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Capacity : 450 gpm (28.4 L/s)
Head : 30 ft (39.5 m)

Standard (4RH) and Explosion-Proof (4RHX) Construction
The 4RH and 4RHX (Explosion-proof) Submersible Wastewater Pumps are the right choice when difficult to pump fibrous or stringy solids are to be expected. The 4RH/4RHX series provides smooth, vibration-free operation when operating at heads higher than peak efficiency. For use in municipal lift stations, treatment plants and industrial waste applications. Myers offers a complete line of wastewater pumps, lift-out rail assemblies, controls and accessories to meet your needs.

Advantages By Design
Passes stringy trash, fibrous wastes, slurries and other difficult to pump solids that standard enclosed or semi-open impellers cannot.

  • Recessed impeller design has completely open passage in volute.
  • Pumping action is by vortex; solids can't get caught in impeller volute.
  • Operates without vibration or cavitation over entire performance curve. Operates near shut-off without harming pump.

Durable motor will deliver many years of reliable service

  • Recessed impeller greatly increases bearing life by reducing radial load.
  • Oil-filled motor for maximum heat dissipation and constant bearing lubrication.
  • Heat sensor thermostats imbedded in windings protect motor from overheat conditions.
  • Seal leak probes warn of moisture entry; helps prevent costly motor burn-out.

Available with optional FM approval for use in Class 1, Groups C and D hazardous locations (4RHX only).

Unit of Measure

Specifications

Head

 N/A 130 ft39.5 m

Solids Handling

 N/A 3 in76 mm

Liquids Handling

 N/A Effluent Fiberous Wastewater Raw Unscreened Sewage Storm Water

Intermittent Liquid Temperature

 N/A up to 140 ºFup to 60 ºC

Winding Insulation Temperature. (Class H)

 N/A 356 ºF180 ºC

Motor Electrical Data

 N/A 3450 RPM
7 1/2-15 HP, 200/230/460/575V
3Ø, 60 Hz
20 HP, 230/460/575V
3Ø, 60 Hz

Acceptable pH Range

 N/A 6 to 9

Specific Gravity

 N/A 0.9 to 1.1

Viscosity

 N/A 28 to 35 SSU

Horizontal Discharge Flanged Centerline

 N/A 4 in 125 lb. ANSI 101.6 mm

Speed

 N/A 3450 rpm

Power

 N/A 7.5 hp

Voltage

 N/A 575 V

Phase

 N/A 3

Frequency

 N/A 60 Hz

Start

 N/A 44.7 A44.5 kV·A

Run

 N/A 9.4 A8.1 kW6.3 kV·A

NEC Code Letter

 N/A G

Service Factor

 N/A 10.6 A9.5 kW1.2

Capacity

 N/A 450 gpm28.4 L/s

Note

 N/A Consult factory for applications outside of these recommendations.

Construction Material

Motor Housing Material

 N/A Cast Iron, Class 30, ASTM A48

Seal Housing Material

 N/A Cast Iron, Class 30, ASTM A48

Volute Case Material

 N/A Cast Iron, Class 30, ASTM A48

Cord Cap Material

 N/A Cast Iron, Class 30, ASTM A48

Recessed Impeller Material

 N/A Ductile Iron, Class 65, ASTM A536

Power Cord Material

 N/A 25 ft. SOOW

Control Cord Material

 N/A 25 ft. SOOW

Standard Double Tandem Mechanical Seal Material

 N/A Carbon & Ceramic, Type 21

Optional Double Tandem Mechanical Seal Material

 N/A Lower Tungsten, Carbide

Pump Shaft Material

 N/A 416 SST

Motor Shaft Material

 N/A 416 SST

Fasteners Material

 N/A 300 series SST

Agency Approvals

Agency Approvals

 N/A