Armstrong 4300 Series Vertical In-Line Pumps

Armstrong 4300 pumps are available as part of the Armstrong Design Envelope offering or as standard commercial pumps.

Armstrong 4300 Vertical In-Line Pumps

Armstrong 4300 pumps are available with high-efficiency NEMA-premium motors for significant energy consumption and cost reduction. The vertical in-line design eliminates the need for inertia bases, housekeeping pads, flex connectors, and field alignment or grouting requirements and minimizes space and pipe requirements. The isolated mechanical seal design with optional sediment filters or separators is available to extend seal life in contaminated systems. The split-coupling design allows the replacement of the mechanical seal without disturbing the pump or motor. No lubrication or seal adjustments are required.

Armstrong 4300 Pump Features:

• Cast, ductile iron, or bronze casing
• Cast iron or bronze impeller
• Outside balanced or inside single spring mechanical seal
• Up to 28,000 US GPM (1,800 L/s) flow; up to 500 ft (150 m) head
• Maximum temperature of 300°F (150°C)
• Power range of 1 HP to 1250 HP (0.75 kW to 900 kW)
• 1.5" to 20" (40 mm to 500 mm)

Armstrong 4300 Design Envelope Pumps

Design Envelope 4300 pumps are available in multiple configurations and sizes for HVAC-system pumping and control, general purpose pumping, or industrial/process pumping and control (water or glycol-based) applications.

4300 pumps are pipe-mounted UL 778 pumping units with integrated intelligent controls for space-saving installation and superior energy performance. They save up to 75% of energy costs over comparable traditional constant speed or variable frequency operated pump installations. In addition, remote services through the internet enhance reliability and sustain optimal performance over the life of pumps.

Integrated intelligent controls eliminate separate mounting of variable frequency drive (VFD) as well as procurement, installation (including wiring), calibration, and upkeep of a differential pressure sensor. The vertical motor positioning requires up to 60% less floor space compared to other pump configurations. 4300 Design Envelope pumps are the expertly staggered product line for perfect pump match-up and selection, especially in retrofit situations. Superior energy performance qualifies for significant cost recovery under utility and government rebate programs. Design Envelope selections also frequently recommend a smaller motor and/or pump, reducing installed cost.

The pump's split-coupling design allows easy seal service without removing the pump or motor. As a result, 75% decrease in energy consumption reduces operational greenhouse gas emissions at an equal ratio. Eliminating inertia bases, housekeeping pads, flex connectors, and extra piping avoids all procurement-related environmental impacts (material, energy, carbon). Equipment downsizing mitigates environmental impacts associated with procuring unnecessarily large equipment. Integrated design packs and ships more economically for less packaging waste compared to loose component shipping and assembly.

Integrated intelligent controls provide fast and easy commissioning and reduced radio frequency interference/improved electromagnetic compatibility. Optional performance management provides early warnings, online trending and analysis, and reports and summaries. Optional sediment filters or separators extend seal life in contaminated systems. Armstrong 4300 pumps can be independently operated through embedded sensorless control or in conjunction with a building automation system (BAS).

Armstrong Design Envelope 4300 Pump Features:

• Ductile iron e-coated casing
• Stainless steel impeller
• Sintered silicon carbide mechanical seal
• On-board Intelligent Variable Speed controls with sensorless control
• Split-coupling design and outside balanced or inside single spring mechanical seal
• Controls enclosure UL type 12 or UL type 4X for outdoor applications
• 1-10 HP range standard with DEPM motors that reduce losses by more than 20% over NEMA Premium efficiency
• Network capable of remote performance management services
• 25 to 25,000 US GPM (1.5 to 1500 L/s) flow
• 10 to 300 ft (3 to 90 m) head (composite curves available)
• Maximum temperature of 300°F (150°C)
• Power range of 0.33 HP to 10 HP (0.25 kW to 7.5 kW)
• 1" to 20" (25 mm to 500 mm)

Other Armstrong Vertical In-Line Pumps

Armstrong 4380 pumps are available in either Design Envelope or conventional models, in horsepowers ranging from 1/4 HP to 10 HP (Design Envelope) or 1/3 HP to 60 HP (conventional), and in sizes 1" to 6" (Design Envelope) or 1-1/2" to 8" (conventional).

Armstrong 4360 pumps are available as conventional commercial pumps, in horsepowers ranging from 1/3 HP to 15 HP, and in sizes 1-1/4" to 3".

Armstrong Design Envelope Solutions

Design Envelope technology is a demand-based intelligent control solution that models equipment and system behavior, monitors actual system conditions, and dynamically adjusts equipment operation to match the system demand. Design Envelope technology is at the core of Armstrong’s groundbreaking advances in building performance. Design Envelope technology enables the greenest, most flexible, and most cost-effective fluid-flow and HVAC systems on the planet – resulting in the lowest installed and operating cost with the same equipment.

View the Armstrong Design Envelope playlist on YouTube.

Armstrong Pump Manager

Pump Manager from Armstrong is a performance management service to help operators maintain optimized long-term efficiency.

Armstrong 4300 Pump Curves

A pump performance curve indicates how a pump will perform against specific pressure head and flow rates. A curve is defined for a specific operating speed (RPM) and inlet/outlet diameter.

Armstrong 4300 Pump Submittals

Armstrong Series 4300 Vertical In-Line Pumps Brochure

Armstrong Design Envelope Intelligent Variable Speed Pumps Brochure

Visit Armstrong Fluid Technology's Design Envelope 4300 Pumps page or 4300 Vertical In-Line Pumps page to view the complete list of submittals, manuals, service work instructions, charts, and more.

Armstrong 4300 Pump Motors

All motors are suitable for inverter-fed service. Design Envelope 4300 pumps have a power range of 0.33 HP to 10 HP (0.25 kW to 7.5 kW). Armstrong DEPM motor technology delivers an additional 6-20% efficiency, meeting IE5 efficiency standards.

Armstrong 4300 Pump Seal Kits and Other Parts

Armstrong offers pump seal kits individually or as part of a complete repair kit to support the installation and maintenance of 4300 Vertical In-Line pumps.

Shop Armstrong Pump Parts

Armstrong Design Envelope 4300 Pump Seal Replacement

 Armstrong 4300 Pump Seal Replacement