Sales (2)
| Title | Date Posted | Size | ||
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| Resideo Hydronic Heating Solutions Brochure (English) | 07/2021 | 4674780 kb |
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| Resideo Hydronic Heating Solutions Brochure (French) | 07/2021 | 4456147 kb |
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Install (6)
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| E121 Installation instructions (Multilanguage) | 05/2021 | 368485 kb |
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| E121 Automatic air vent Product Specification (English) | 05/2021 | 1264925 kb |
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| E121 Product Specification (Italian) | 05/2021 | 196414 kb |
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| E121 Specification Sheet (Polish) | 01/2024 | 1081280 kb |
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| E121 Automatic air vent Product Specification (German) | 01/2023 | 164722 kb |
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| E121S/E125S Installation instructions (Multilingual) | 04/2023 | 257924 kb |
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| Application | Air Ventilation |
|---|---|
| Controlled Media | Water-Glycol Mixture according to VDI 2035, Water mixture according to VDI 2035 |
| Color | Gold |
| Compatible With | Hot water heating systems, radiators, wall and ceiling mounted air heaters, air collection vessels, Not suitable for mineral oil or liquids with mineral-oil-based additives |
| For Use With | Z121-3/8A Shutoff Valve, Z121-1/2 Shutoff Valve, X121-AA Air vent cap with float |
| Product Height | 79 |
| Media Temperature (Max) | 110 °C |
| Product Length | 47 |
| Ambient Relative Humidity (Min) | 25% Non-condensing |
| Ambient Relative Humidity (Max) | 85% Non-condensing |
| Connection Size | G 1/2 in |
| Connection Type | External Thread |
| Operating Pressure (Max) | 10 bar |
| Seal Material | Heat-Resistant Elastomer |
| Body Material | Brass |
The E121 air vent is a reliable automatic venting device and is suitable for venting of air or gas from heating systems or heat process installations. With the Z 121 A shut-off valve fitted, cleaning or replacement of the seal and inner components can be carried out without draining the system.