How to Prime Your Pump
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How to Determine Feet of Head
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About Process Pumps
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Constant-Flow-Rate Pumps for Oil
A high-horsepower motor moves oil with a viscosity similar to SAE 60 motor oil. Also known as gear pumps, these produce a smooth flow of liquid to lubricate equipment and blend oils. Motor is open dripproof (ODP) for use in clean, dry, and well-ventilated environments. Pumps are gravity fed and require an elevated liquid source to fully fill the pump before turning on. Do not run dry or use with solids.
Note: If flow control is needed, place valves or reducers on the discharge side; never restrict the inlet of a pump with a valve or reducer.
Intake | Discharge | Overall | |||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Max. Flow Rate, gpm | Max. Viscosity, cP | Temp. Range, °F | hp | Current, A | Pipe Size  | Thread Type | Gender | Pipe Size | Thread Type | Gender | Lg. | Wd. | Ht. | Each | |
240/460V AC, Three Phase—Without Thermal Overload Protection | |||||||||||||||
Hardwire | |||||||||||||||
| 5 | 880 | -20° to 240° | 1/2 | 2/1 | 1/2 | NPT | Female | 1/2 | NPT | Female | 21 5/8" | 6 7/8" | 8 1/2" | 00000000 | 000000000 |
208-240/460V AC, Three Phase—Without Thermal Overload Protection | |||||||||||||||
Hardwire | |||||||||||||||
| 10 | 880 | -20° to 240° | 2 | 6.2/3.1 | 3/4 | NPT | Female | 3/4 | NPT | Female | 24" | 6 7/8" | 8 1/2" | 00000000 | 00000000 |
| 20 | 880 | -20° to 240° | 2 | 6.2/3.1 | 1 | NPT | Female | 1 | NPT | Female | 24 1/2" | 6 7/8" | 8 1/2" | 00000000 | 00000000 |
| 30 | 880 | -20° to 240° | 3 | 8.2/4.1 | 1 | NPT | Female | 1 | NPT | Female | 25" | 6 7/8" | 8 1/2" | 00000000 | 00000000 |
| 40 | 880 | -20° to 240° | 5 | 13.8/6.9 | 1 1/2 | NPT | Female | 1 1/2 | NPT | Female | 28 1/8" | 11 7/8" | 8 1/2" | 00000000 | 00000000 |
Harsh-Environment Compact Constant-Flow-Rate Pumps for Water and Oil
An aluminum enclosure around the motor provides protection in dusty and dirty environments. Designed to fit into small equipment, these pumps have miniature gears and a subfractional horsepower motor for low-flow applications. Pumps are gravity fed and require an elevated liquid source to fully fill the pump before turning on. Do not run dry or use with solids.
Note: If flow control is needed, place valves or reducers on the discharge side; never restrict the inlet of a pump with a valve or reducer.
For technical drawings and 3-D models, click on a part number.
Intake | Discharge | Overall | ||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Max. Flow Rate | Max. Pressure, psi | Max. Viscosity, cP | Temp. Range, °F | hp | Current, A | Tube Connection Type | Gender | For Tube ID | Tube Connection Type | Gender | For Tube ID | Lg. | Wd. | Ht. | Each | |
12V DC—Without Thermal Overload Protection | ||||||||||||||||
Hardwire | ||||||||||||||||
| 0.61 gpm (78 oz./min.) | 20 | 800 | 10° to 180° | Subfractional | 2.2 | Barbed | Male | 3/16" | Barbed | Male | 3/16" | 4" | 1 3/4" | 2 1/2" | 0000000 | 000000 |
24V DC—Without Thermal Overload Protection | ||||||||||||||||
Hardwire | ||||||||||||||||
| 0.61 gpm (78 oz./min.) | 20 | 800 | 10° to 180° | Subfractional | 1.4 | Barbed | Male | 3/16" | Barbed | Male | 3/16" | 4" | 1 3/4" | 2 1/2" | 0000000 | 000000 |
Compact Constant-Flow-Rate Pumps for Water and Oil
Designed to fit into small equipment, these pumps have miniature gears and a subfractional horsepower motor for low-flow applications. Pumps are gravity fed and require an elevated liquid source to fully fill the pump before turning on. Do not run dry or use with solids.
Note: If flow control is needed, place valves or reducers on the discharge side; never restrict the inlet of a pump with a valve or reducer.
For technical drawings and 3-D models, click on a part number.
Intake | Discharge | Overall | ||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Max. Flow Rate | Max. Pressure, psi | Max. Viscosity, cP | Temp. Range, °F | hp | Current, A | Tube Connection Type | Gender | For Tube ID | Tube Connection Type | Gender | For Tube ID | Lg. | Wd. | Ht. | Each | |
120V AC, Single Phase—With Thermal Overload Protection | ||||||||||||||||
Hardwire | ||||||||||||||||
| 0.43 gpm (55 oz./min.) | 20 | 800 | 10° to 180° | Subfractional | 1.5 | Barbed | Male | 3/16" | Barbed | Male | 3/16" | 4 3/8" | 3" | 3 3/4" | 0000000 | 0000000 |
240V AC, Single Phase—With Thermal Overload Protection | ||||||||||||||||
Hardwire | ||||||||||||||||
| 0.43 gpm (55 oz./min.) | 20 | 800 | 10° to 180° | Subfractional | 1.5 | Barbed | Male | 3/16" | Barbed | Male | 3/16" | 4 3/8" | 3" | 3 3/4" | 0000000 | 000000 |
Constant-Flow-Rate Pumps without Motor for Chemicals
With a 316 stainless steel housing and stainless steel gears, these pumps are often used to dispense chemicals such as ethylene glycol, isopropyl alcohol, and nitric acid. Use an electric motor with a coupling and belt/pulley drive. Also known as gear pumps, they produce a smooth flow of liquid. All are self-priming, which means they create a suction force to draw liquid upward and fill the pump chamber. Do not use with solids.
For technical drawings and 3-D models, click on a part number.
Required hp | Intake (NPT) | Discharge (NPT) | Overall | Shaft | ||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Max. Flow Rate @ 25 psi, gpm | Max. Flow Rate, gpm | Max. ft. of Head | Max. Pressure, psi | Max. Viscosity, cP | @ 25 psi | @ 100 psi | Pipe Size | Gender | Pipe Size | Gender | Lg. | Wd. | Ht. | Dia. | Lg. | Center-to-Base Lg. | Each | |
| 4.5 | 4.5 | 462 | 200 | 20,000 | 1/4 | 1/2 | 3/8 | Female | 3/8 | Female | 6 1/4" | 3" | 3 11/16" | 9/16" | 1 11/16" | 2 3/8" | 00000000 | 000000000 |
| 8.9 | 9 | 462 | 200 | 20,000 | 3/4 | 1 | 1/2 | Female | 1/2 | Female | 7 1/4" | 3 1/2" | 4 1/2" | 11/16" | 1 9/16" | 3" | 00000000 | 00000000 |
Constant-Flow-Rate Pumps without Motor for Oil
A cast iron housing and steel gears allow these pumps to be used to dispense oil and fuel such as hydraulic oil and diesel fuel. Select your own motor to tailor them to your application. Use an air or electric motor with a coupling and belt/pulley drive. Also known as gear pumps, they produce a smooth flow of liquid for applications such as engine lubrication. All are self-priming, which means they create a suction force to draw liquid upward and fill the pump chamber. Do not use with solids.
Note: Pumps must be filled with liquid before use. They need a constant flow of liquid and cannot run dry.
For technical drawings and 3-D models, click on a part number.
Required hp | Intake | Discharge | Overall | Shaft | |||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Max. Flow Rate @ 25 psi, gpm | Max. Flow Rate, gpm | Max. ft. of Head | Max. Viscosity, cP | @ 25 psi | @ 100 psi | Pipe Size | Thread Type | Gender | Pipe Size | Thread Type | Gender | Lg. | Wd. | Ht. | Dia. | Lg. | Center-to-Base Lg. | Each | |
| 8.9 | 9 | 462 | 20,000 | 3/4 | 1 | 1/2 | NPT | Female | 1/2 | NPT | Female | 7 1/4" | 3 7/16" | 4 1/2" | 11/16" | 1 9/16" | 3" | 00000000 | 000000000 |
| 23 | 23.2 | 462 | 600 | 1.2 | 2.1 | 1 | NPT | Female | 3/4 | NPT | Female | 9 1/8" | 4 1/2" | 6" | 3/4" | 1 1/2" | 3 7/8" | 00000000 | 00000000 |
Self-Priming Circulation Pumps without Motor for Oil
Use these pumps to move lubricating oil such as hydraulic and motor oil. Also known as flexible impeller pumps, they create a suction force that can draw liquid upward to fill the pump chamber when your liquid source is below the pump. The impeller resists clogging and wear. Select a spark-free air motor for hazardous environments or attach an electric motor with a speed reducer or a belt pulley to alter the pump speed.
Repair kits (sold separately) include components such as impellers, O-rings, and seal lips.
Note: Pumps must be filled with liquid before use. They need a constant flow of liquid and cannot run dry.
For technical drawings and 3-D models, click on a part number.
Intake (NPT) | Discharge (NPT) | Shaft | Overall | ||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Max. Flow Rate, gpm | Max. Ft. of Head, ft. | Max. Pressure, psi | Max. Viscosity | Temp. Range, °F | Required hp | Gender | Pipe Size | Gender | Pipe Size | Dia. | Lg. | Ctr.-to-Base Lg. | Ht. | Lg. | Wd. | Each | |
For 500 rpm-2,100 rpm Motor Speed | |||||||||||||||||
| 11.5 | 50 | 21 | Not Rated | 50° to 180° | 1/3 hp | Female | 1/2 | Female | 1/2 | 5/8" | 1 1/8" | 1 15/16" | 3 13/16" | 4 1/2" | 4 1/8" | 0000000 | 0000000 |
| 25 | 50 | 26 | Not Rated | 50° to 180° | 3/4 hp | Female | 1 | Female | 1 | 5/8" | 2 1/4" | 1 7/8" | 3 9/16" | 6 3/8" | 4 3/4" | 0000000 | 000000 |
Air-Powered Constant-Flow-Rate Pumps
Commonly called piston pumps, these are often used in high-pressure applications, such as hydrostatic testing of pipelines, tanks, and valves. Flow and outlet liquid pressure can be controlled by varying the air pressure. To calculate discharge liquid pressure, multiply the air pressure by the ratio shown in the table. Pumps are self-priming, which means they create a suction force to draw liquid upward to fill the pump chamber.
Note: Pumps must be filled with liquid before use. They need a constant flow of liquid and cannot run dry.
For technical drawings and 3-D models, click on a part number.
Flow Rate, gpm | Air Pressure, psi | Overall | |||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| @ 0 psi | @ 3,000 psi | Max. ft. of Head | Max. Discharge Pressure, psi | Max. Viscosity, cP | Min. | Max. | Air Consumption, scfm | Air Connection (NPT) | Intake Pipe Connection (NPT) | Discharge Pipe Connection (NPT) | Lg. | Wd. | Ht. | Each | |
86:1 Discharge Liquid to Inlet Air Pressure Ratio | |||||||||||||||
| 0.19 | 0.17 | 28,764 | 12,470 | 100 | 15 | 145 | 20 | 1/4 Female | 3/8 Female | 1/4 Female | 4 5/8" | 4" | 9" | 0000000 | 000000000 |
28:1 Discharge Liquid to Inlet Air Pressure Ratio | |||||||||||||||
| 0.58 | 0.13 | 9,365 | 4,060 | 100 | 15 | 145 | 20 | 1/4 Female | 3/8 Female | 1/4 Female | 4 5/8" | 4" | 9" | 0000000 | 00000000 |
Hydraulic Pumps
Also known as gear pumps, these have few moving parts so they're less prone to wear than other hydraulic pumps. Combine with an electric motor to generate flow in a hydraulic system. To mount to a NEMA C-face motor, use a Pump-to-Motor Mount (sold separately).
UN/UNF (SAE Straight) thread connections have straight threads and are also known as O-ring Boss fittings.
For technical drawings and 3-D models, click on a part number.
Inlet Connection— UN/UNF (SAE Straight) | Outlet Connection— UN/UNF (SAE Straight) | Overall | Shaft | |||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Fixed Displacement Rate, cu. in./rev. | Max. Flow Rate, gpm | Max. Pressure, psi | Max. Speed, rpm | Thread Size | Dash Size | Thread Size | Dash Size | Ht. | Lg. | Dia. | Lg. | Choose a Drive Direction | Each | |
| 0.11 | 1.7 | 2,500 | 4,000 | 7/8"-14 | 10 | 3/4"-16 | 08 | 3 5/8" | 4" | 1/2" | 1 1/4" | 0000000 | 0000000 | |
| 0.21 | 3.3 | 2,500 | 4,000 | 7/8"-14 | 10 | 3/4"-16 | 08 | 3 5/8" | 4 1/4" | 1/2" | 1 1/4" | 0000000 | 000000 | |
| 0.33 | 5.2 | 2,500 | 4,000 | 7/8"-14 | 10 | 3/4"-16 | 08 | 3 5/8" | 4 3/8" | 1/2" | 1 1/4" | 0000000 | 000000 | |
| 0.52 | 8.4 | 2,500 | 4,000 | 7/8"-14 | 10 | 3/4"-16 | 08 | 3 5/8" | 4 3/4" | 1/2" | 1 1/4" | 0000000 | 000000 | |
| 0.64 | 7.8 | 2,000 | 3,000 | 7/8"-14 | 10 | 3/4"-16 | 08 | 3 5/8" | 4 7/8" | 1/2" | 1 1/4" | 0000000 | 000000 | |
Inlet Connection— UN/UNF (SAE Straight) | Outlet Connection— UN/UNF (SAE Straight) | Overall | Shaft | |||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Fixed Displacement Rate, cu. in./rev. | Max. Flow Rate, gpm | Max. Pressure, psi | Max. Speed, rpm | Thread Size | Dash Size | Thread Size | Dash Size | Ht. | Lg. | Dia. | Lg. | Choose a Drive Direction | Each | |
| 0.37 | 5.9 | 4,000 | 4,000 | 7/8"-14 | 10 | 3/4"-16 | 08 | 4 5/8" | 4 7/8" | 3/4" | 1" | 0000000 | 0000000 | |
| 0.49 | 7.9 | 4,000 | 4,000 | 1 1/16"-12 | 12 | 7/8"-14 | 10 | 4 5/8" | 5" | 3/4" | 1" | 0000000 | 000000 | |
| 0.61 | 9.9 | 4,000 | 4,000 | 1 1/16"-12 | 12 | 7/8"-14 | 10 | 4 5/8" | 5 1/8" | 3/4" | 1" | 0000000 | 000000 | |
| 0.98 | 11.9 | 4,000 | 3,000 | 1 1/16"-12 | 12 | 7/8"-14 | 10 | 4 5/8" | 5 1/2" | 3/4" | 1" | 0000000 | 000000 | |
| 1.16 | 14.1 | 4,000 | 3,000 | 1 5/16"-12 | 16 | 1 1/16"-12 | 12 | 4 5/8" | 5 5/8" | 3/4" | 1" | 0000000 | 000000 | |
| 1.4 | 15.9 | 3,200 | 2,800 | 1 5/16"-12 | 16 | 1 1/16"-12 | 12 | 4 5/8" | 5 7/8" | 3/4" | 1" | 0000000 | 000000 | |
| 1.65 | 16.1 | 2,700 | 2,400 | 1 5/16"-12 | 16 | 1 1/16"-12 | 12 | 4 5/8" | 6 1/8" | 3/4" | 1" | 0000000 | 000000 | |
Inlet Connection— UN/UNF (SAE Straight) | Outlet Connection— UN/UNF (SAE Straight) | Overall | Shaft | |||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Fixed Displacement Rate, cu. in./rev. | Max. Flow Rate, gpm | Max. Pressure, psi | Max. Speed, rpm | Thread Size | Dash Size | Thread Size | Dash Size | Ht. | Lg. | Dia. | Lg. | Choose a Drive Direction | Each | |
| 2.01 | 24.5 | 4,000 | 3,000 | 1 5/8"-12 | 20 | 1 5/16"-12 | 16 | 5 7/8" | 7 1/8" | 7/8" | 1 1/4" | 0000000 | 0000000 | |
| 2.32 | 28.3 | 4,000 | 3,000 | 1 5/8"-12 | 20 | 1 5/16"-12 | 16 | 5 7/8" | 7 3/8" | 7/8" | 1 1/4" | Clockwise | 0000000 | 000000 |
| 3.05 | 33.5 | 2,900 | 2,700 | 1 5/8"-12 | 20 | 1 5/16"-12 | 16 | 5 7/8" | 7 3/4" | 7/8" | 1 1/4" | 0000000 | 000000 | |
Inlet Connection— UN/UNF (SAE Straight) | Outlet Connection— UN/UNF (SAE Straight) | Overall | Shaft | |||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Fixed Displacement Rate, cu. in./rev. | Max. Flow Rate, gpm | Max. Pressure, psi | Max. Speed, rpm | Thread Size | Dash Size | Thread Size | Dash Size | Ht. | Lg. | Dia. | Lg. | Drive Direction | Each | |
| 0.07 | 0.8 | 3,000 | 4,000 | 9/16"-18 | 06 | 9/16"-18 | 06 | 3 7/16" | 4 5/8" | 1/2" | 1 3/8" | Clockwise and Counterclockwise | 0000000 | 0000000 |
| 0.13 | 1.7 | 3,000 | 4,000 | 3/4"-16 | 08 | 3/4"-16 | 08 | 3 7/16" | 4 5/8" | 1/2" | 1 3/8" | Clockwise and Counterclockwise | 0000000 | 000000 |
| 0.39 | 5 | 3,000 | 4,000 | 7/8"-14 | 10 | 7/8"-14 | 10 | 3 7/16" | 5 1/8" | 1/2" | 1 3/8" | Clockwise and Counterclockwise | 0000000 | 000000 |
| 0.71 | 5.4 | 1,800 | 2,400 | 7/8"-14 | 10 | 7/8"-14 | 10 | 3 7/16" | 5 5/8" | 1/2" | 1 3/8" | Clockwise and Counterclockwise | 0000000 | 000000 |
Hydraulic Power Units
Create and supply hydraulic pressure. Choose a unit with a tank capacity about three times greater than your requirement to allow for heat dissipation. An inlet filter protects the pump from contamination.
All units include an additional NPTF threaded inlet port. NPTF (Dryseal) threads are compatible with NPT threads. UN/UNF (SAE Straight) thread connections have straight threads and are also known as O-ring Boss fittings.
O'all | Inlet Connection— UN/UNF (SAE Straight) | Inlet Connection— NPTF | Outlet Connection— UN/UNF (SAE Straight) | ||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Max. Flow Rate, gpm | Max. Pressure, psi | Power, hp | Cap., gal. | Lg. | Wd. | Ht. | Thread Size | Dash Size | Pipe Size | Dash Size | Thread Size | Dash Size | Full Load Current | Each | |
240V AC/460V AC, Three Phase | |||||||||||||||
| 0.9 | 1,600 | 1 | 5 | 13" | 15" | 20 1/2" | 7/8"-14 | 10 | 1/2 | 08 | 7/8"-14 | 10 | 1.5 A @ 460 V AC | 00000000 | 000000000 |
| 1.3 | 2,300 | 2 | 5 | 13" | 15" | 24 1/2" | 7/8"-14 | 10 | 1/2 | 08 | 7/8"-14 | 10 | 2.8 A @ 460 V AC | 00000000 | 00000000 |
| 2.7 | 1,750 | 3 | 10 | 17 3/8" | 19" | 32 1/2" | 1 1/16"-12 | 12 | 3/4 | 12 | 1 1/16"-12 | 12 | 4.4 A @ 460 V AC | 00000000 | 00000000 |
| 3.6 | 2,050 | 5 | 10 | 17 3/4" | 19" | 29 3/4" | 1 1/16"-12 | 12 | 3/4 | 12 | 1 1/16"-12 | 12 | 6.8 A @ 460 V AC | 00000000 | 00000000 |
| 6.3 | 1,800 | 7 1/2 | 20 | 21 3/8" | 22 1/2" | 37 3/8" | 1 1/16"-12 | 12 | 3/4 | 12 | 1 1/16"-12 | 12 | 9.5 A @ 460 V AC | 00000000 | 00000000 |
| 8.6 | 1,700 | 10 | 30 | 21 3/8" | 22 1/2" | 42 1/4" | 1 1/16"-12 | 12 | 3/4 | 12 | 1 1/16"-12 | 12 | 12 A @ 460 V AC | 00000000 | 00000000 |
| 10.4 | 2,100 | 15 | 30 | 23 3/8" | 22 1/2" | 44 1/8" | 1 1/16"-12 | 12 | 3/4 | 12 | 1 1/16"-12 | 12 | 18.1 A @ 460 V AC | 00000000 | 00000000 |
Slim-Profile Hydraulic Power Units
Mount these units to an existing machine or where space is limited. They create and supply hydraulic pressure where standard models won’t fit. Choose a unit with a tank capacity about three times greater than your requirement to allow for heat dissipation.
Power Units | |||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
O'all | Inlet Connection— NPT | Outlet Connection— NPT | Replacement Tanks | ||||||||||||
| Max. Flow Rate, gpm | Max. Pressure, psi | Power, hp | Cap., gal. | Lg. | Wd. | Ht. | Pipe Size | Dash Size | Pipe Size | Dash Size | Full Load Current | Each | Each | ||
120V AC/240V AC, Single Phase | |||||||||||||||
| 1 | 2,500 | 2 | 2.3 | 36 1/8" | 8 1/8" | 8 5/8" | 1/4 | 04 | 3/8 | 06 | 10 A @ 240 V AC | 0000000 | 0000000 | 00000000 | 0000000 |
| 1.5 | 2,500 | 2 | 2.3 | 34 7/8" | 8 1/8" | 8 5/8" | 1/4 | 04 | 3/8 | 06 | 10 A @ 240 V AC | 0000000 | 000000 | 00000000 | 000000 |