The NP series Dual Circuit flow center (NPD) is specifically designed for applications with two geothermal heat pumps. The NPD saves installation time and cost by eliminating the need for external T’s, additional piping, check valves, and pump sharing relays. The NPD incorporates flushing valves into the flow center so that the ground loop may be flushed without adding external flush ports. Flo-Link™ double O-ring transition fittings are available for most any application (PE fusion, PVC, threaded, etc.). Top or side connections to the ground loop add even more flexibility. Simply connect the ground loop to the 3-way valves at the top of the flow center (side or top connections) and the heat pumps to the side connections. The pump(s) on each circuit is energized only when that circuit’s heat pump is running. There is no easier method available on the market today for two-unit installations.
features:
• Choice of Grundfos UP26 constant speed pumps or UPMXL 25-124 variable speed pumps
• Selection of one or two pumps for each side
• Specifically designed for two unit applications
• Non-pressurized operation
• Built-in 3-way, 4-position valves allow flushing/purging air directly at the flow center
• Heavy gauge powder-coated steel cabinet
• Completely foam insulated cabinet helps prevent
condensation at low temperatures
• Pressure/vacuum relief never lets the tank
go into a vacuum or above 13 psig.
• Internal check valves on each circuit prevent short cycling
• Flo-Link™ double O-ring connections provide
union connections at the flow center
• Removable cap allow fluid level check, and provides convenient location to remove and check antifreeze levels
• Compatible with standard hose kits
• Saves energy by only energizing the pump(s)
needed when only one heat pump is running
• Allows pump replacement without reflushing
the ground loop
Click here for piping arrangement illustration
** Submittals will open in a new tab
| PN | Total Pumps | Left Pump(s) | Right Pump(s) | Volute | Connection | Photo |
|---|---|---|---|---|---|---|
| NPD2LL (Submittal) | 2 | (1)UPMXL 25-124 | (1)UPMXL 25-124 | Cast Iron | Flo-Link |  |
| NPD2NN (Submittal) | 2 | (1)UPMXL 25-124 INV | (1)UPMXL 25-124 INV | Cast Iron | Flo-Link | Coming Soon |
| NPD3MA (Submittal) | 3 | (1)UPS26-99+(1)UPMXL | (1)UPS26-99 | Cast Iron | Flo-Link | Coming Soon |
| NPD3PN (Submittal) | 3 | (1)UPS26-99+(1)UPMXL INV | (1)UPMXL INV | Cast Iron | Flo-Link | Coming Soon |
| NPD3ML (Submittal) | 3 | (1)UPS26-99+(1)UPMXL | (1)UPMXL | Cast Iron | Flo-Link | Coming Soon |
| NPD2LA (Submittal) | 2 | (1)UPS26-99 | (1)UPMXL | Cast Iron | Flo-Link |  |
| NPD2NA (Submittal) | 2 | (1)UPS26-99 | (1)UPMXL INV | Cast Iron | Flo-Link |  |
| 1304 (Submittal) | 2 | (1)UPS26-99 | (1)UPS26-99 | Cast Iron | Flo-Link |  |
| 1305 (Submittal) | 3 | (2)UPS26-99 | (1)UPS26-99 | Cast Iron | Flo-Link |  |
| 1306 (Submittal) | 4 | (2)UPS26-99 | (2)UPS26-99 | Cast Iron | Flo-Link |  |
| 1307 (Submittal) | 2 | (1)UP26-116 | (1)UP26-116 | Cast Iron | Flo-Link |  |
| 1308 (Submittal) | 3 | (2)UP26-116 | (1)UP26-116 | Cast Iron | Flo-Link | Coming Soon |
| 1309 (Submittal) | 4 | (2)UP26-116 | (2)UP26-116 | Cast Iron | Flo-Link | Coming Soon |
| NPD4DD | 4 | (2) UPS60-150 | (2) UPS60-150 | Cast Iron | 2" Socket Fusion | Coming Soon |
| PN | Description | U.O.M | Photo |
|---|---|---|---|
| 4008 | Replacement Cap, 3-1/2", NP Flow Center | Each |  |
| 3786 | Valve, 1" FPT x 1" MPT, Ball. Full Port, Brass | Each |  |