CAT 291.0110 Plunger Pump – 3.5 GPM, 1200 PSI

Model: 291.0110
Category: Pressure Washer Pumps → Piston Pumps
Type: CAT 291.0110 Triplex Uniflow Piston Pump – 3.5 GPM, 1200 PSI, 1200 RPM, 16.5mm Shaft

The CAT Pumps 291.0110 is a compact triplex positive displacement reciprocating piston pump designed for dependable low-RPM belt-drive applications. Built with a 316 stainless steel manifold, 304 stainless steel valve assemblies, chrome-plated 304 stainless steel cylinders and sleeves, and fluorocarbon seals and O-rings, this pump is engineered for reliable performance, strong suction, and improved chemical compatibility compared to standard NBR-seal versions.

Key Features

• Genuine OEM CAT Pumps 291.0110 triplex UNIFLOW piston pump

• Delivers 3.5 GPM at 1200 PSI

• Operates at 1200 RPM

• Designed for low-RPM belt-drive applications

• Triplex UNIFLOW design for smooth, low-pulsation flow

• Mechanically actuated inlet valve for strong suction capabilities

• 316 stainless steel manifold for added corrosion resistance

• 304 stainless steel valve assemblies

• Chrome-plated 304 stainless steel cylinders and sleeves

• Fluorocarbon seals and O-rings for enhanced liquid compatibility

Technical Specifications

Product Name: Triplex UNIFLOW Piston Pump
Manufacturer: CAT Pumps
Part Number: 291.0110

Flow Rate: 3.5 GPM
Maximum Pressure: 1200 PSI
RPM: 1200
Shaft Size: 16.5 mm
Bore Diameter: 20 mm
Stroke: 12 mm
Weight: 12.1 lbs.
Condition: New

Construction Details

• 316 stainless steel manifold

• 304 stainless steel valve assemblies

• Hard chrome-plated 304 stainless steel cylinders and sleeves

• Fluorocarbon seals and O-rings

Design Advantages

• Triplex UNIFLOW design provides smooth, low-pulsation flow

• Mechanically actuated inlet valve supports strong suction and easier priming

• Hard chrome-plated cylinders and sleeves provide long life with mild liquids in a 5–9 pH range

• Fluorocarbon elastomers offer improved compatibility over standard seal materials in certain applications

• Suitable for dependable low-speed piston pump operation in commercial and industrial systems

Typical Applications

• Belt-drive pressure washer and pumping systems

• Commercial and industrial low-RPM fluid transfer applications

• Systems requiring strong suction and smooth flow characteristics

• Applications involving mild liquids and corrosion-resistant pump construction

• Equipment needing a 3.5 GPM 1200 PSI triplex piston pump