Plunger Pumps
CAT Pumps plunger pumps are positive displacement, reciprocating pumps used across pressure washing, industrial cleaning, reverse osmosis and watermaker systems, oilfield and TEG dehydration service, hydro-demolition, and general high-pressure fluid transfer. Unlike centrifugal pumps, a plunger pump displaces a fixed volume of fluid with each stroke of its plungers, delivering steady, predictable flow and pressure that holds up under demanding, continuous-duty conditions. Manufactured by Cat Pumps Corporation (Minneapolis, MN), these pumps are built with hardened plunger surfaces, engineered valve assemblies, and a choice of manifold materials suited to the fluid being handled — from forged brass for general water service to 316 stainless steel, duplex stainless steel, and nickel aluminum bronze for corrosive, high-salinity, or chemically aggressive applications.
This collection spans a wide range of frame sizes and configurations, from compact 2SF and 3-frame direct-drive pumps suited to RO and watermaker systems, through gas-engine-mount pressure washer pumps built to SAE J609 flange standards, up to heavy-duty 35-frame, 38-frame, and 60-frame pumps rated for tens of gallons per minute in industrial, oilfield, and hydro-demolition service. Selecting the right pump comes down to matching flow rate and pressure to your system's requirements, then choosing a manifold material and seal type suited to the fluid and duty cycle involved.
Compact & Direct-Drive Plunger Pumps (2SF / 3-Frame / 5-Frame)
|
Model
|
Flow Rate
|
Max Pressure
|
Manifold Material
|
Drive / Mount
|
|
2SFQ25SEEL
|
2.5 GPM
|
1200 PSI
|
316 Stainless Steel
|
Direct Drive
|
|
2SF22SEEL
|
2.2 GPM
|
1200 PSI
|
316 Stainless Steel
|
Direct Drive
|
|
5CPQ6221
|
6 / 7.4 GPM*
|
2000 / 1500 PSI*
|
316 Stainless Steel
|
Quiet Direct Drive
|
|
5CPQ6221G1.0220
|
7.4 GPM
|
1500 PSI
|
316 Stainless Steel
|
Integral Gearbox
|
|
351
|
5.0 GPM
|
1500 PSI
|
316 Stainless Steel
|
Direct Drive
|
|
311
|
4 GPM
|
2200 PSI
|
316 Stainless Steel
|
Belt / Clutch / Bellhousing
|
|
5CP6221
|
6 GPM
|
2000 PSI
|
316 Stainless Steel
|
Belt / Clutch / Bellhousing
|
|
3CP1211CS
|
5 GPM
|
1700 PSI
|
Chrome-Plated 304 SS
|
Direct Drive
|
|
240
|
3.6 GPM
|
1200 PSI
|
Forged Brass
|
Direct Drive
|
|
247
|
3.6 GPM
|
1200 PSI
|
Nickel Aluminum Bronze
|
Belt / Clutch / Bellhousing
|
|
340
|
4 GPM
|
1800 PSI
|
Brass
|
Belt / Clutch / Bellhousing
|
|
3CP1140.44101
|
3.6 GPM
|
2200 PSI
|
Brass
|
Direct Drive
|
|
5CP2150W.44101
|
5 GPM
|
2000 PSI
|
Brass
|
Belt / Clutch / Bellhousing
|
|
5CP3120CSSG1
|
4.5 GPM
|
3500 PSI
|
316 Stainless Steel
|
Gearbox (Gas Engine)
|
|
5CP3160CSSG1
|
4 GPM
|
3500 PSI
|
316 Stainless Steel
|
Gearbox (Gas Engine)
|
*5CPQ6221 is rated 6 GPM at 2000 PSI or 7.4 GPM at 1500 PSI depending on drive speed.
Gas-Engine Pressure Washer Pumps (SAE J609 Flange Mount)
|
Model
|
Flow Rate
|
Max Pressure
|
Manifold Material
|
Drive / Mount
|
|
66DX40G1I
|
4.0 GPM
|
4000 PSI
|
Forged Brass
|
1" Crankshaft, Gas Flange
|
|
66DX35G1I
|
3.5 GPM
|
4000 PSI
|
Forged Brass
|
1" Crankshaft, Gas Flange
|
|
67DX39G1I
|
3.9 GPM
|
4000 PSI
|
Forged Brass
|
1" Crankshaft, Gas Flange
|
|
3CP1120G
|
3.5 GPM
|
2200 PSI
|
Forged Brass
|
Gearbox, 3/4" Shaft
|
|
4DNX25GSI
|
2.5 GPM
|
3000 PSI
|
Forged Brass
|
3/4" Hollow Shaft
|
|
4DX29GUIF
|
2.9 GPM
|
2600 PSI
|
Brass
|
3/4" Crankshaft
|
|
2SF30GS
|
3.0 GPM
|
2000 PSI
|
Block-Style Brass
|
3/4" Crankshaft
|
|
2SF35GS
|
3.5 GPM
|
2000 PSI
|
Brass
|
3/4" Crankshaft
|
|
2SFX30GZI
|
3.0 GPM
|
2500 PSI
|
Brass
|
3/4" Shaft, Ball Bearing
|
|
2SF30ES
|
3.0 GPM
|
1500 PSI
|
Block-Style Brass
|
Electric Motor, 5/8" Shaft
|
|
7CP6170G1
|
12 GPM
|
1800 PSI
|
Brass
|
Gearbox, 1" Shaft
|
|
790712 / 3SPX30G1I / 4SPX32G1I†
|
3.0–3.2 GPM
|
3000 PSI
|
Brass
|
1" Crankshaft, Gas Flange
|
†These three listings share nearly identical specs and may represent overlapping or duplicate products — see note below.
25-Frame Plunger Pumps
|
Model
|
Flow Rate
|
Max Pressure
|
Manifold Material
|
Drive / Mount
|
|
2531
|
25 GPM
|
1200 PSI
|
316 Stainless Steel
|
Flange-Mount
|
|
2560
|
16 GPM
|
3000 PSI
|
Block-Style Brass
|
Flange-Mount
|
|
2560BH
|
16 GPM
|
3000 PSI
|
Block-Style Brass
|
Flange-Mount, Bell Housing
|
|
2565
|
20 GPM
|
2500 PSI
|
Block-Style Brass
|
Flange-Mount
|
|
2565BH
|
20 GPM
|
2500 PSI
|
Block-Style Brass
|
Flange-Mount, Bell Housing
|
35-Frame Plunger Pumps
|
Model
|
Flow Rate
|
Max Pressure
|
Manifold Material
|
Drive / Mount
|
|
3560
|
20 / 25 GPM
|
4000 / 3000 PSI
|
Brass Block / Stainless Steel
|
Flange-Mount
|
|
3560P
|
20 / 25 GPM
|
4000 / 3000 PSI
|
Brass Block / Stainless Steel
|
Flange-Mount
|
|
3550
|
10 GPM
|
6000 PSI
|
Chrome-Plated Brass Block
|
Flange-Mount
|
|
3507HS
|
10 GPM
|
5000 PSI
|
Nickel Aluminum Bronze
|
Flange-Mount
|
|
3501.44101
|
10 GPM
|
5000 PSI
|
316 Stainless Steel
|
Flanged (TEG Service)
|
|
3531DHS.0770
|
36 GPM
|
1200 PSI
|
316 Stainless Steel Block
|
Flange-Mount
|
|
3537HS
|
36 GPM
|
1200 PSI
|
Nickel Aluminum Bronze
|
Flange-Mount
|
|
3537HS.44101
|
36 GPM
|
1200 PSI
|
Nickel Aluminum Bronze
|
Flange-Mount (TEG Service)
|
|
3541DHS
|
45 GPM
|
1000 PSI
|
316 Stainless Steel
|
Belt / Coupling / Bellhousing
|
|
3541DHS.0110
|
45 GPM
|
1000 PSI
|
316 Stainless Steel
|
Reverse Rotation
|
Heavy-Duty, Duplex & Specialty Plunger Pumps
|
Model
|
Flow Rate
|
Max Pressure
|
Manifold Material
|
Drive / Mount
|
|
67102
|
100 GPM
|
1000 PSI
|
Duplex Stainless Steel
|
60-Frame, Flanged
|
|
1051D.0110
|
10 / 12.3 GPM
|
2200 / 1800 PSI
|
Duplex Stainless Steel
|
15-Frame, Flanged
|
|
3811HS
|
14 GPM
|
3000 PSI
|
316 Stainless Steel
|
38-Frame, Flanged
|
|
781.4410
|
4.7 GPM
|
5000 PSI
|
316 Stainless Steel
|
8-Frame, Flanged
|
|
1810
|
3 GPM
|
10,000 PSI
|
Stainless Steel
|
Block-Style (Water Blasting)
|
