Product Description
Armstrong AET 20x78 ASME Plain Steel Expansion Tank – 100 gal (379 L)
The Armstrong AET 20x78 is an ASME plain steel expansion tank (compression tank) for closed hydronic systems, including high-temperature systems up to 450°F. It has an NPT system connection, gauge glass tappings and a drain, with a base ring for vertical installation or optional saddles for horizontal mounting. Tank volume is 100 gal (379 L), rated for a maximum working pressure of 150 psi (1034 kPa).
| Model | AET 20x78 |
| SKU | AET-20X78 |
| Tank volume | 100 gal (379 L) |
| System connection (G) | 1.00" (25 mm) NPT |
| Shipping weight, galvanized | 187 lb (85 kg) |
| Maximum working pressure | 150 psi (1034 kPa) |
| Working temperature | -20°F to 450°F (-29°C to 232°C) |
| Shipping weight | 168 lb (76 kg) |
Design & Submittals
Materials of construction
- Shell: Carbon steel
- Head: Carbon steel
- Finish: Painted or galvanized
Dimensions – inches (mm)
| A | B | C | D | E | F |
|---|---|---|---|---|---|
| 20.00 (508) |
78.00 (1981) |
16.00 (406) |
10.00 (254) |
18.00 (457) |
1.50 (38) |
A = diameter. B = overall length. See the drawing for the location of C, D, E and F. Dimensions are for reference only; certified dimensions available on request.
Notes
- Not for domestic potable water systems.
- Designed and constructed per ASME Section VIII, Division 1.
- Gauge tappings included (gauge and fittings by others).
- Plugged inspection openings (qty 2, 2.0" each) on 175 to 505 gallon tanks.
- An inspection manhole (12" × 16") is furnished on the 525 gallon tank.
- Stand ring is not provided on AET 36×120 and AET 42×96.
Documents
Warranty
Covered by the Armstrong Fluid Technology manufacturer's warranty.
- Armstrong Terms of Sale & Warranty – Canada (PDF)
- Conditions de vente et garantie Armstrong – Canada, français (PDF)
Installation, Maintenance, Parts Kits & Manuals
Replacement parts and expansion tank sizing help – call (416) 236-2338 or email sales@bramhambros.com.
