Imo Pump - Series 12L

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Series 12L pumps are designed for very high pressure service primarily for compressor gas sealing, fluid power and hydrostatic bearing applications. Pumps are equipped with a steel case and balanced mechanical shaft seal. This series is believed to be the world's highest pressure capability 3-screw pump.

12L SERIES	Nominal flow rate, GPM/LPM, at 4500 PSI (276 BAR), 200 SSU (43 CST)
12L SERIES	SPEED RPM
Size	3500	2900	1750
118	14/53	-	-
137	25/94	18/68	-
156	39/146	29/110	-
187P	54/205	41/156	-
187	70/267	55/207	-
200	87/330	68/258	27/102

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Specifications- Series 12L

Casing- Low alloy cast steel.

Rotor Housing- Pearlitic gray iron.

Power Rotor- Alloy steel, nitride hardened and thread ground.

Idler Rotors- Ductile iron, hardened and thread ground.

Gaskets- Fluoroelastomer o-rings with backup rings.

Seal & Bearing- Balanced mechanical seal with stainless steel bellows, fluoroelastomer o-rings and carbon on carbide sealing faces. External, permanently grease packed, deep groove ball bearing.

Accessories- Completely mounted, built to order pump/driver assemblies are available with baseplates, ANSI RF spool pieces, etc.

Outlet Pressure- 4000 PSIG (276 BAR) maximum for size 118. 4500 PSIG (310 BAR) maximum for sizes 137 through 200. Minimum recommended differential pressure is 40 PSI (2.8 BAR). Consult Imo Pump for higher pressures.

Inlet Pressure- 200 PSIG (13.8 BAR) maximum. 250 PSIG (17.2 BAR) maximum for type N.

Viscosity- 45 to 3000 SSU (5 to 650 CST)

Temperature- 0 to 250°F (-18 to 121°C)

Drive- Direct only.

Rotation- Clockwise facing pump shaft .

Mounting- May be foot mounted in any orientation.

Connections- Pumps have SAE 4-bolt socket weld flanges that are provided with the pump.

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, 25 micron or finer inlet filtration is recommended.

Maximum Speed*- 3600 RPM

* Assumes minimum inlet pressure requirements are met.

Series 12L pump shown with optional discharge spool piece and inlet port rotated 90 degrees from the standard up position.

Service Manual

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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