The 4123A Series™ internal gear pump is the ideal solution for refinery and petrochemical applications. It can withstand extremely high temperatures and comes with the widest range of sealing options. It can handle flows up to 1,600 GMP (363 m³/h).
Features & Benefits
- For refinery and petrochemical applications
- Recommended for extremely high temperatures
- Widest range of sealing options available
Capacity
to 500 GPM
to 114 m³/h
Viscosity
28 to 2,000,000 SSU
1 to 440,000 cSt
Pressure
to 200 PSI
to 14 Bar
Temperature
-20 to +800 °F
-25 to +425 °C
Opcions
Porting
Drives
Mounting
Sealing
Specifications
Model | Standard Port Size | Nominal Pump Rating (GPM) | Nominal Pump Rating (m3/h) | Maximum RPM | Maximum Pressure PSI | Maximum Pressure BAR |
---|---|---|---|---|---|---|
H4123A | 1.5 | 15 | 2.8 | 1750 | 200 | 14 |
HL4123A | 1.5 | 30 | 5.6 | 1750 | 200 | 14 |
K4123A | 2 | 80 | 18 | 780 | 200 | 14 |
KK4123A | 2 | 100 | 23 | 780 | 200 | 14 |
LQ4123A | 2.5 | 135 | 31 | 640 | 200 | 14 |
LL4123A | 3 | 140 | 32 | 520 | 200 | 14 |
LS4123A | 3 | 200 | 45 | 640 | 200 | 14 |
Q4123A | 4 | 300 | 68 | 520 | 200 | 14 |
QS4123A | 6 | 500 | 114 | 520 | 200 | 14 |
Photos
Videos

Crude Oils
This is a very generic term for unrefined oils typically being recovered from the ground. Some crude oil may contain particulates from the oil well or recovery method. They are considered to be flammable liquids. Crude oils are later refined and used for everything from making plastics to gasoline.

Lube Oil (Machinery Lubrication)
Machinery lubrication pumps are used in everything from small backup generators to naval ships. Lube oils, as the name implies, are the liquids used to lubricate rotating and reciprocating machinery. Lube oils may be handled at higher pressures to ensure their penetration of the equipment.

Asphalt Cement
Clean asphalt contains no fillers and is an oil based liquid. It is primarily used in paving roads, waterproofing liquids, and paints. Typically they are handled at elevated temperatures to reduce the viscosity of the asphalt. The pump needs a source of heat like jacketing or electric heat to prevent the product from solidifying in the pump.

Heat Transfer Liquids (Hot Oil)
Heat transfer liquids, heat transfer oil (HTO) or hot oil, are generally made from one of the following: mineral oil, diphenyls, modified terphenyls or polyalkalene glycols. Heat transfer liquids are used for transferring heat from a source to a point of use such as dies, presses, cooking vessels, processing equipment, etc. Most are handled at temperatures up to 600°F.
Product Flyers
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DRAWINGS
H4123A with Relief Valve - 1.5" Class 150 ANSI RH/LH PDF
STEP
HL4123A with Relief Valve - 1.5" Class 150 ANSI RH/LH PDF
STEP
H4123A with Plain Head - 1.5" Class 150 ANSI RH/LH PDF
HL4123A with Plain Head - 1.5" Class 150 ANSI RH/LH PDF
K4123A with Relief Valve - 2" Class 150 RH/LH PDF
STEP
KK4123A with Relief Valve - 2" Class 150 RH/LH PDF
STEP
K4123A with Plain Head - 2" Class 150 RH/LH PDF
KK4123A with Plain Head - 2" Class 150 RH/LH PDF
LQ4123A with Relief Valve - 2.5" Class 150 ANSI RH/LH PDF
STEP
LS4123A with Relief Valve - 3" Class 150 ANSI RH PDF
STEP
LL4123A with Plain Head - 3" Class 150 ANSI RH/LH PDF
STEP
LL4123A with Relief Valve - 3" Class 150 ANSI RH PDF
STEP
LS4123A with Plain Head - 3" Class 150 ANSI RH/LH PDF
STEP
LQ4123A with Plain Head - 2.5" Class 150 ANSI RH/LH PDF
STEP
QS4123A with Relief Valve - 6" Class 150 ANSI Opposite PDF
STEP
Q4123A with Relief Valve - 4" Class 150 ANSI RH/LH with Studs and Bolts PDF
STEP
QS4123A with Relief Valve - 6" Class 150 ANSI RH PDF
STEP
QS4123A with Plain Head - 6" Class 150 ANSI Opposite PDF
STEP
QS4123A with Plain Head - 4" Class 150 ANSI RH/LH PDF
STEP