Armstrong H Series Circulator Pumps Buyers Guide & Review
The Armstrong H series of in-line circulator pumps is suitable for domestic hot water systems. This series is built using a standard three-piece design that features a radially-split body, oversized shaft, centrifugal impeller, positive mechanical seal, and modular construction. The H series has been used by HVAC professionals for decades because it is cost-effective, durable, and easy to maintain.
Features
- Standard three-piece design with sleeve - oil lubricated bearing
- Radially-split body can be left in-line while servicing pump, eliminating disconnecting of pipes
- Oversized shaft made from special alloy steel
- Balanced centrifugal impeller ensures maximum water delivery in the HVAC system
- Proven seal design made from strong and long-lasting materials for extended operating life
- Three piece modular construction and back pull-out design for easy replacement of wear components
| ARMSTRONG H SERIES CIRCULATOR PUMPS |

Armstrong H Series Circulator Pumps
Model Comparison Chart
| Model |
Flange Size (NPT) |
HP |
Voltage |
Phase |
GPM |
Max. Head |
| H-32 |
Flanges Sold Separately |
1/6 |
115 |
1 |
36 |
12' |
| H-32 |
Flanges Sold Separately |
1/6 |
115 |
1 |
36 |
12' |
| H-41 |
1" |
1/6 |
115 |
1 |
21 |
17' |
| H-51 |
1" |
1/4 |
208-230/460 |
3 |
42 |
24' |
| H-52 |
1-1/4" |
1/3 |
208-230/460 |
3 |
52 |
26' |
| H-51 |
1" |
1/4 |
115 |
1 |
42 |
24' |
| H-52 |
1-1/4" |
1/3 |
115 |
1 |
52 |
26' |
| H-32 |
Flanges Sold Separately |
1/6 |
115 |
1 |
36 |
12' |
| H-53 |
1-1/2" |
1/2 |
208-230/460 |
3 |
80 |
28' |
| H-41 |
1" |
1/6 |
115 |
1 |
21 |
17' |
| H-53 |
1-1/2" |
1/2 |
115 |
1 |
80 |
28' |
| H-54 |
2" |
3/4 |
208-230/460 |
3 |
95 |
28' |
| H-54 |
2" |
3/4 |
208-230/460 |
1 |
95 |
28' |
| H-41 |
1" |
1/6 |
115 |
1 |
21 |
17' |
| H-63 |
1-1/2" |
1/2 |
208-230/460 |
3 |
34 |
33' |
| H-63 |
1-1/2" |
1/2 |
115 |
1 |
34 |
33' |
| H-64 |
1-1/2" |
3/4 |
208-230/460 |
3 |
55 |
45' |
| H-64 |
1-1/2" |
3/4 |
115 |
1 |
55 |
45' |
| H-66 |
2" |
3/4 |
208-230/460 |
3 |
102 |
30' |
| H-65 |
1-1/2" |
1 |
208-230/460 |
3 |
55 |
57' |
| H-52 |
1-1/4" |
1/3 |
208-230/460 |
3 |
52 |
26' |
| H-53 |
1-1/2" |
1/2 |
208-230/460 |
3 |
80 |
28' |
| H-51 |
1" |
1/4 |
115 |
1 |
42 |
24' |
| H-51 |
1" |
1/4 |
208-230/460 |
3 |
42 |
24' |
| H-67 |
2" |
1 |
208-230/460 |
3 |
132 |
36' |
| H-65 |
1-1/2" |
1 |
115 |
1 |
55 |
57' |
| H-52 |
1-1/4" |
1/3 |
115 |
1 |
52 |
26' |
| H-66 |
2" |
3/4 |
115 |
1 |
102 |
30' |
| H-68 |
2" |
1-1/2 |
208-230/460 |
3 |
142 |
46' |
| H-67 |
2" |
1 |
115 |
1 |
132 |
36' |
| H-53 |
1-1/2" |
1/2 |
115 |
1 |
80 |
28' |
| H-54 |
2" |
3/4 |
208-230/460 |
3 |
95 |
28' |
| H-54 |
2" |
3/4 |
115 |
1 |
95 |
28' |
| H-63 |
1-1/2" |
1/2 |
208-230/460 |
3 |
34 |
33' |
| H-63 |
1-1/2" |
1/2 |
115 |
1 |
34 |
33' |
| H-64 |
1-1/2" |
3/4 |
208-230/460 |
3 |
55 |
45' |
| H-64 |
1-1/2" |
3/4 |
115 |
1 |
55 |
45' |
| H-65 |
1-1/2" |
1 |
208-230/460 |
3 |
55 |
57' |
| H-66 |
2" |
3/4 |
115 |
1 |
102 |
30' |
| H-65 |
1-1/2" |
1 |
115 |
1 |
55 |
57' |
| H-66 |
2" |
3/4 |
208-230/460 |
3 |
102 |
30' |
| H-67 |
2" |
1 |
208-230/460 |
3 |
132 |
36' |
| H-68 |
2" |
1-1/2 |
208-230/460 |
3 |
142 |
46' |
| H-67 |
2" |
1 |
115 |
1 |
132 |
36' |



| MATERIALS OF CONSTRUCTION |


*For a full listing of repair parts, please refer to the repair parts manual*
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