Armstrong 4280 Series Motor-Mounted End Suction Pumps

Armstrong 4280 Series horizontal end-suction pumps are equipped with close-coupled motors to minimize footprint requirements. They are suited for HVAC-system pumping, light industrial, and process pumping applications.

Armstrong 4280 Series pumps are equipped with high-efficiency NEMA-premium motors to reduce energy consumption and cost. An ANSI-style centerline discharge casing eliminates casing vapor lock and air binding. The sintered silicon carbide mechanical seal seat increases the pump's life. A confined casing gasket eliminates blow-outs. The pre-lubricated and sealed ball bearings make installation convenient and eliminate lubrication requirements. All of the 4280 Series motors are suitable for inverter-fed service.

Armstrong 4280 Series Features

• Cast iron, ductile iron, or bronze casing
• Cast iron or bronze impeller
• Inside single-spring mechanical seal
• Up to 2,000 US GPM (125 L/s) flow; up to 400 ft (120 m)
• 250°F (121°C) maximum temperature
• 0.33 HP to 60 HP (0.25 kW to 45 kW)
• 1" to 6" (25 mm to 150 mm) sizes

Armstrong 4280 Series Documentation

Armstrong 4280 Series Brochure

Armstrong 4280 Series Instructions

Armstrong 4280 Series Service Work Instructions

Armstrong 4280 Series Composite Curves

Armstrong 4280 Series Interchangeability Chart

Armstrong 4030, 4280, 4300, 4360D, 4380, 4600 4382, 4302, 4312 & 4392 Series Sintered Silicon Carbide Mechanical Seal Face Information Sheet

Armstrong Series 4030, 4280, 4360D, 4380, 4382 & 4392 Mechanical Seal Kit Service Work Instructions