RKSS21.15N | 5.5 GPM 3000 PSI Triplex Pump, 1450 RPM, SS 24mm

RKSS21.15N — 5.5 GPM 3000 PSI AISI 316 Stainless Triplex Pump

• The RKSS21.15N is a stainless steel triplex plunger pump engineered for aggressive, corrosive, and sanitary washdown environments where standard brass-head pumps will not survive.
• Delivering 5.5 GPM at 3000 PSI at 1450 RPM, it provides heavy washdown power at a slow operating speed that supports cooler running and extended component life.
• AISI 316 stainless steel head, solid ceramic plungers, and oversized bearings make this pump suitable for continuous-duty use in food, beverage, chemical, marine, and pharmaceutical facilities.
• The 24 mm solid shaft format allows flexible integration with belt-drive systems, gearboxes, or direct-coupled electric motors in industrial wash skids and fixed plant installations.

Performance of RKSS21.15N and Operating Envelope

• Rated 5.5 GPM at 3000 PSI, the RKSS21.15N supports high-impact washdown, heavy rinsing, and surface prep in production areas, loading bays, and processing zones.
• 1450 RPM slow-speed operation generates the required duty point while reducing mechanical stress, vibration, and temperature rise inside the crankcase and head.
• The performance envelope is suited to single- or dual-gun systems using properly sized nozzles, hoses, and accessories in the 5–6 GPM class.
• When installed with correct inlet supply, unloader, and safety devices, the pump provides stable, predictable output over long operating cycles.

Flow, Pressure, and Process Compatibility

• 5.5 GPM supports large-area rinse-down of equipment, walls, floors, and structural steel where high turnover of fresh water is required for sanitation.
• 3000 PSI working pressure provides strong cutting power on baked-on residues, proteins, fats, pigments, and mineral deposits when paired with the correct nozzle and chemistry.
• Slow-speed operation helps maintain consistent output when system pressure varies due to nozzle changes, hose length, or elevation changes within the facility.
• The pump can be integrated into hot-water systems within the manufacturer’s temperature rating when matched with suitable seals, valves, and system safeguards.

RKSS21.15N Stainless Construction and Material Resistance

• AISI 316 stainless steel head is selected for high resistance to chlorides, caustics, cleaning chemicals, and washdown environments that rapidly attack brass or lower-grade alloys.
• Wetted components are configured to minimize crevices and stagnation points, supporting cleaning-in-place strategies and sanitary maintenance regimes where required.
• The stainless head and hardware tolerate frequent chemical changeover and routine foaming, rinsing, and disinfecting cycles common in regulated plants.
• This construction makes the pump well suited for long-term duty where corrosion, not mechanical wear, is typically the primary failure driver.

Ceramic Plungers, Valves, and Sealing

• Solid ceramic plungers provide a hard, dimensionally stable surface for seal packs, limiting wear under continuous high-pressure stroking and elevated temperatures.
• Stainless-steel valves are designed to seat cleanly under chemical and thermal cycling, maintaining volumetric efficiency and consistent pressure build.
• Seal and valve kits are available as service parts, allowing the hydraulic section to be rebuilt on a scheduled basis rather than replaced.
• Proper material pairing between plungers, seals, and valve components supports compatibility with a wide range of approved cleaning and sanitizing agents.

Drive, Mounting, and System Integration

• The RKSS21.15N has a 24 mm solid shaft is designed for use with belt-drive pulleys, gearboxes, or flexible couplers, giving engineers multiple options for matching speed and torque.
• 1450 RPM slow-speed design pairs well with 4-pole electric motors or belt reductions from common prime movers where lower pump speed is preferred.
• Mounting footprint and shaft height are suitable for installation on stainless skids, epoxy-coated frames, or overhead structures in washdown zones.
• The pump can be oriented and guarded to meet facility-specific safety and sanitation requirements, including splash zones and hose management layouts.

System Design and Fluid Handling Practices

• Best performance is achieved when the pump is supplied from a properly vented feed tank with adequate filtration and minimal inlet restriction.
• All upstream piping, valves, and strainers should be sized to support 5.5 GPM with low pressure drop to avoid cavitation and premature seal wear.
• Downstream components—unloader, relief valve, hoses, lances, and nozzles—must be rated for 3000 PSI or higher and compatible with the cleaning chemicals in use.
• Correct bypass routing and heat management are important in applications with extended trigger-off periods or automated valve cycling.

Service, Maintenance, and Operational Reliability

• The RKSS21.15N is supplied with pre-filled break-in oil, allowing installers to focus on alignment, mounting, and plumbing during commissioning.
• A vented dipstick and front-mounted oil sight glass simplify daily checks, giving operators clear visual confirmation of oil level and condition.
• Oversized bearings and robust crank components are chosen for long life under slow-speed, high-pressure operation when lubrication schedules are followed.
• Factory testing and documentation provide baseline performance data that can be used for commissioning records and maintenance planning.

RKSS21.15N Preventive Maintenance and Rebuild Strategy

• Routine tasks typically include checking for leaks, verifying oil level, inspecting drive alignment, and confirming stable operating pressure under load.
• Planned seal and valve kit replacements can be scheduled based on run hours, chemical exposure, and plant operating patterns to prevent unplanned downtime.
• All primary wear components—seals, valves, plungers, and bearings—are replaceable, supporting a full rebuild strategy over the life of the stainless head.
• When combined with proper records and inspection intervals, the pump can serve as a long-term asset in critical washdown or process-cleaning systems.

Applications for RKSS21.15N and Use Cases

• Food and beverage facility washdowns in USDA or comparable regulatory environments where stainless pumping components are required or strongly preferred.
• Chemical processing plant cleaning, including reactors, blending areas, loading racks, and spill zones exposed to aggressive media and fumes.
• Marine and offshore wash systems for docks, ship decks, platforms, and structures exposed to saltwater, spray, and corrosive atmospheres.
• Pharmaceutical and personal-care production equipment washdown where corrosion control and cleanability are essential for process integrity.
• Industrial cleaning skids and stationary wash stations used for paint preparation, degreasing, tank external cleaning, and structural maintenance.
• Any installation where conventional brass-head pumps show accelerated corrosion, and a stainless-head, slow-speed triplex pump is required for long service life.