• Armstrong Series 4300 split-coupled commercial vertical in-line centrifugal fluid pump featuring a heavy cast body and top-mounted industrial electric motor drive.
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Armstrong Series 4300 Vertical In-Line Commercial Pump

Armstrong Series 4300 Vertical In-Line Commercial Pump

Brand: Armstrong SKU: ARM-4300-15
$8,281.00 USD
$8,281.00 USD
Sale Out of Stock - Call to Order
Ships Direct from Distribution — Dispatches in 24–48 Hrs
⚠️ FREIGHT DELIVERY NOTICE: Due to the industrial size and weight of this commercial [boiler/equipment type], it must ship via freight carrier. Free Liftgate Service is included with your order if a commercial loading dock or forklift is not available on-site.
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Series Model Range Series 4300 Split-Coupled VIL
Maximum Volumetric Flow Output Up to 28,000 USgpm (1,800 L/s)
Total Dynamic Head Range Up to 500 ft (150 m)
Operational Temperature Limit Up to 300°F (150°C)
Flange Sizing Thresholds 1.5" to 20” (40 mm to 500 mm)
Motor Capacity Compatibility 1 hp to 1250 hp (0.75 kW to 900 kW) NEMA Premium

The Armstrong Series 4300 Vertical In-Line Commercial Pump is a high-performance system component engineered to deliver premium fluid distribution efficiency and reliability. Built with a heavy-duty pipe-mounted casting, this unit provides exceptional durability and outstanding resistance to demanding system environments. Its low-maintenance, high-performance architecture makes it an ideal solution for large-scale commercial HVAC-system pumping, hydronic cooling loops, and industrial fluid processing lines.

By pioneering a smart vertical inline configuration, the Series 4300 mounts directly into standard industrial pipework to completely eliminate the need for heavy inertia bases, foundation housekeeping pads, flexible connectors, or field grouting routines. The layout features an advanced split-coupling system, enabling mechanical seal replacement directly through the structural gap between the pump and motor shafts without ever disrupting your mechanical lines or motor alignment setup. Driven by high-efficiency premium motors optimized for inverter-fed or variable frequency drive (VFD) applications, this pump dramatically trims hydraulic friction losses while minimizing spatial requirements.

Advanced Engineering Features:

  • Axially Split Spacer Coupling: High-tensile rigid aluminum alloy bracket structure allows swift mechanical seal extractions without removing heavy motor components or disrupting the core line casing.
  • Dynamically Balanced Impeller Core: Eliminates static shaft deflection and limits motor shaft run-out to deliver ultra-quiet, vibration-free fluid velocity distribution.
  • Bearingless Fluid Housing Design: Eliminates traditional internal pump-side bearings to maximize system uptime and eliminate routine grease or lubrication tasks.

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