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Imo Products
3-Screw Pumps
3E Series
3G Series
3D Series
6D Series
4SFC Series
4VKC Series
USNP/4PIC Series
12D Series
4U/4T Series
6U/6T Series
8L Series
12L Series
413IC Series
Emtec Series
Tritec Series
C324 Series
T324 Series
323F Series
Gear Pumps
Navy/Marine Pumps
pump image
3-Screw Pumps
3screw pumpThree screw pumps are the largest class of multiple screw pumps in service today.
They are commonly used for
machinery lubrication
hydraulic elevators
fuel oil transport and burner service
powering hydraulic machinery
They are also used in refinery processes for high temperature viscous products such as asphalt, vacuum tower bottoms and residual fuel oils.
Three screw pumps also find extensive use in crude oil pipeline service as well as gathering, boosting and loading of barges and ships. They are common in engine rooms on most of the world's commercial marine vessels and many combat ships.
Flow rates are available from 1 to 3300 GPM (4 to 13,250 L/M) or for operating pressures to 4500 PSIG (310 BAR).
Subject to material selection limitations, three screw pumps are also used for polymer pumping in the manufacture of synthetic fibers such as nylon and lycra.
Designs are now available in sealless configurations such as magnetic drives and canned arrangements. The magnetic drive screw pump is used extensively for pumping isocyanate, a plastic component which is an extremely difficult fluid to seal using conventional technology.
Pumps are also now available in sealless canned configurations.
Three screw pumps are renowned for their low noise levels, high reliability and long life. Three screw pumps are capable of water injection services (Tritec) as well as high pressure coolant service for machine tools (Emtec).
single suction pumpSingle Suction
Flow Range Maximum Pressure
Pump Series GPM L/M PSI
BAR
3E **
1-100
4-375
150
10
3G
1-55
4-208
250
17
3D *
5-400
20-1500
500
35
6D *
5-400
20-1500
1500
100
4SFC
2-15
9-55
1450
100
4VKC
22-248
82-937
1160
80
USNP/4PIC
8-250
30-950
1000
69
12D *
5-250
20-950
2200
150
4T
15-175
55-660
2000
140
6T/6U
15-175
55-660
3000
200
8L
250-900
950-3400
1500-2000
103-140
12L
15-100
55-375
5000
310
413IC
950-2100
3595-7950
150
10
EMTEC 5-240 19-910 1300 90
TRITEC 10-220 40-830 1160 80
double suction pumpDouble Suction
Pump Series GPM L/M PSI BAR
C324 * 50-900
200-3400
500
35
T324 300-800
1125-3000
700
50
323F 400-3500
1500-13,250
300
20
*Available in sealless magnetic drive configurations
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Vertical magnetic drive 3D series Imo three screw pump.
** Available in sealless canned motor/pump configuration
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Canned Imo pump series 210H with 6 HP, 3600 RPM motor.
Pump series 3E also available in canned motor/pump configurations.
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Imo Products
3-Screw Pumps
Gear Pumps
Navy/Marine Pumps
Gear Pumps
CIG (Crescent Internal Gear) pumps are produced primarily for fluid power applications and aircraft fuel test stands.
They are available in multiple stages for very high pressure or moderate pressure on very low viscosity fuels. Pumps are also available in double pump configurations which share a common inlet port but deliver two independent flows for supporting multiple machine functions.
The patented tooth profile of CIG pumps avoids trapping fluid. The result is a very low pulsation, extremely quiet high efficiency pump.
Single pumps are available in 54 different models and double pumps in over 1300 different combinations.
Single pump flow rates from 1 to 125 GPM ( 4 to 475 L/M) with continuous pressure ratings to 5000 PSIG (345 BAR).
Pumps are available in single and double configurations. The double pumps have a common inlet port and two independent discharge ports. Pumps can be provided in a number of staging arrangements allowing very high pressure capability or high pressure at low viscosity.
CIG
Model
Flow Range (1)
Pressure Range (2)
GPM
L/Min
PSI
BAR
2*005
1.1
4.2
4000
275
2*006
1.6
6.1
4000
275
2*008
2.3
8.7
4000
275
3*010
2.9
11.0
4000
275
3*012
3.7
14.0
4000
275
3*016
5.3
20.1
4000
275
4*020
7.2
27.3
4000
275
4*025
9.3
35.2
4000
275
4*032
12.2
46.2
4000
275
5*040
15.3
57.9
4000
275
5*050
20.1
76.1
4000
275
5*063
26.1
98.8
4000
275
6*080
32.1
121.5
4000
275
6*100
41.9
158.6
4000
275
6*125
52.1
197.2
4000
275
8*160
67.4
255.1
4000
275
8*200
83.5
316.0
4000
275
8*250
105.1
397.8
4000
275
* Number of stages / Available 1 through 5 Stages
(1) At 1750 rpm / Capable of operating at higher and lower speeds - Contact Imo Pump
(2) Capable of operating at higher pressures - contact Imo Pump
Imo Products
3-Screw Pumps
Gear Pumps
Navy/Marine Pumps
Navy/Marine Pumps
Imo supplies 3-screw pumps for engine room services such as fuel oil transfer, boost, stripping and burner. Fuels handled, range from heavy bunker fuels to light jet fuels. Imo pumps are also manufactured for lubrication service for diesel engines, gas and steam turbines, reduction gearing, generator sets, blowers and other similar equipment. Pumps can be supplied to commercial marine standards or to full military specifications including US Navy shock, vibration and noise requirements.
Imo Pump's Warren facility manufactures both commercial marine and full combat ship capable centrifugal pumps for services that include all seawater applications as well as fresh, chilled, condensate, feed and potable water for Navy and Commercial Marine vessels. Warren also supplies centrifugal pumps for cargo oil as well as ballast applications. Composite centrifugal pump parts manufactured from Simsite are also supplied to the US Navy.
Combat Ship Services
Low noise, high reliability 3-Screw Imo pumps for:
Machinery Lubrication
Fuel Oil Transfer, Stripping, Boost, Burner
Hydraulic Steering, Controllable Pitch Propeller, Deck Machinery
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Commercial Marine Services
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American Bureau of Shipping Web site: www.eagle.org
The following Imo pumps are covered by ABS certificate numbers indicated:
Monroe, NC, USA Plant
Certificate No: NN1732416
Intended Services: Fuel oil, lube oil, slop oil and hydraulic oil systems
Standards: ABS Rules, USCG 46 CFR 56.60
Model Capacity/Flow Rate (gpm) Max. Working Pressure (psi)
413R 50-1200 450
3E 1-150 500
3D 2-500 990
12D 2-450 2200
3R 100-2500 300
6D 2-425 1500
Standards: 1997 ABS Rules 4/6.12 and 4/4.23.2
422 50-400 25/150
3L 50-400 25/150
Columbia, KY, USA Plant
Certificate No: NN1732419
Intended Services: Oil Systems
Standards: ABS Rules, USCG 46 CFR 56.60
Model Capacity/Flow Rate (gpm) Max. Working Pressure (psi)
3E 1-150 500
3D 2-500 990
(see the 3-Screw pump section for more information on many of these type-approved Imo pumps.)