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).
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 460 V |
Phase |
N/A 3 |
Frequency |
N/A 60 Hz |
Start |
N/A 55.9 A44.5 kV·A |
Run |
N/A 11.8 A8.1 kW6.4 kV·A |
NEC Code Letter |
N/A G |
Service Factor |
N/A 13.3 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 |