Armstrong Astro 2 Series Circulator Pumps Buyers Guide & Review
The Armstrong Astro 2 series of circulator pumps is designed for closed hydronic systems. This series is intended to circulate water or glycol solutions. The Astro 2 series is also designed to work up to 230°F and 150 psi while operating quietly and requiring zero maintenance.
Features
- Ceramic shaft and bearings
- Cross-reference information is printed on the box, for convenient access
- e-Coating on the inside of cast-iron volutes provides enhanced corrosion protection for improved reliability
- Flange-to-flange and bolt-to-bolt compatibility offers quick and easy exchange of competing models
- Plug-in terminal strip saves time
- High-flow check valve, is pre-installed for convenience. Where the installation does not call for a check valve, it can be removed in seconds
| ARMSTRONG ASTRO 2 SERIES CIRCULATOR PUMPS |

Armstrong Astro 2 Series Circulator Pumps
Model Comparison Chart
| Model |
Connection |
HP |
Voltage |
Material of Construction |
GPM |
Max. Head |
| 230CI |
Flanged |
1/25 |
115 |
Cast Iron |
18 |
18.2' |
| 230CI-R |
Flanged |
1/25 |
115 |
Cast Iron |
18 |
18.2' |
| 250CI |
Flanged |
1/20 |
115 |
Cast Iron |
18 |
24' |
| 250CI-R |
Flanged |
1/20 |
115 |
Cast Iron |
18 |
18.2' |
| 210CI |
Flanged |
|
115 |
Cast Iron |
34 |
16.5' |
| 250SS |
Flanged |
1/20 |
115 |
Stainless Steel |
18 |
24' |
| 225BS |
1/2" Sweat |
|
115 |
Bronze |
9 |
12' |
| 230SS |
Flanged |
1/25 |
115 |
Stainless Steel |
18 |
18.2' |
| 225BS |
3/4" Sweat |
|
115 |
Bronze |
9 |
12' |
| 220SSU |
Union |
|
115 |
Stainless Steel |
9 |
5.5' |
| 220SSU |
1/2" Sweat |
|
115 |
Stainless Steel |
9 |
5.5' |
| 225SSU |
Union |
|
115 |
Stainless Steel |
14 |
12.8' |
| 220SSU |
3/4" Sweat |
|
115 |
Stainless Steel |
9 |
5.5' |
| 280CI |
Flanged |
|
115 |
Cast Iron |
30 |
31.2' |
| 280CI |
Flanged |
|
230 |
Cast Iron |
30 |
31.2' |
| 290CI |
Flanged |
|
115 |
Cast Iron |
52 |
14.2' |
| 286CI |
Flanged |
|
230 |
Cast Iron |
35 |
40' |
| 286SS |
Flanged |
|
230 |
Stainless Steel |
35 |
40' |
| 210SS |
Flanged |
|
115 |
Stainless Steel |
34 |
16.5' |
| 290SS |
Flanged |
|
115 |
Stainless Steel |
52 |
14.2' |
| 280SS |
Flanged |
|
230 |
Stainless Steel |
30 |
31.2' |
| 280SS |
Flanged |
|
115 |
Stainless Steel |
30 |
31.2' |





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