RKA4G40HN 4.0 GPM 4000 PSI | 1750 RPM Industrial Pump

Annovi Reverberi RKA4G40HN Industrial Triplex Pump | 4.0 GPM 4000 PSI 16000 ECU

The Annovi Reverberi RKA4G40HN is an industrial-grade triplex
ceramic plunger pump delivering 4.0 GPM at 4,000 PSI at a
controlled 1,750 RPM — engineered for construction and industrial
cleaning, fleet and municipal service fleets, agricultural equipment, concrete
surface restoration, and food and manufacturing plant washdown systems where maximum
cleaning power and long continuous-duty service life are both required. With a
16,000 Effective Cleaning Unit (ECU) rating, the
RKA4G40HN delivers the combined pressure and flow efficiency that
defines industrial-grade cleaning performance — backed by a heavy-duty brass
manifold, precision ceramic plungers, stainless steel valves, and a
5-year manufacturer warranty with nationwide service support.

At 1,750 RPM, the RKA4G40HN operates at the low-speed design point that sets
industrial-grade triplex pumps apart from high-speed commercial alternatives at
equivalent output — reduced operating speed directly lowers heat generation at
the ceramic plunger and packing interface, minimizes bearing surface velocity under
sustained 4,000 PSI load, and slows the fatigue cycling rate on stainless valve
seats and springs. For contractors, municipalities, and industrial operators running
the RKA4G40HN across demanding daily schedules, this translates
into longer seal service intervals, more predictable valve wear, and sustained
4,000 PSI output quality that high-speed pump designs cannot maintain across
comparable continuous-duty operating hours.

RKA4G40HN Key Specifications

Performance, Construction & ECU Rating

• Model: Annovi Reverberi RKA4G40HN
• Flow Rate: 4.0 GPM — industrial-grade output for
  fleet washing, municipal service bays, construction equipment,
  and agricultural machinery cleaning
• Maximum Pressure: 4,000 PSI — serious cutting
  pressure for heavy soils, concrete surfaces, industrial residues,
  and challenging commercial cleaning tasks
• ECU Rating: 16,000 Effective Cleaning Units —
  the combined pressure and flow efficiency metric that quantifies
  the RKA4G40HN’s industrial cleaning performance
• Operating Speed: 1,750 RPM — slow-speed design
  for reduced heat, lower component wear, and extended
  continuous-duty service life
• Pump Type: Industrial-grade triplex ceramic
  plunger — three-cylinder balanced design for smooth,
  consistent low-pulsation output at rated 4,000 PSI
• Manifold: Heavy-duty brass — corrosion-resistant
  strength for long-term service under continuous industrial
  pressure and chemical exposure
• Plungers: Precision ceramic — reduced wear,
  cooler operation, and extended seal life in continuous
  high-pressure duty cycles
• Valves: Stainless steel — reliable performance
  and corrosion resistance under continuous-duty
  4,000 PSI operation
• Oil Management: Oil sight glass and vented
  dipstick for fast daily level checks and
  crankcase pressure control
• Note: Mounting bolts not included
• Warranty: 5-year manufacturer warranty with
  nationwide service center support

What’s Included with the RKA4G40HN

Factory-Ready for Immediate Industrial System Installation

• Factory-tested pump assembly — every RKA4G40HN
  is pressure-verified for flow, pressure, and seal integrity
  before shipment
• Pre-filled break-in oil — factory-installed
  for immediate startup without sourcing initial
  oil fill separately
• Oil sight glass — quick visual crankcase oil
  level check before each operating shift without
  tools or disassembly
• Vented dipstick — crankcase pressure control
  and secondary oil level verification for complete
  daily maintenance checks
• Operator’s manual and detailed parts schematic —
  installation reference, maintenance procedures, and parts
  identification for the life of the pump
• 5-year manufacturer warranty documentation —
  with nationwide service center coverage;
  mounting bolts not included

How the RKA4G40HN Delivers 4,000 PSI Industrial Performance

Triplex Plunger Design at 1,750 RPM for Continuous Industrial Duty

The RKA4G40HN uses a triplex plunger system where three precision
ceramic plungers operate in synchronized reciprocation — each cylinder drawing
water through stainless steel inlet valves and discharging at rated 4,000 PSI
through stainless discharge valves in a balanced, overlapping three-cylinder cycle.
This configuration minimizes pulsation and produces a steady, consistent spray
stream essential for professional industrial cleaning tasks — protecting downstream
hoses, unloaders, and spray guns from the hydraulic fatigue that high-pulsation
pump designs create across long operating shifts.

At 1,750 RPM, the RKA4G40HN’s ceramic plungers, valve seats, and
bearing surfaces cycle at a controlled rate that maintains stable internal operating
temperatures and keeps mechanical stress well below the fatigue threshold that
high-speed pump designs encounter at equivalent 4,000 PSI output levels. The
brass manifold withstands sustained pressure stress and chemical
exposure across industrial cleaning environments — corrosion-resistant construction
that maintains sealing integrity and manifold dimensional stability over extended
continuous-duty service.

The 16,000 ECU rating is the most meaningful single-number
performance indicator for cleaning efficiency — calculated as flow rate multiplied
by pressure (4.0 GPM × 4,000 PSI = 16,000), the ECU figure quantifies the combined
cleaning energy the RKA4G40HN delivers per unit time. At 16,000 ECU, the RKA4G40HN
sits firmly in the industrial-grade cleaning class — above the mid-pressure
commercial pumps that cannot generate sufficient mechanical impact for heavy
industrial soils, and below the ultra-high-pressure specialty equipment required
only for hydrodemolition and extreme coating removal. For contractors,
municipalities, and industrial operators, 16,000 ECU represents the practical
sweet spot where maximum cleaning productivity and system cost-efficiency
intersect.

RKA4G40HN Key Benefits

Why Industrial and Municipal Operators Choose the RKA4G40HN

• 16,000 ECU — industrial-grade cleaning efficiency:
  the combined 4.0 GPM flow and 4,000 PSI pressure deliver fast,
  effective removal of heavy soils, industrial grease, concrete
  residue, and equipment deposits that lower-ECU systems
  require significantly more time and passes
  to address
• 4,000 PSI for serious industrial cutting power:
  effective mechanical action on construction equipment, fleet
  vehicles, concrete surfaces, agricultural machinery, and
  municipal service equipment where mid-pressure systems
  leave heavy soils behind
• 1,750 RPM slow-speed design for maximum service life:
  the low-speed operating point that defines industrial-grade
  pump longevity — less heat, less seal cycling, less valve
  fatigue, and lower bearing load per operating hour versus
  high-speed commercial alternatives
  at equivalent output
• Precision ceramic plungers extend packing life:
  ceramic’s hardness and low thermal conductivity limit heat
  transfer into the packing stack at 4,000 PSI — directly
  reducing seal replacement frequency in demanding continuous
  industrial and municipal duty cycles
• Heavy-duty brass manifold for industrial environments:
  corrosion-resistant construction that withstands the sustained
  pressure loads and chemical exposure of industrial cleaning
  applications where manifold integrity
  is a long-term reliability factor
• Stainless valves for continuous-duty reliability:
  precision-seated stainless steel maintains consistent sealing
  performance across variable demand conditions and long
  hose run configurations at 4,000 PSI — protecting
  volumetric efficiency over the RKA4G40HN’s
  service life
• Factory-tested before every shipment:
  performance-verified flow and pressure output confirmed
  before the RKA4G40HN leaves the production facility —
  no performance uncertainty at installation for
  system builders and commercial operators
• 5-year warranty — industry-leading coverage:
  most competing industrial-grade 4,000 PSI triplex pumps
  carry 1–2 year warranties — the RKA4G40HN’s 5-year
  coverage reflects Annovi Reverberi’s confidence in the
  platform’s continuous-duty durability

RKA4G40HN Typical Applications

Where 4.0 GPM at 4,000 PSI and 16,000 ECU Deliver Industrial Results

• Construction and industrial cleaning: heavy
  machinery, construction tools, and job site equipment where
  4,000 PSI mechanical action combined with 4.0 GPM carry-off
  removes compacted soils and heavy industrial residues
  efficiently per pass
• Fleet and vehicle washing: trucks, buses,
  tractors, and municipal service fleets where consistent
  4,000 PSI output across long daily wash schedules demands
  the thermal stability and service life that the RKA4G40HN’s
  1,750 RPM design provides
• Concrete and surface restoration: driveways,
  sidewalks, parking lots, and industrial flooring where
  4,000 PSI impact energy removes embedded soils and
  prepares surfaces for coatings efficiently
• Municipal service bays: street equipment,
  sanitation trucks, and public works vehicles where the
  RKA4G40HN’s 16,000 ECU rating and continuous-duty
  reliability support the operational uptime requirements
  of municipal fleet maintenance schedules
• Agricultural equipment cleaning: tractors,
  plows, and farm machinery where 4,000 PSI removes compacted
  field soils and agricultural residues effectively across
  seasonal high-intensity cleaning cycles
• Food and manufacturing plant washdown:
  production equipment and facility maintenance where
  consistent 4,000 PSI output supports thorough cleaning
  results — verify chemical compatibility and
  facility SOPs for all applied
  cleaning agents

RKA4G40HN Installation & Maintenance

Best Practices for Long Service Life at 4,000 PSI

• Source mounting bolts before installation:
  mounting bolts are not included with the RKA4G40HN —
  confirm correct bolt specification for your mounting
  configuration before beginning installation
• Mount on a rigid, vibration-resistant surface:
  stable structural mounting minimizes transmitted vibration
  into the pump crankcase and manifold — critical for
  skid-mounted and trailer-mounted
  industrial system installations
• Feed clean, filtered water from adequate supply:
  install an upstream inlet strainer to protect ceramic plungers,
  stainless valves, and packing from particulate contamination —
  essential protection for sustained
  4,000 PSI operation
• Pair with a correctly rated unloader valve:
  size the unloader for 4,000 PSI and 4.0 GPM — an incorrectly
  adjusted unloader creates pressure spikes that damage
  pump packings and reduce component
  service life
• Check oil before every shift: verify crankcase
  oil level via sight glass and confirm with the dipstick —
  adequate oil is the most critical factor in bearing longevity
  at 4,000 PSI continuous-duty
  operation
• Never run dry: always confirm water supply is
  connected and flowing before starting — dry operation at
  4,000 PSI damages ceramic plunger packings immediately
  and voids warranty coverage
• First oil change at approximately 50 hours:
  then follow Annovi Reverberi’s duty-cycle-based maintenance
  schedule — industrial continuous-duty applications at
  4,000 PSI require more frequent oil service than
  intermittent commercial use
• Flush after chemical applications: run clean
  water through the RKA4G40HN after every detergent or chemical
  use to protect brass manifold passages and
  stainless valve seats from
  residue buildup
• Winterize before cold storage: drain completely
  or use pump-safe antifreeze — freeze damage to the manifold
  or plunger bores is not covered
  under warranty

Why Choose the Annovi Reverberi RKA4G40HN

16,000 ECU Industrial Performance Backed by 5-Year Warranty Coverage

• 16,000 ECU at the industrial sweet spot:
  4.0 GPM and 4,000 PSI combine to deliver the cleaning
  efficiency that covers the full range of industrial,
  municipal, and agricultural cleaning demands without
  the cost or complexity of ultra-high-pressure
  specialty equipment
• Slow-speed engineering for industrial reliability:
  the RKA4G40HN is not a high-speed commercial pump pressed
  into industrial service — it is an industrial-grade platform
  engineered specifically to operate at 4,000 PSI continuously
  at 1,750 RPM with the thermal and mechanical stability
  that demanding schedules require
• Annovi Reverberi quality since 1958: over 60
  years of commercial and industrial pump engineering trusted
  by contractors, municipalities, and industrial operators
  globally — every RKA4G40HN factory-tested to verified
  specifications before shipment
• 5-year warranty on an industrial 4,000 PSI platform:
  exceptional coverage that reflects the RKA4G40HN’s engineered
  durability — backed by the global Annovi Reverberi service
  network and U.S.-based nationwide support centers
• Mounting bolts not included — confirm specification
  before ordering: verify correct mounting bolt
  specification for your system configuration to avoid
  installation delays
• Backed by WSHPWR: expert application support,
  system integration guidance, mounting bolt specification
  assistance, and full parts availability for the RKA4G40HN
  and the complete Annovi Reverberi
  RKA pump family

The Annovi Reverberi RKA4G40HN delivers 4.0 GPM at
4,000 PSI at a controlled 1,750 RPM with a
16,000 ECU industrial cleaning rating — a heavy-duty triplex
ceramic plunger pump engineered for construction cleaning, fleet washing, municipal
service bays, agricultural equipment, and industrial washdown systems where
sustained 4,000 PSI output, slow-speed thermal stability, and 5-year warranty
coverage are all required. Contact WSHPWR for current pricing, availability,
mounting bolt specifications, and application support.