3CP1221-3CP1231-3CP1241

Summary

Product identification

• O.E.M. 3CP Stainless Steel Plunger Pump
• Models: 3CP1221, 3CP1231, 3CP1241

Operating limits

• Pressure Range: 100 to 2000 PSI (7 to 140 BAR) for all models
• RPM: 1725 RPM for all models
• Inlet Pressure Range: Flooded to 70 PSI (Flooded to 4.9 BAR)
• Maximum Liquid Temperature: 160°F (71°C)
  • Note: Above 130°F, consult CAT PUMPS for inlet conditions and elastomer recommendations.

Product water

• Model 3CP1221
  • Flow: 4.2 GPM (16 L/M)
• Model 3CP1231
  • Flow: 2.3 GPM (8.7 L/M)
• Model 3CP1241
  • Flow: 3.6 GPM (13.6 L/M)

Electrical

Electric horsepower requirements vary by model, flow, and pressure. A detailed table is provided in the official PDF, outlining requirements for various pressures (1200, 1500, 2000 PSI / 85, 105, 140 BAR) at specified RPMs, using a 1750 RPM motor with a 5.0" pump pulley O.D. for the 3CP1221, and direct drive for 3CP1231 and 3CP1241. See the official PDF for exact tabulated values.

Mechanical / hydraulic

• Common Specifications (all models)
  • Bore: 0.709" (18 mm)
  • Crankcase Capacity: 10 oz. (0.3 L)
  • Inlet Ports (2): 1/2" NPTF
  • Discharge Ports (2): 3/8" NPTF
  • Pulley Mounting: Either Side
  • Shaft Diameter: 0.650" (16.5 mm)
  • Weight: 14.84 lbs. (6.7 kg)
  • Dimensions: 9.69x8.78x5.35" (246x223x136mm)
• Stroke
  • Model 3CP1221: 0.500" (12.7 mm)
  • Model 3CP1231: 0.276" (7 mm)
  • Model 3CP1241: 0.433" (11 mm)

Features

• Superior Design
  • Triplex plunger design delivers smoother liquid flow.
  • Hi-Pressure Seals are completely lubricated and cooled by the liquid being pumped.
  • Inlet and discharge valve assemblies interchange for easier maintenance.
  • Lubricated Lo-Pressure Seal provides double protection against external leakage.
  • Oil bath crankcase assures optimum lubrication.
  • Close tolerance concentricity of the ceramic plunger maximizes seal life.
• Quality Materials
  • Precision design 316 stainless steel valves and seats are hardened and polished for ultimate seating and extended valve life.
  • 316 SSL manifolds for strength and corrosion resistance.
  • Special concentric, high-density, polished, solid ceramic plungers provide a true wear surface and extended seal life.
  • Specially formulated, CAT PUMP exclusive, Hi-Pressure Seals offer unmatched performance and seal life.
  • Die cast aluminum crankcase provides high strength, minimum weight and precision tolerance control.
  • Chrome-moly crankshaft gives unmatched strength and surface hardness.
  • Oversized crankshaft bearings with greater capacity mean longer bearing life.
• Easy Maintenance
  • Wet-end is easily serviced without entering crankcase, requiring less time and effort.
  • Preset packings mean no packing gland adjustment is necessary, reducing maintenance costs.

Safety Warning

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 relief devices could result in personal injury or damage to the pump or to system components. CAT PUMPS does not assume any liability or responsibility for the operation of a customer’s high pressure system.

---

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 on the project.

Official datasheet (PDF)

Lenntech datasheet mirror