CAT 781 Stainless Steel Plunger Pump – 4.7 GPM, 5000 PSI, 1700 RPM

Model: 781
Category: Pressure Washer Pumps → Triplex Plunger Pumps
Type: CAT 781 Stainless Steel Plunger Pump – 4.7 GPM, 5000 PSI, 1750 RPM, 24mm Shaft

The CAT Pumps 781 Stainless Steel Plunger Pump is a heavy-duty triplex positive displacement reciprocating plunger pump engineered for high-pressure industrial applications involving harsh liquids and demanding operating conditions. Built with machined 316 stainless steel block-style inlet and discharge manifolds, 316 stainless steel valve assemblies, solid ceramic plungers, and standard NBR (Buna-N) seals and O-rings, this pump is designed for durability, corrosion resistance, and dependable long-term performance.

Key Features

• Genuine OEM CAT Pumps 781 triplex stainless steel plunger pump

• Delivers 4.7 GPM at 5000 PSI

• Operates at 1750 RPM

• Heavy-duty machined 316 stainless steel block-style manifolds

• 316 stainless steel valve assemblies

• Solid ceramic plungers for long wear life

• Standard NBR (Buna-N) seals and O-rings

• Triplex plunger design for high efficiency and low pulsation

• Suitable for harsh liquids, sanitizing chemicals, and food-related applications

• Compatible with belt-drive or direct-drive system options

Technical Specifications

Product Name: Stainless Steel Triplex Plunger Pump
Manufacturer: CAT Pumps
Part Number: 781

Flow Rate: 4.7 GPM
Maximum Pressure: 5000 PSI
RPM: 1750
Shaft Size: 24 mm
Bore Diameter: 14 mm
Stroke: 24 mm
Weight: 48.1 lbs.
Condition: New

Construction Details

• Machined 316 stainless steel block-style inlet and discharge manifolds

• 316 stainless steel valve assemblies

• Solid ceramic plungers

• Standard NBR (Buna-N) seals and O-rings

Design Advantages

• Triplex plunger design ensures high efficiency and low pulsation

• Durable V-packings are lubricated and cooled by the pumped liquid

• Belt-driven option allows for precise flow settings

• Direct-drive option supports a compact footprint for electric or hydraulic motor setups

• Standard NBR seals with alternative seal materials available for higher temperature or chemical compatibility

Typical Applications

• High-pressure industrial pumping systems

• Saltwater and leachate pumping

• Sanitizing chemical applications

• Food processing and special liquid handling systems

• Applications requiring a 4.7 GPM 5000 PSI stainless steel plunger pump