2831-2831K

Summary

Product Identification

The CAT Pumps Models 2831 and 2831K are 28 Frame Block-Style Stainless Steel Plunger Pumps.

• Model 2831: Standard Model
• Model 2831K: Flushed Model

Operating Limits

• Maximum Liquid Temperature: 160 °F (71 °C)
  • Note: Above 130°F, contact CAT PUMPS for inlet conditions and elastomer recommendations.

Feed Water

• Inlet Pressure Range: Flooded to 70 PSI (Flooded to 4.9 BAR)
  • Note: "K" models feature special inlet ports for cooling/flushing and containment of hazardous liquids. Contact CAT PUMPS for additional information.

Mechanical / Hydraulic Specifications

Standard Specifications (Model 2831):

• Flow: 25 GPM (95 L/M)
• Pressure Range: 100 to 1000 PSI (7 to 70 BAR)
• RPM: 1025 RPM (1025 RPM)

Alternate Specifications (e.g., Model 2831K or different operating point):

• Flow: 21 GPM (80 L/M)
• Pressure Range: 100 to 1200 PSI (7 to 85 BAR)
• RPM: 860 RPM (860 RPM)

Common Specifications:

• Bore: 1.260" (32 mm)
• Stroke: 1.516" (38.5 mm)
• Crankcase Capacity: 84 oz. (2.5 L)
• Inlet Ports (2): 1-1/4" NPTF
• Flushing Ports (2): 1/4" NPTF
• Discharge Ports (2): 3/4" NPTF
• Pulley Mounting: Either Side
• Shaft Diameter: 1.181" (30 mm)
• Weight: 104 lbs. (42.7 kg)
• Dimensions: 18.98 x 15.04 x 8.03" (482 x 382 x 204 mm)

Performance Data

The document includes a table for "ELECTRIC HORSEPOWER REQUIREMENTS" which lists various flow rates, pressures, and RPMs with corresponding drive pressure values. For exact tabulated values and to determine required horsepower, refer to the official PDF.

Formulas provided:

• Determining Pump RPM: Rated G.P.M. / "Desired" G.P.M. = Rated R.P.M. / "Desired" R.P.M.
• Determining Required H.P.: GPM x PSI / 1460 = Electric Brake H.P. Required
• Determining Motor Pulley Size: Motor Pulley O.D. / Pump Pulley O.D. = Pump R.P.M. / Motor R.P.M.

Features

• Superior Design:
  • Triplex plunger design for smoother liquid flow.
  • Interchangeable inlet and discharge valve assemblies for easier maintenance.
  • Oil bath crankcase for optimum lubrication.
  • Close tolerance concentricity of ceramic plunger maximizes seal life.
  • Standard Models: Lo-Pressure Seals and V-Packings are lubricated and cooled by the pumped liquid.
  • Flushed Models: Special ported inlet manifold allows liquid to cool or flush between V-Packings and Lo-Pressure Seals, protecting against high temperatures or contaminating liquids.
• Quality Materials:
  • Precision design 316 stainless steel valves and seats, hardened and polished.
  • 316 SSL block-style manifolds for strength and corrosion resistance.
  • Special concentric, high-density, polished, solid ceramic plungers.
  • CAT PUMP exclusive Hi-Pressure Seals.
  • Die cast aluminum crankcase for high strength, minimum weight, and precision tolerance control.
  • Optional Cast Iron crankcase for hazardous environments.
  • Chrome-moly crankshaft for strength and surface hardness.

Maintenance

• Wet-end is easily serviced without entering the crankcase.
• Preset packings eliminate the need for packing gland adjustment.

Important Notes

• All systems require both a primary pressure regulating device (e.g., regulator, unloader) and a secondary pressure safety relief device (e.g., pop-off valve, safety valve). Failure to install such devices could result in personal injury or damage.
• CAT PUMPS does not assume liability or responsibility for the operation of a customer’s high-pressure system.

Optional Accessories

• Flushing Assembly: 5 gal, 115V, 1.1 Amp, 1/2" NPT (available for 2831K)
• C.A.T. (Captive Acceleration Tube)
• Oil, Case (ISO 68 Multi-viscosity Hydraulic)
• Lubricant, Antiseize

---

Disclaimer: This summary is based on extracted text and may not include all figures, footnotes, or the latest revisions present in 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