Product Description
Armstrong AX-20V Pre-Charged ASME Expansion Tank – 175 PSI – 11.0 gal (41.6 L)
The Armstrong AX-20V (175 PSI) is a high-pressure pre-charged ASME diaphragm expansion tank for closed hydronic systems in taller buildings and higher-pressure applications. It includes a ring base, lift ring, gauge and bladder integrity system. Tank volume is 11.0 gal (41.6 L) with an acceptance volume of 8.8 gal (33.3 L), rated for a maximum working pressure of 175 psi (1206 kPa).
| Model | AX-20V – 175 PSI |
| SKU | AX-20V-175 |
| Tank volume | 11.0 gal (41.6 L) |
| Acceptance volume | 8.8 gal (33.3 L) |
| System connection | 0.75" (19 mm) NPT |
| Maximum working pressure | 175 psi (1206 kPa) |
| Working temperature | -20°F to 240°F (-29°C to 115.5°C) |
| Factory pre-charge | 40 psi (276 kPa) standard, field adjustable |
| Shipping weight | 57 lb (25.9 kg) |
Design & Submittals
Materials of construction
- Shell: Steel
- Diaphragm: Heavy duty butyl
- Charging valve: 0.302"-32NC (standard tire valve)
Dimensions – inches (mm)
| A | B | D |
|---|---|---|
| 12.00 (305) |
25.00 (635) |
10.00 (254) |
A = diameter. B = height. D = ring base diameter. 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.
- Lift rings on models AX-40V to AX-280V.
- California code sight-glass and mounting clips available on request.
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.
