Description
The Cat Pumps Model 340 is a high-performance, frame-size 5 plunger pump known for its “over-built” design and extreme durability. Specifically engineered for continuous-duty industrial applications, this 5PFR (5-Frame, Plunger, Flow-Rated) pump is a favorite for systems requiring 1800 PSI at standard electric motor speeds.
Technical Specifications
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Flow Rate: 4.0 GPM (15.1 LPM)
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Pressure Range: 100 to 1800 PSI (7 to 124 bar)
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Speed: 1725 RPM
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Shaft Diameter: 20 mm (Solid Shaft)
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Inlet Port: 1/2″ NPT(F)
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Discharge Port: 3/8″ NPT(F)
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Max Liquid Temp: 160°F (71°C)
Key Features
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Triplex Design: Three ceramic plungers provide a smooth, consistent liquid flow with minimal pulsation.
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Solid Ceramic Plungers: Includes precision-ground alumina ceramic plungers that offer a diamond-hard surface, protecting the seals from premature wear and heat.
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Direct Drive Optimization: At 1725 RPM, it is designed for a 1:1 drive ratio, making it ideal for direct coupling to a standard 5.0 HP electric motor.
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Chrome-Moly Crankshaft: Provides superior strength and long-term reliability for the drive end, even under heavy-duty cycles.
Essential Service Kits
To keep the Model 340 operating at peak efficiency, the following genuine Cat Pumps kits are required for routine maintenance:
| Kit Description | Part Number | Quantity Required |
| Seal Kit (Standard) | 30623 | 1 Kit per pump |
| Valve Kit | 30821 | 2 Kits required for full service |
| Ceramic Plunger | 43316 | 3 required for full replacement |
| Crankcase Oil | 6107 | ISO 68 Non-Detergent (18 oz capacity) |




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