Series 4700

Summary

Product identification

Armstrong Series 4700 Vertical Multistage Pumps (VMS) are designed for high-efficiency and reliable performance in industrial and building services applications.

Operating limits

• Hydraulic Coverage: Up to 390 US gpm and 930 feet tdh
• Pressure Capabilities: Beyond 300 psi
• Maximum Working Pressure:
  • 230 / 375 PSI (16/26 Bar) max. (depending on model)
  • Up to 440 PSI (up to 30 Bar) max. (depending on model)
• Liquid Temperature:
  • VMS: -22°F to 248°F (-30°C to 120°C)
  • VMS B: 5°F to 248°F (-15°C to 120°C)

Feed water

• Type of Liquid: Clean water (for other clean liquids, consult factory)
• Certifications: All impellers and components are NSF 61 certified for clean water applications.

Performance Range

The Series 4700 pumps are available in VMS and VMS B versions, with various nominal sizes.

VMS:

• Nominal Sizes: 1, 3, 5, 10, 15, 20, 32, 45, 64
• Capacity: 3 to 132 US gpm (0.19 to 8.33 l/s)
• Total Head: 24 to 860 ft (7 to 262 m)

VMS B:

• Nominal Sizes: 1, 3, 5, 10, 15, 20, 32, 45, 64
• Capacity: 66 to 390 US gpm (4.16 to 24.61 l/s)
• Total Head: 44 to 930 ft (13 to 284 m)

Electrical

• Motor Power:
  • VMS: 1/2 to 25 HP (0.37 to 18.5 kW)
  • VMS B: 5 to 50 HP (4 to 37 kW)
• Motor Type:
  • VMS: NEMA C/TC/TSC frame
  • VMS B: NEMA TC/TSC frame
• Speed: 50–60 Hz, 3000-3600 RPM
• Direction of Rotation: Clockwise when viewed from motor end
• Features: Inverter-ready motor, compatible with standard NEMA motor sizes.

Mechanical / hydraulic

• Pump Type: Vertical Multistage
• Design: Vertical design minimizes footprint, integrated base simplifies installation.
• Maintenance:
  • Cartridge type mechanical seals allow replacement without disassembling the motor bracket.
  • Spacer coupling allows maintenance without removing heavy motors over 7 ½ hp.
  • Smart plug solutions: Air ventilation plug, Water filling & sensor plug, Drain plug.
• Shaft Seal Materials:
  • Resin impregnated carbon graphite
  • Sintered silicon carbide
  • Silicon carbide with carbon graphite
  • Conforms with EN12756
• Connections:
  • Suction: 1 ¼” (32 mm), 2” (50 mm), 2 ½” (65 mm), 3” (80 mm), 4” (100 mm)
  • Discharge: 1 ¼” (32 mm), 2” (50 mm), 2 ½” (65 mm), 3” (80 mm), 4” (100 mm)

Key Component Materials

• Impeller: SS 304
• Intermediate Casing: SS 304
• Liner Ring: SS 304, SS 316
• Bottom Casing: SS 304, Cast iron
• Casing Cover: SS 304, Cast iron
• Shaft: SS 304 (depending on model), SS 316, SS 329A (depending on model)
• Shaft Sleeve Bearing: Tungsten carbide
• Shaft Seal: Silicon Carbide/Carbon/FPM
• O-ring: FPM
• Outer Casing: SS 304
• Motor Bracket: Cast iron
• Base: Die cast aluminium, Cast iron

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Disclaimer: This summary is based on extracted text and may not include all figures, footnotes, or the latest revisions from the official OEM PDF datasheet. Contractual data must always match the specific OEM PDF revision used on the project.

Official datasheet (PDF)

Lenntech datasheet mirror