Automatic refilling unit, NA228S
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| The NA228S automatic refilling unit with DVGW-tested backflow preventer permits the fixed connection of closed or open heating or cooling systems to the drinking water supply network.
It integrates a backflow preventer, a check valve and a water meter in a single unit. It maintains pressure between upper and lower limits, prevents backflow, back syphonage or back pressure of the heating or cooling water into the potable water network. Limitation of refilling time is possible as well as the facility for fast and automatic refilling of the system. In addition, a build up of steam caused by pressure loss is prevented. |
| For closed or open hydronic heating or cooling systems. |
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| Approvals |
Components DVGW approved |
| Max. media temperature |
120 oC |
| Additional description |
Also see product data sheets. |
| Description | Additional Product Type |
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| Water meter | 0903110 | | Pressure switch (for NA 228 S-A only) | 0903111 | | Time relay | 0903112 | | Operating time meter (not for NA 228 S-C) | 0903113 | | Changeover valve | 0901407 | | Discharge tundish | 0901340 | | Pressure gauge | M07K-A16 | | System pressure gauge | M228S-A8 |
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