Product Description
Armstrong 30 Non-ASME Diaphragm Expansion Tank – 4.8 gal (18 L)
The Armstrong 30 is a compact non-ASME diaphragm expansion tank for hydronic systems. Its double-clamped butyl diaphragm maintains a permanent pressurized air cushion, preventing waterlogging and air absorption into the system, and avoiding nuisance relief valve discharge and unnecessary water make-up. Tank volume is 4.8 gal (18 L) with an acceptance volume of 3.0 gal (11 L), rated for a maximum working pressure of 100 psi (700 kPa, 7 bar).
| Model | 30 |
| SKU | NON-ASME-30 |
| Tank volume | 4.8 gal (18 L) |
| Acceptance volume | 3.0 gal (11 L) |
| Design | Design 1 |
| Process connection size (D) | 3/4" NPT |
| Process connection location (C) | top dead centre |
| Charge connection location (E) | bottom dead centre |
| Maximum working pressure | 100 psi (700 kPa, 7 bar) |
| Working temperature | 20°F to 240°F (-5°C to 120°C), non-freezing / non-boiling |
| Factory pre-charge | 12 psi (83 kPa), field adjustable |
| Shipping weight | 9 lb (4 kg) |
Design & Submittals
Materials of construction
- Shell process connection: Carbon steel, NPT male
- Shell finish: Enamel
- Diaphragm: Butyl, double clamped
- Charge connection: Schrader (standard tire) valve
Dimensions – inches (mm)
| A | B |
|---|---|
| 13.70 (348) |
10.60 (269) |
A = height. B = diameter. Dimensions are for reference only; certified dimensions available on request.
Notes
- Liquid: conditioned water, optionally with up to 50% propylene or ethylene glycol.
- Design 1 models may be hung directly from Armstrong ART series air removal traps connected to adequately supported piping; Design 2 and 3 models are free standing.
- Multiple tanks may be used for increased capacity.
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.
