDM O-ring |
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IVAR designs, develops and manufactures highly energy-efficient heating and plumbing systems. We have over 10,000 catalogue items - mass-produced products and unique items - in addition to customised systems and combinations of complex products. And it’s all “Made in Italy”.
Vision
To make life easier for our clients, our clients' customers and our employees, thanks to our ability to be constantly innovative.
Mission
To design and manufacture advanced hydronic solutions that reduce installation complexity and energy consumption.
“Made in Italy” adds value
IVAR has been producing heating and plumbing system components since 1985: valves for heating bodies, direct heat metering modules, heat cost allocators, pipes and fittings, substations for heating systems, distribution manifolds, radiant panel systems, and components for solar and geothermal systems. And it’s all “Made in Italy”.
Over 200 people are employed at our manufacturing facilities in Prevalle (in northern Italy’s Brescia province). The site has been designed to streamline our many production and operational stages.
The Italian headquarters also acts as a hub for the wider IVAR Group, set up with the goal of distributing products beyond Italy’s borders. The group now has 11 branches, in Australia, Belgium, China, Germany, the United Kingdom, the Czech Republic, Romania, Slovakia, Spain, the United States and Tunisia.
Know How
Research, development and numerous laboratory tests guarantee that our clients’ requests can be translated into new high-efficiency products.
The stages required for production take place internally, beginning with hot forming, which is carried out at our subsidiary Valmon Stampati. Our continuous implementation of projects under the Industry 4.0 initiative also allows us to take full advantage of new releases in technology and IT to improve our manufacturing efficiency.
As a company, IVAR is constantly evolving. Every day, we invest in strengthening our products, in improving our production processes and in attaining new patents and certifications.