Description
Elevate your marine water quality with the RK75PE, a saltwater protein fractionator from RK2 Systems—trusted by aquaculture, public aquariums, and aquaponics professionals alike. Engineered with precision and built for durability, this model delivers exceptional removal of dissolved organics, proteins, suspended particulates, and even tints, while boosting dissolved oxygen and reducing bacterial loads.
Key Features & Benefits
- Robust One-Piece Construction: The reaction chamber is molded from high-density polyethylene (HDPE) in a seamless, rotational design—eliminating weak weld points and providing excellent resistance to ozone and corrosion.
- Counter-Current Flow Design: Dirty water is fed in at the top of the chamber and travels downward through rising air bubbles, allowing for highly efficient mass mixing and optimal foam formation.
- Air / Ozone Injection System: Equipped with Mazzei® venturi injectors made from ozone-resistant Kynar®, the fractionator supports both air and ozone injection for enhanced waste removal and oxidation.
- Automated Wash-Down System: A built-in rinse system keeps internal surfaces clean and prevents buildup of dried foam, minimizing maintenance interventions.
- Clear Sight Gauge: Monitor fluid levels and foam formation in real-time via a transparent sight window.
- Durable Valves & Fittings: Fitted with Hayward® or Asahi® ball valves and Spears® piping/fittings for reliable, long-term use in marine environments.
- Powerful Performance: Supports a flow rate of 265-397 LPM with a 2-minute contact time at standard dwell, or a higher flow rate at 1.5-minute dwell.
- Sturdy Footprint: With a 60.96 cm diameter, total height of 259.08 cm, and dry weight of around 107 kg, the RK75PE is engineered for demanding systems while maintaining a manageable footprint.
- Waste Collection & Drainage: The fractionator captures concentrated foam in a collection cup, allowing clean drainage and effective export of organics via gravity.
- Ozone-Ready Port: A designated ozone gas connection port allows seamless integration with your ozone generator system for advanced oxidation.
| Model | Recommended Flow* | High-Flow Option* | Chamber Diameter | Overall Height | Footprint | Dry Weight |
|---|---|---|---|---|---|---|
| RK25PE | 20 GPM / 4.5 m³/h | — | 14″ / 356 mm | 77″ / 1,956 mm | 24″ × 36″ / 610 × 914 mm | 102 lb / 46 kg |
| RK50PE | 40 GPM / 9.1 m³/h | — | 20″ / 508 mm | 99″ / 2,515 mm | 32″ × 44″ / 813 × 1,118 mm | 220 lb / 100 kg |
| RK75PE | 70 GPM / 15.9 m³/h | 105 GPM / 23.9 m³/h | 24″ / 610 mm | 102″ / 2,591 mm | 32″ × 44″ / 813 × 1,118 mm | 235 lb / 107 kg |
| RK150PE | 155 GPM / 35.2 m³/h | 230 GPM / 52.2 m³/h | 36″ / 914 mm | 101″ / 2,565 mm | 41″ × 54″ / 1,041 × 1,372 mm | 365 lb / 166 kg |
| RK300PE | 290 GPM / 65.9 m³/h | 435 GPM / 98.4 m³/h | 48″ / 1,219 mm | 110″ / 2,794 mm | 54″ × 66″ / 1,372 × 1,676 mm | 440 lb / 200 kg |
| RK600PE | 585 GPM / 132.5 m³/h | 890 GPM / 201.8 m³/h | 60″ / 1,524 mm | 144″ / 3,658 mm | 69″ × 78″ / 1,753 × 1,981 mm | 750 lb / 340 kg |
| RK1000PE | 1,100 GPM / 249.8 m³/h | — | 84″ / 2,134 mm | 144″ / 3,658 mm | 92″ × 114″ / 2,337 × 2,896 mm | 900 lb / 408 kg |
| RK2000PE | 1,500 GPM / 340.7 m³/h | — | 84″ / 2,134 mm | 168″ / 4,267 mm | 92″ × 114″ / 2,337 × 2,896 mm | 1,200 lb / 544 kg |
| Model | Flow Rate | Diameter | Venturi pump | Height | Footprint | Operational weight | Dry Weight |
|---|---|---|---|---|---|---|---|
| RK10AC | 35-75 LPM | 25.4 CM | 1/6 HP PUMP | 230 VAC, 1 PH | 215.9 CM | 38.1 X 91.44 CM | 124.73 KG | 45.35 KG |
| RK25PE | 76-133 LPM | 35.56 CM | 1/6 HP PUMP | 230 VAC, 1 PH | 195.58 CM | 60.96 X 91.44 CM | 200 KG | 47 KG |
| RK50PE | 152-228 LPM | 50.8 CM | 1/2 HP PUMP | 230VAC, 1 PH | 251.46 CM | 81.28 X 86.36 CM | 477 KG | 100 KG |
| RK75PE | 265-398 LPM | 60.96 CM | 1 HP PUMP | 230 VAC, 1 PH | 259.08 CM | 81.28 X 86.36 CM | 636 KG | 107 KG |
| RK75PE-HF | 398-530 LPM | 60.96 CM | 1.5 HP PUMP | 230 VAC, 1 PH | 259.08 CM | 81.28 X 86.36 CM | 636 KG | 107 KG |
| RK150PE | 587-871 LPM | 91.44 CM | 1.5 HP PUMP | 230 VAC, 1 PH | 256.54 CM | 104.14 X137.16 CM | 1352 KG | 166 KG |
| RK150PE-HF | 871-1,174 LPM | 91.44 CM | 1.5 HP PUMP | 230 VAC, 1 PH | 256.54 CM | 104.14 X 137.16 CM | 1352 KG | 166 KG |
| RK300PE | 1,098-1,647 LPM | 121.92 CM | 1.5 HP PUMP | 230 VAC, 1 PH | 279.40 CM | 137.60 X 167.64 CM | 2305 KG | 200 KG |
| RK300PE-HF | 1,647-2,196 LPM | 121.92 CM | 2 HP PUMP | 230 VAC, 1 PH | 279.40 CM | 137.60 X 167.64 CM | 2305 KG | 200 KG |
| RK600PE | 3,370-4,505 LPM | 152.4 CM | (2) 1.5 HP PUMPS | 230 VAC, 1 PH | 365.76 CM | 175.26 X 198.12 CM | 4847 KG | 341 KG |
| RK600PE-HF | 3,370-4,505 LPM | 152.4 CM | (2) 2 HP PUMPS | 230 VAC, 1 PH | 365.76 CM | 175.26 X 198.12 CM | 4847 KG | 341 KG |
| RK1000PE | 4,164-6,246 LPM | 213.96 CM | (4) 1.5 HP PUMPS | 230 VAC, 1 PH | 365.76 CM | 233.68 X 289.56CM | 9242 KG | 409 KG |
| RK2000PE | 5,679-7,571 LPM | 213.96 CM | (4) 2 HP PUMPS | 230 VAC, 1 PH | 426.72 CM | 238.76 X 289.56 CM | 11,585 KG | 545 KG |
Why Choose the RK75PE?
Superior Water Quality: By removing dissolved organics and proteins, this fractionator helps reduce bacterial loads, improve water clarity, and enrich oxygen levels—benefiting both animal health and system stability.
Long-Term Reliability: Built to withstand saltwater conditions and ozone exposure, the HDPE body and stainless hardware deliver rugged, maintenance-friendly performance.
Scalable Solution: Ideal for mid-to-large-scale systems—whether it’s a public aquarium, aquaculture facility, or live seafood holding tank—the RK75PE enables modular design and reliable fractionation at commercial throughput.
Optimized Efficiency: The counter-current design ensures maximal contact between water and foam bubbles, improving the efficiency of organic removal vs traditional filtration methods.
Applications:
Perfect for aquaculture, marine exhibits, research facilities, aquaponics systems, or any saltwater life support system that demands superior filtration, oxygenation, and organic load control.
Technical Specifications — RK75PE Saltwater Protein Fractionator
Parameter Specification
Model RK75PE (Saltwater, HDPE)
Water Flow Rate (Dwell Time) 70 GPM @ 2-minute dwell / 105 GPM @ 1.5-minute dwell (approx. 265-397 LPM)
Reaction Chamber Diameter 60.96 cm
Height (Floor to Top) 259.08 cm
Footprint 81.28 x 86.36 CM
Dry Weight 107 kg
Operational (Wet) Weight 636 kg
Material — Reaction Chamber Rotationally molded high-density polyethylene (HDPE)
Injector / Venturi Mazzei® venturi injector, ozone-resistant Kynar®
Gas Injection Ports Air / ozone injection port standard
Rinse System Automated wash-down (rinse) system for upper chamber / riser
Sight / Monitoring Clear sight gauge
Standard Valves / Fittings Hayward® or Asahi® ball valves; Spears® piping & fittings
Venturi Pump 1 HP Pump | 230 VAC, 1 PH
Water Type Saltwater
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