3C TRIPLEX Series

Summary

Product identification

• SEKO 3C TRIPLEX Series Three Plunger Reciprocating Pumps.
• Designed according to API 674 Standards.
• Models include: TRIPLEX 3C30, TRIPLEX 3C55, TRIPLEX 3C80, TRIPLEX 3C120, TRIPLEX 3C120TC.
• SEKO also offers SW3C Hydraulic diaphragm pumps (e.g., SW3C90) for transfer of abrasive suspensions, slurries, and dangerous liquids, designed for remote or automatic control and offering up to 60% energy savings compared to traditional pumping systems.

Mechanical / Hydraulic

• Pump Type: Three plunger reciprocating pumps with horizontally arranged, single-acting plungers. Valves and seats can be selected based on the handled medium.
• Lubrication: Integral lubrication system (no forced lubrication).
• Design Features:
  • Accurate mass balancing and ruggedness, contributing to higher reliability, lower cost, and less maintenance.
  • Lower weight-to-performance ratio, optimized for offshore topsides installation and simpler foundation design.
  • Unique head design optimized for simple maintenance operations, extending packing life and reducing downtime.
  • Low operating speed reduces wear on moving parts, plungers, valves, and packing.
  • Plunger and packing maintenance is simplified; for pump sizes other than 3C30, replacement can be done from the front of the pump head or stuffing box side without disconnecting piping.
  • The mechanism allows operation at very low speeds, suitable for pumping viscous liquids, hot products, or liquids with low vapor pressure to avoid cavitation.
  • Silent and vibrationless operation due to correct mass balancing and sizing.
  • Integral crankshaft supported by roller bearings at both ends; crossheads supported at both ends for precise plunger rod alignment and longer sealing life.
  • Compact and robust assembly, offering high performance in limited overall dimensions.
  • Options for "leakage return to suction" and flushing of stuffing box are available on request to extend packing life and prevent air suction.
• Liquid End Materials: SS 316 L, 304 SS, or C.S. (Carbon Steel); different materials available on request.
• Special Execution: Double head execution is available for the 3C120 model, allowing capacities to be doubled.
• Accessories for Installation:
  • Safety valves: Installed to protect the pump and pipeline from unexpected overpressure.
  • Pulsation dampers: Suggested to reduce high pressure fluctuations or to achieve flow linearity.

Operating Limits

TRIPLEX 3C30

• Flow rate: from 40 to 5000 l/h
• Pressure: from 1150 to 70 barg
• Piston diameter: from 10 to 40 mm

TRIPLEX 3C55

• Flow rate: from 664 to 16,000 l/h
• Pressure: from 214 to 39 barg
• Piston diameter: from 10 to 40 mm

TRIPLEX 3C80

• Flow rate: from 966 to 25,429 l/h
• Pressure: from 370 to 52 barg
• Piston diameter: from 30 to 80 mm

TRIPLEX 3C120

• Flow rate: from 1450 to 35,000 l/h
• Pressure: from 728 to 80 barg
• Piston diameter: from 30 to 90 mm

TRIPLEX 3C120TC

• Flow rate: from 2,900 to 65,000 l/h
• Pressure: from 570 to 62 barg
• Piston diameter: from 30 to 90 mm

Electrical

• Flow-rate adjustment: Capacity can be adjusted by electrical motor speed variation with an appropriate frequency converter.
• Motor Power:
  • TRIPLEX 3C30: 2.2, 3, 4, 5.5, 7.5, 9.2, 10, 15 kW
  • TRIPLEX 3C55: 5.5, 7.5, 9.2, 15, 18.5, 22, 30 kW
  • TRIPLEX 3C80: 9.2, 15, 18.5, 22, 30, 37, 45, 55 kW
  • TRIPLEX 3C120 & 3C120TC: 37, 45, 55, 75, 90, 110 kW

Applications

• Oil and Gas: Glycol for gas dehydration; methanol injection; well stimulation & service; hydrocarbon condensate.
• Iron, steel and metal industry: Descaling in metallurgical plants.
• Chemical industry: Fatty acids pumping (for glycerine production, raw material production for surface-active, stearine production).
• Ceramic industry: Spray dryer, abrasive suspensions.
• Water Treatment: Feeding of factory wastes to wet oxidation treatment plants, reverse osmosis plants.
• Desalination: Feeding of reverse osmosis plants.
• Food industry: Feeding of fruit puree to heat exchangers in pasteurization, transfer of tomato concentrate, homogenizers feeding.

Standards

• Compliance with International Standards/Approvals including API 674, ASME, GOST-R.

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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 official OEM PDF datasheet. Contractual data must always match the specific OEM PDF revision used for the project.

Official datasheet (PDF)

Lenntech datasheet mirror