Imo Pump - Series 8L

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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.

8L SERIES	Nominal flow rate, GPM/LPM, at 1500 PSI (103 BAR), 200 SSU (43 CST)
8L SERIES	SPEED RPM
Size	1750	1450	1150	960	870
400P	298/1126	238/902	179/677	141/535	124/468
400	381/1441	306/1160	232/878	186/702	163/618
462	599/2268	485/1834	370/1401	298/1126	263/996
630J	-	930/2697	575/2176	575/2176	510/1930
630M	-	1096/4159	683/2584	683/2584	607/2296

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Specifications- Series 8L

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.

* Assumes minimum inlet pressure requirements are met.

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Series 8L in a 630 size driven by a 1000 HP electric motor is believed to be the highest power three screw pump in the world. A pair are installed on heavy crude pipeline service in Alberta, Canada.

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Information on this web site is believed accurate. However, IMO Pump assumes no obligations or responsibilities for its use outside of contractual agreements. Corrections and suggestions are solicited. Webmaster