Cat Pumps
351 Cat Pump Triplex Positive Displacement Plunger 5.0 GPM 1500 PSI , Direct Drive , 316 Stainless Steel , Standard NBR (Buna-N) Seals
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351 Cat Pump Triplex Positive Displacement Plunger 5.0 GPM 1500 PSI , Direct Drive , 316 Stainless Steel , Standard NBR (Buna-N) Seals
CAT Pumps 351 5-Frame Plunger Pump
The CAT Pumps 351 is an industrial-duty, positive displacement triplex plunger pump belonging to the 5-Frame series. Engineered for continuous-duty performance in demanding environments, this pump is constructed with a 316 Stainless Steel manifold and valve assemblies, paired with solid ceramic plungers. This premium material selection provides exceptional structural integrity, chemical compatibility, and resistance to corrosion, making it a reliable solution for high-pressure systems including reverse osmosis, industrial cleaning, and commercial pressure washing.
Designed for operational versatility, the 351 utilizes a triplex reciprocating design that delivers consistent, low-pulsation fluid transfer. It operates at a flow rate of 5.0 GPM with a maximum pressure capacity of 1500 PSI at 1725 RPM. The pump is equipped with standard NBR (Buna-N) seals and O-rings, providing a durable, low-friction wear surface that extends maintenance intervals. Its robust design and 1725 RPM operating speed allow for multiple drive configurations, including direct drive with a bell housing and flexible coupling, or clutch and belt drive systems, providing the power required for mission-critical liquid handling.
| SPECIFICATION | DETAILS |
|---|---|
| Model Number | 351 |
| Manufacturer | CAT Pumps |
| Pump Type | Triplex Plunger Pump (5-Frame) |
| Manifold Material | 316 Stainless Steel |
| Max Flow Rate | 5.0 GPM (18.9 LPM) |
| Pressure Range | 100 - 1500 PSI |
| Test Pressure | 1500 PSI |
| Max Pump Speed | 1725 RPM |
| Inlet Port Size | 1/2" NPT(F) |
| Discharge Port Size | 3/8" NPT(F) |
| Shaft Diameter | 0.787" (20 mm) Solid |
| Max Liquid Temp (NBR) | 160°F (71°C) |
| Pump model | Flow | Pressure | Manifold material | RPM | HP | kW | ||
| GPM | LPM | PSI | BAR | |||||
| 351 | 5 | 18.9 | 1500 | 103 | SS | 1725 | 5.1 | 3.8 |
Max Volume: 5.0 GPM (19 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: 5.2 HP
Bore: 0.787" (20 mm)
Stroke: 0.472" (12 mm)
Crankcase Capacity: 18 oz. (0.55 L)
Max Fluid Temperature: 160°F (71°C)
Inlet Ports: (2) 1/2" NPT
Discharge Ports: (2) 3/8" NPT
Shaft Diameter(standard/dual): 0.787" (20 mm)
Weight: 19.8 lbs (9 kg)
Dimensions Standard: 11.5 " x 10.0 " x 5.28 " (292 x 254 x 134 mm)
Dimensions OEM: 11.5 " x 8.35 " x 5.28 " (292 x 212 x 134 mm)
Other Models Available Upon Request
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