Armstrong Design Envelope 4302 Dualarm Pumps
- Applications-HVAC system pumping; general purpose pumping; industrial/process pumping (water or glycol based)
Armstrong Design Envelope Pumps with integrated controllers are OSHPD pre-approved! - Description-Pipe-mounted 2-pump unit with integrated intelligent controls for space-saving installation, superior energy performance, and full redundancy or parallel-pumping operation. Saves up to 75% in energy over comparable traditional constant speed or variable frequency operated pump installations.
- Materials (MOC)-Cast iron or ductile iron casing, Cast iron or bronze impeller, Sintered silicon carbide mechanical seal
- Configuration-On-board Intelligent Variable Speed controls with Sensorless or Parallel Sensorless control. Controls enclosure UL type 12 or UL type 4X (outdoor applications). Available with NEMA premium motors. Outside balanced or inside single spring mechanical seal
- Performance range-Up to 1250 USgpm flow and 250 ft head (80 L/s, 76 m)
- Temperature-250°F (121°C)
- Power Range-0.33 hp to 75 hp (0.25 kW to 55 kW)
- Size –1″ to 8” (25 mm to 200 mm)
Description
Benefits & Features
Lowest installed cost
- Vertical In-line design eliminates the need inertia bases, housekeeping pads, and flex connectors and reduces piping requirements.
- 2-pump casing for reduced footprint.
- Integrated, intelligent controls eliminate the need for procurement, installation (incl. wiring), calibration and upkeep of differential pressure sensor.
- Superior energy performance qualifies for significant cost recovery under utility and government rebate programs.
- Design Envelope selections frequently recommend a smaller motor and/or pump which reduces installed cost.
Lowest operating cost
- Integrated intelligent controls – combined with perfect component match-up and tuning – for up to 75% in energy savings over traditional constant speed and variable frequency operated pumping installations.
- Available with Parallel Sensorless control (patent pending) to provide best-efficiency staging of both pumps for additional energy savings.
- Shorter pipe runs reduce system friction
Lowest energy consumption and carbon emissions
- Integrated intelligent controls – combined with perfect component match-up and tuning – for up to 75% lower energy consumption and carbon (greenhouse gas) emissions.
- Available with Parallel Sensorless control (patent pending) for best-efficiency staging of both pumps leading to additional energy savings.
Lowest project and operating risk
- Integrated intelligent controls – combined with perfect component match-up and tuning – for fast and easy commissioning.
- Integrated intelligent controls for reduced radio frequency interference/ improved electromagnetic compatibility.
- Single source-responsibility for optimum design and field support.
- DualArm pumps are designed for full redundancy in case of emergency or routine servicing (each pump can be individually isolated from the system with the second pump still operating)
- ETL Listed – conforms to UL STD 778
- Certified to CSA STD C22.2 NO.108
- OSHPD Special Seismic Certification Pre-approval (OSP) No OSP-0422-10
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- Materials (MOC) — Cast iron, ductile iron, or bronze casing, Cast iron or bronze impeller
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- Performance range — Up to 5,000 USgpm (315 L/s) flow; up to 600 ft (180 m) head
- Temperature — 250°F (121°C)
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