Cat Pumps
231 Cat Pump 2.3 GPM 1500 PSI Direct Drive, 316 Stainless steel
231 Cat Pump 2.3 GPM 1500 PSI Direct Drive, 316 Stainless steel
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231 Cat Pump 2.3 GPM 1500 PSI Direct Drive, 316 Stainless steel
Cat Pumps 231 3-Frame Triplex Plunger Pump
The Cat Pumps 231 is an industrial-duty, 3-frame triplex positive displacement plunger pump engineered for high-pressure, continuous-duty liquid transfer. Constructed with a precision-machined 316 stainless steel manifold and 316 stainless steel valve assemblies, this pump offers exceptional structural strength and superior corrosion resistance. This premium metallurgy makes it an ideal choice for demanding applications such as reverse osmosis (RO), desalination, chemical injection, and harsh fluid handling where standard brass components would prematurely degrade. The wet-end features highly polished, solid ceramic plungers that provide a true wear surface to minimize friction and heat, significantly extending seal life under rigorous industrial conditions.
Designed to maximize uptime and efficiency, the 231 model delivers a steady flow rate of 2.3 gallons per minute (GPM) while operating at a maximum pressure of 1,500 PSI. Driven at an optimal speed of 1725 RPM, it features a durable die-cast aluminum crankcase with splash oil lubrication to ensure maximum load capacity and bearing life. The pump comes standard with NBR (Buna-N) seals and O-rings, allowing it to safely handle liquid temperatures up to 160°F (71°C). Its compact footprint and versatile design permit multiple drive configurations—including belt drive, clutch, or direct-drive with a bell housing and flexible coupling—providing a reliable, low-pulsation flow for aggressive liquids and high-salinity water systems.
| Specification | Details |
|---|---|
| Model Number | 231 |
| Manufacturer | Cat Pumps |
| Pump Type | Triplex Plunger Pump |
| Manifold Material | 316 Stainless Steel |
| Max Flow Rate | 2.3 GPM (8.7 LPM) |
| Max Operating Pressure | 1500 PSI (103 bar) |
| Test PSI (Applied Pressure) | 1500 PSI (103 bar) |
| Max Pump Speed | 1725 RPM |
| Max Liquid Temp | 160°F (71°C) |
| Inlet Port Size | (2) 1/2" NPT(F) |
| Discharge Port Size | (2) 3/8" NPT(F) |
| Stroke | 0.287" (7.3 mm) |
| Bore | 0.709" (18 mm) |
| Crankcase Capacity | 15 oz (0.44 L) |
| Pump model | Flow | Pressure | Manifold material | RPM | HP | kW | ||
| GPM | LPM | PSI | BAR | |||||
| 231 | 2.3 | 8.7 | 1500 | 103 | SS | 1725 | 2.4 | 1.8 |
Max Volume: 2.3 GPM (9 L/M)
Max Discharge Pressure: 100 to 1500 PSI (7 to 105 Bar)
Max inlet Pressure: Flooded to 60 PSI (4 Bar)
Max RPM: 1725 RPM
Max Horsepower: 2.4 HP
Bore: 0.709" (18 mm)
Stroke: 0.276" (7 mm)
Crankcase Capacity: 10 oz. (0.3 L)
Max Fluid Temperature: 160° F ( 71° C)
Inlet Ports: (2) 1/2" NPT
Discharge Ports: (2) 3/8" NPT
Shaft Diameter: 0.650" (16.5 mm)
Weight: 14.4 lbs (6.5 kg)
Dimensions: 10.3" x 8.8" x 5.2" (261 x 223 x 131 mm)
Other Models Available Upon Request
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