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  • Category Tags
Design
Brand
Imo
Product Type
Pumps > Three-screw
Related Industries
General Industry
Mechanical
Pressure Differential
Maximum: 17bar-d
Pressure Inlet
Maximum: 3bar-d
Pressure Discharge
Maximum: 250bar-d
Driver
Magnetic
Fluid
Fluid Temperature Range
Maximum: 225°F
Flow
Maximum: 200ft³/h
Viscosity
2mm²/s to 3200mm²/s
Manufacturing
Mounting
Wall and Pedestal
Construction Features
Bearing
Categegory Tags
Design Types
base plate
Installation
horizontal, vertical, dry, in-tank

Product Description

Three-Screw pump Single Suction up to 17 Bar

The 3G series pump is intended for use in lubrication‚ hydraulic and control oil services

Series 3G pumps are provided for differential pressures to 250 PSIG (17.2 Bar) and flow rates to 55 GPM (208 L/M). Mountings include foot or flange. Casing materials are either cast iron or steel. These three screw pumps are used for distillate fuel oil transfer and burner services, machinery lubrication and other industrial pumping applications. Most sizes are available with a tamper resistant built-in pressure relief valve for protection of the pump from momentary pressure overloads.

3G

SERIES

Nominal flow rate, GPM/LPM, at 200 PSI (14 BAR), 100 SSU (20 CST)
SPEED RPM
Size3500290017501450
095-1.2D5/184/14--
095-1.6D6/255/18--
095-2.0D9/337/263/11-
118-1.6D14/5211/405/17-
118-2.0D18/6914/547/265/19
143-1.5D25/9420/7510/377/27
143-1.7D28/10522/8211/408/29
143-2.0D34/12827/10114/5210/39
162-1.6D38/14430/11415/5611/42
162-2.0D50/18840/15121/7816/60

Series 3G Specifications

Casing- Cast iron or cast steel.

Rotors- Power rotor is ductile (nodular) iron. Idler rotors are gray iron. Rotors are nitride hardened for use in the 32-60 SSU (2-10 CST) range for fuel oils or for steel cased pumps.

Shaft Seals- Type L: Steel backed Teflon double lip seal for cast iron pumps only, recommended for clean lubricating oil. Type V: Fluoroelastomer bellows mechanical seal with carbon on niresist faces, fluoroelastomer O-rings, recommended for viscosities below 3000 SSU (650 CST). Type H: Metal bellows balanced, positive drive mechanical seal with carbon on silicon carbide faces, fluoroelastomer O-rings, recommended for viscosities above 3000 SSU (650 CST) or for closer compliance with API.

Bearing- Internal, ball type.

Relief Valve- Optional internal, tamper resistant, built-in pressure relief valve for viscosities not exceeding 3000 SSU (650 CST). Specify differential set pressure in 15 PSI (1.03 BAR) increments, i.e. 45, 60, 75…255. This relief valve is intended for momentary protection for the pump against overpressure. It is not intended to be a pressure control device. Minimum set pressure is 45 PSID (3.1 BAR). Maximum set pressure is 255 PSID (17.6 BAR). Steel cased pumps can include an optional built-on, tamper resistant relief valve with external return to tank connection.

Viscosity- 15,000 SSU (3200 CST) maximum except seal type V.

Inlet Pressure- Type L seal 10 PSIG (0.7 BAR). Types V and H 50 PSIG
(3.4 BAR) maximum

Outlet Pressure- 250 PSIG (17 BAR) maximum [to 300 PSIG (20.7 BAR) with inlet at 50 PSIG (3.4 BAR)]

Temperature- 0 to 225°F (-18 to 107°C)

Drive/Rotation- Direct only. Clockwise rotation facing pump shaft standard. Counterclockwise rotation optional.

Speed- 95 size: 5000 rpm maximum. Sizes 118-162: 4000 rpm maximum.

Mounting- May be foot or flange mounted in any orientation. Vertical tank mounts available.

Connections-

Case Material
InletsIronSteel
Axial, straight threadStandardN/A
Axial, SAE padOptionalStandard
Radial, straight threadOptionalN/A
Radial, SAE padOptionalOptional
Outlets
Radial, straight threadStandardN/A
Radial, SAE padOptionalStandard
Straight thread for use with o-ring fittings. SAE pad is for use with mating SAE 4-bolt 3000 PSI flanges. N/A is not available.

Filtration- Inlet strainers are required to keep contaminants and abrasives out of the pump and 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. Return line filters for closed loop systems also recommended.

Accessories- Completely mounted pump/driver assemblies with baseplates or NEMA ‘C’ face motor adapters are available.

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