621

Summary

Product Identification

This document covers 10 Frame Piston Pumps, available in several models and configurations:

• Standard Brass Models: 623, 820, 1010
• Stainless Steel Models: 621, 821, 1011
• Pulse Pump Manifold Models: 625, 825, 1015

Operating Limits

Common Specifications

• Crankcase Capacity: 40 oz. (1.2 l)
• Maximum Liquid Temperature: 160°F (71°C)
  • Note: Above 130°F, contact CAT PUMPS for inlet conditions and elastomer recommendations.
• Inlet Pressure Range: –8.5 to +40 psi (–0.6 to +2.8 bar)

Model-Specific Performance

MODEL 623, 621, 625

• Flow: 6.0 gpm (23 lpm)
• Pressure Range: 100 to 1200 psi (7 to 85 bar)
• RPM: 850 rpm
• Bore: 0.787" (20 mm)
• Stroke: 1.122" (28.5 mm)

MODEL 820, 821, 825

• Flow: 10 gpm (38 lpm)
• Pressure Range: 100 to 1000 psi (7 to 70 bar)
• RPM: 940 rpm
• Bore: 0.984" (25 mm)
• Stroke: 1.102" (28 mm)

MODEL 1010, 1011, 1015

• Flow: 13 gpm (49 lpm)
• Pressure Range: 100 to 700 psi (7 to 50 bar)
• RPM: 900 rpm
• Bore: 1.122" (28.5 mm)
• Stroke: 1.102" (28 mm)

Mechanical / Hydraulic

• Inlet Ports (1): 1" NPTF
• Discharge Ports (3): 3/4" NPTF
• Shaft Diameter: 0.984" (25 mm)
• Weight: 34.6 lbs. (15.7 kg)
• Dimensions: 17.28 x 11.42 x 6.30" (439 x 290 x 160 mm)

Electrical

The document provides formulas for determining pump RPM, required horsepower, and motor pulley size. A table for "ELECTRIC HORSEPOWER REQUIREMENTS" is included, showing RPM and motor pulley diameter for various flow rates and pressures.

• Determining Pump R.P.M.: (Rated gpm / "Desired" gpm) = (Rated rpm / "Desired" rpm)
• Determining Required H.P.: (gpm x psi) / 1460 = H.P. Required
• Determining Motor Pulley Size: (Motor Pulley O.D. / Pump rpm) = (Pump Pulley O.D. / Motor rpm)

See the official PDF for exact tabulated values of electric horsepower requirements.

Features

• Triplex Uniflow design for continuous forward liquid flow and smooth operation.
• Wetted cups and floating pistons are lubricated and cooled by pumped liquid for extended cup life.
• Mechanically actuated inlet valves provide strong lift and easy prime.
• Oil bath crankcase ensures optimum lubrication.
• 100% wetted seal design allows pumped liquid to cool and lubricate for longer life.
• Die cast aluminum crankcase offers high strength, lightweight, and excellent tolerance control.
• Oversized crankshaft bearings provide extended bearing life and pump performance.
• Chrome-moly crankshaft ensures unmatched strength and surface hardness for long life.
• Matched oversized TNM connecting rods for superior tensile strength and bearing quality.
• Piston rods are high tensile strength stainless steel with Zamak crossheads.
• Stainless steel slinger provides back-up protection for the crankcase seal, preventing pumped liquids from entering the crankcase.
• Patented stepped piston rod with hard chrome plated stainless steel sleeve offers a durable wear surface and easy wet-end servicing.
• Cylinder and sleeve wear surfaces are hard chrome plated 304 stainless steel for longer service life.
• Manifolds are made of high tensile strength chrome plated brass or 316 stainless steel for special corrosion resistance.
• 304 stainless steel valves, seats, and springs provide corrosion-resistance, ultimate seating, and extended life.
• Crossheads are 360° supported for uncompromising alignment.

Safety Information

All high-pressure systems require a primary pressure regulating device (e.g., regulator, unloader) and a secondary pressure relief device (e.g., pop-off valve, relief valve). Failure to install such relief devices could result in personal injury or damage to the pump or property.

Users should read all CAUTIONS and WARNINGS before commencing service or operation of any high-pressure system. These are included in each service manual and accessory data sheet.

Parts List and Exploded View

Detailed parts lists with part numbers, descriptions, quantities, and material codes (e.g., NBR, FPM, PTFE, 304SS, 316SS) are provided for all models. An exploded view diagram illustrates the pump components.

See the official PDF for complete parts lists and exploded view diagrams.

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Disclaimer: This summary is based on extracted text and may not include all figures, footnotes, or the latest revisions from the complete OEM PDF datasheet. Contractual data must always match the specific OEM PDF revision used for the project.

Official datasheet (PDF)

Lenntech datasheet mirror