Imo Pump
Imo - Model 8L Series -Three Screw Pump
FromImo Pump
The 8L series pump is designed for pipeline transport in medium to high pressure service for crude oils, fuel oils and other petroleum products. It also finds extensive use in steam/electric power plants as the burner pumps supplying fuel to the boilers.
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pump selection
- Casing- High shock capacity ductile (nodular) iron standard in sizes 400 and 462, cast steel optional. Size 630 uses a fabricated steel case.
- Rotor Housing- Bronze standard on sizes 400 and 462, bimetal optional. Bimetal standard on size 630.
- Power Rotor- Alloy steel, nitride hardened and thread ground.
- Idler Rotors- Alloy steel, nitride hardened and thread ground.
- Gaskets- Buna N and fluoroelastomer.
- Seal & Bearing- Type B: Buna N bellows mechanical seal with carbon on niresist faces, Buna N o-rings and external, permanently grease packed deep groove ball bearing. Recommended for distillate oils. Type H: Positive drive mechanical seal with carbon on tungsten carbide faces (standard on sizes 462 and 630, optional on size 400), fluoroelastomer o-rings and external, high temperature, permanently grease packed deep groove ball bearing (size 630 has regreaseable duplex bearings). Recommended for residual and crude oils.
- Accessories- Completely mounted, built to order pump/driver assemblies are available with baseplates, ANSI RF spool pieces, etc.
- Outlet Pressure- 1000 PSIG (70 BAR) maximum, bronze construction. 1500 PSIG (103 BAR) maximum, bimetal construction. Minimum recommended differential pressure is 40 PSI (2.8 BAR). Consult Imo Pump for higher pressures.
- Inlet Pressure- 75 PSIG (5.2 BAR) maximum, sizes 400 & 462. Modification to 600 PSIG (41.4 BAR) available. 150 PSIG (10.3 BAR) maximum, size 630.
- Viscosity- 33 SSU (2.0 CST) minimum. Type B: 3000 SSU (650 CST) maximum. Consider cold startup conditions. Type H: Viscosities above 3000 SSU (650 CST).
- Temperature- Type B: 0 to 180°F (-18 to 82°C). Type H: 0 to 250°F (-18 to 121°C)
- Drive- Direct only.
- Rotation- Clockwise facing pump shaft .
- Mounting- May be foot mounted in any orientation.
- Filtration- Inlet strainers are required to keep contaminants and abrasives out of the pump. They must be selected in consultation with the strainer vendor to prevent pump starvation. Normally, 60 mesh (0.01 inch- 238 micron) for light and 1/8-3/16 inch (3-5mm) openings for heavy oils are recommended.
- Maximum Speed*- 2300 RPM maximum for sizes 400 and 462. 1500 RPM maximum for size 630. Speeds above 1800 RPM require Imo Pump review.