Recirculating Hot Water Systems
Double Wall Parallel/Redundant Pre-Piped Single Temperature (DWPP-PR)
Flo-Rite-Temp Instantaneous Steam/Water Heater for Recirculating Hot Water Systems feature four double wall heat exchanger options offered as pre-piped parallel single temperature packaged assemblies.
Flo-Rite-Temp Double Wall (DW) Pre-Piped (P-P) Parallel (P) Recirculating (R) Single Temperature Systems are fully assembled and include the following installation components:
- Steam Trap
- Air Vent
- Thermometers
- CIP Connection Port
- Flow Control/Isolation Valves
- Thermostatic Diverting Valve
Ideal for both new construction and retrofit installation within an existing building infrastructure. Flo-Rite-Temp Double Wall (DW) Pre-Piped (P-P) Parallel (P) Recirculating (R) Single Temperature Systems are designed to fit through a standard 32" doorway (Model 8120 36" doorway).
The DW (double wall) version of the Flo-Rite-Temp instantaneous water heater uses a double-wall tube to provide positive separation of the steam and water in the heat exchanger. The area between the walls of the tubes vents to atmosphere so you can detect tube failure without cross-contaminating either the steam or water. The Flo-Rite-Temp DW is well suited for all hot water applications where steam is available and plumbing codes or safety requirements prevent the heating medium and the potable water supply from being cross-contaminated.
Armstrong Flo-Rite-Temp Instantaneous Steam/Water Heater pre-piped packages are available in 58 standard configurations.
Customized Hot Water System Solutions are our specialty. Multiple orientations, configurations and options are available.
Hot Water System Solutions which include condensate recovery, circulating pumps, additional mixed water temperature controls/loops and varied other components can be application engineered specifically to meet the projects requirements.
To learn more, go to the menu above.
| For submittal drawing refer to: |
| Model 415PP-PR |
Single Wall |
S5472 |
| Model 415DWPP-PR |
Double Wall |
S5518 |
| Model 535PP-PR |
Single Wall |
S5473 |
| Model 535DWPP-PR |
Double Wall |
S5519 |
| Model 665PP-PR |
Single Wall |
S5474 |
| Model 665DWPP-PR |
Double Wall |
S5520 |
| Model 8120PP-PR |
Single Wall |
S5475 |
| Model 8120DWPP-PR |
Double Wall |
S5521 |
| Flo-Rite-Temp Instantaneous Steam/Water Heater |
| Model |
Entering Water Temperature |
Outlet Temperature |
| 120 |
130 |
140 |
160 |
180 |
| 415DWPP-PR |
40 |
20 |
18 |
16 |
12 |
7 |
| 50 |
20 |
20 |
17 |
13 |
7 |
| 60 |
- |
20 |
19 |
14 |
7 |
| 535DWPP-PR |
40 |
45 |
39 |
34 |
26 |
16 |
| 50 |
45 |
43 |
37 |
28 |
17 |
| 60 |
- |
45 |
40 |
30 |
18 |
| 665DWPP-PR |
40 |
80 |
73 |
63 |
48 |
32 |
| 50 |
80 |
80 |
68 |
51 |
33 |
| 60 |
- |
80 |
75 |
55 |
35 |
| 8120DWPP-PR |
40 |
145 |
145 |
120 |
95 |
59 |
| 50 |
145 |
145 |
134 |
102 |
72 |
| 60 |
- |
145 |
145 |
115 |
90 |
Note: All flow rates in gallons per minute and using 15 PSIG steam. If unit is operated in parallel then double flow rate given for total available capacity.