Armstrong 4700 Vertical Multistage Pumps

4700 Vertical Multistage Pumps

• Applications: Domestic water pressure boosting; fire safety ‘jockey’ systems / system pressure upkeep; boiler feed water pumping
• Description: The Armstrong 4700 MultiStage Pumps are designed for reliability and low maintenance cost
• Materials: Cast iron or stainless steel casing
• Configuration: Inside single-spring mechanical seal.
• Performance range: Up to 400 USgpm (25 L/s) flow; up to 900 ft (275 m) head
• Temperature: 250°F (121°C)
• Power Range: 0.5 hp to 50 hp (0.37 kW to 37 kW)
• Size: 1.25" to 4" (38 mm to 100 mm)

Features and Benefits

Low operating cost

•  Armstrong 4700 pumps are equipped with high-efficiency NEMA-premium motors for significant reduction in energy consumption and cost 
•  All motors are suitable for inverter-fed service

Minimal mechanical wear and low maintenance costs

•  Anti-erosion measures in high-velocity areas of intermediate pump casing 
•  Square-edge 6 and 12 spline shaft design for reduced impeller wear 
•  Casing venting to prevent air entrapment and dry running 
•  Tungsten carbide pump bearing and silicon carbide mechanical seal seat for extended durability 
•  Flexible floating outer casing to compensate for differing temperature applications