RKV35G40HD-F24 | 3.5 GPM 4000 PSI F24 Shaft Triplex Pump

Annovi Reverberi RKV35G40HD-F24 Triplex Pump | 3.5 GPM 4000 PSI 1-Inch Hollow Shaft

The RKV35G40HD-F24 is a heavy-duty commercial triplex plunger pump
delivering 3.5 GPM at 4,000 PSI at up to 3,400 RPM
— engineered for direct mounting to gasoline engines in the 7–18 HP range
via a 1-inch hollow shaft for fleet washing, surface preparation,
contractor pressure washer builds, industrial cleaning, and heavy-duty commercial
applications where consistent 4,000 PSI output and long continuous-duty service
life are both required. As part of the RKV heavy-duty series, the
RKV35G40HD-F24 features a nickel-plated forged brass manifold,
solid ceramic plungers, and precision-cast cooling fins that help regulate operating
temperature during extended runtime and warm-water operation — design elements that
keep the pump performing reliably in real-world working environments where
downtime is not an option.

Dual 1/2-inch female inlet ports and dual 3/8-inch female discharge ports provide
plumbing layout flexibility for diverse skid and cart configurations — making the
RKV35G40HD-F24 a practical choice for OEM system builders,
contractors assembling custom gas-engine pressure washer rigs, and operators
replacing pumps on existing direct-mount engine frames. At approximately 21 lbs
and rated to 140°F maximum fluid temperature, the RKV35G40HD-F24 balances
high-output commercial performance with a compact, integrator-friendly footprint.

RKV35G40HD-F24 Key Specifications

Performance, Drive & Construction

• Model: RKV35G40HD-F24
• Flow Rate: 3.5 GPM maximum — commercial-grade output
  for fleet washing, surface preparation, and contractor
  cleaning applications
• Maximum Pressure: 4,000 PSI — heavy-duty cutting
  pressure for concrete, equipment surfaces, building exteriors,
  and demanding commercial cleaning tasks
• Maximum Speed: 3,400 RPM — direct-drive operating
  speed matched to compatible 7–18 HP gas
  engine output
• Shaft Output: 1-inch hollow shaft — direct gas engine
  mounting without separate coupling hardware or
  adapter plates
• Compatible Engine Range: 7–18 HP gas engines —
  covers the most common contractor and commercial
  pressure washer engine configurations
• Inlet Ports: Dual 1/2-inch female — flexible
  plumbing layout for skid and cart system configurations
• Outlet Ports: Dual 3/8-inch female — flexible
  discharge routing for diverse system designs
• Manifold Material: Nickel-plated forged brass —
  superior corrosion resistance and pressure integrity versus
  plain brass or cast manifold alternatives
• Plungers: Solid ceramic triplex — abrasion and
  heat resistant for extended seal life in commercial
  duty cycles
• Cooling: Precision-cast cooling fins — dissipate
  heat from crankcase and manifold during extended runtime
  and warm-water operation
• Maximum Fluid Temperature: 140°F
• Weight: Approximately 21 lbs

How the RKV35G40HD-F24 Works

Triplex Plunger Design With Active Cooling for 4,000 PSI Reliability

The RKV35G40HD-F24 uses a three-plunger triplex configuration where
solid ceramic plungers operate in a synchronized reciprocating sequence — each
cylinder drawing water through stainless inlet valves on the retraction stroke and
discharging at rated 4,000 PSI pressure through stainless outlet valves on the
forward stroke. The overlapping three-cylinder cycle produces smooth, consistent
flow with substantially reduced pulsation compared to axial cam or wobble-plate
designs at equivalent pressure — protecting downstream hoses, guns, and accessories
from hydraulic fatigue while delivering a steadier, more controlled feel at
the lance.

The nickel-plated forged brass manifold is the most significant
construction upgrade in the RKV heavy-duty series — nickel plating adds a corrosion
and scale resistance layer over the forged brass base, providing meaningful
protection in mineral-rich water and chemical wash environments where plain brass
manifolds are vulnerable to accelerated scaling and surface degradation. Combined
with the solid ceramic plungers — which resist abrasion from water
particulates and transfer less heat into the packing stack than metal plunger
alternatives — the RKV35G40HD-F24’s wet-end construction is specifically chosen for
extended commercial service life at 4,000 PSI.

The precision-cast cooling fins are a practical thermal management
feature that distinguishes the RKV35G40HD-F24 from non-finned alternatives — by
increasing surface area on the crankcase and manifold, the fins accelerate heat
dissipation during long duty cycles and warm-water operation up to the rated 140°F
maximum fluid temperature, reducing the heat-induced seal and bearing degradation
that limits service life in pumps without active cooling features.

RKV35G40HD-F24 Key Benefits

Why the RKV Heavy-Duty Series Outperforms Standard Commercial Alternatives

• 4,000 PSI at 3.5 GPM for serious commercial output:
  the combination of high pressure and adequate flow covers the full range
  of fleet washing, surface preparation, contractor cleaning, and
  industrial washdown applications without sacrificing
  cutting force for flow or vice versa
• Nickel-plated forged brass — a meaningful upgrade:
  nickel plating over forged brass provides superior corrosion and scale
  resistance versus plain brass manifolds — the right specification for
  hard water, mineral-rich supply, and chemical wash
  environments that degrade lesser manifolds over time
• Precision-cast cooling fins actively manage heat:
  increased surface area dissipates crankcase and manifold heat during
  extended duty cycles — a feature that directly extends seal and
  bearing life compared to non-finned commercial
  pump alternatives
• 1-inch hollow shaft for true direct mounting:
  mounts directly onto compatible gas engine output shafts without
  separate coupling hardware — simpler installation, better alignment,
  and fewer mechanical interfaces to maintain versus
  shaft-coupling configurations
• 7–18 HP engine compatibility: covers the widest
  common gas engine range for commercial and contractor pressure
  washers — from compact 7 HP portable units to heavy 18 HP
  professional rigs in a single pump specification
• Dual inlet and outlet ports for system flexibility:
  two inlet and two outlet port options give OEM builders and
  contractors the plumbing routing freedom to design cleaner,
  more practical skid and cart layouts
• Compact 21-lb package for a 4,000 PSI pump:
  high output in a manageable weight — practical for portable
  contractor rigs and trailer-mounted systems where
  total system weight matters
• Ceramic plungers extend seal service intervals:
  lower heat transfer into the packing stack and superior abrasion
  resistance versus steel alternatives — directly reducing
  seal replacement frequency in heavy commercial use

RKV35G40HD-F24 Typical Applications

Where 3.5 GPM at 4,000 PSI on a 1-Inch Hollow Shaft Performs

• Fleet washing: trucks, trailers, buses, and heavy
  equipment where consistent 4,000 PSI output across long daily
  wash sessions demands the thermal stability and wear resistance
  that the RKV35G40HD-F24’s cooling fins and ceramic
  plungers provide
• Commercial pressure washing: sidewalks, parking
  areas, building facades, and construction equipment cleaning where
  3.5 GPM carry-off combined with 4,000 PSI mechanical action
  delivers efficient professional results per pass
• Surface preparation: concrete profiling, paint
  stripping, and pre-coating surface cleaning where 4,000 PSI impact
  at 3.5 GPM provides the mechanical force required for proper
  adhesion preparation without ultra-high-pressure
  equipment complexity
• Industrial cleaning: factories, warehouses,
  agricultural equipment, and general plant maintenance where a
  portable gas-engine pump delivers 4,000 PSI performance at
  locations without electrical supply infrastructure
• Heavy-duty residential and property work: large
  driveways, masonry surfaces, building exteriors, and pre-paint
  preparation where the RKV35G40HD-F24’s output handles demanding
  residential-scale jobs efficiently
• Custom gas-engine pressure washer builds: OEM
  skid builders and contractors assembling direct-mount systems
  benefit from the flexible dual-port layout, 7–18 HP engine
  compatibility range, and 4,000 PSI commercial-grade
  construction

RKV35G40HD-F24 Installation & Maintenance

Best Practices for Long Service Life at 4,000 PSI

• Match engine HP to operating requirements: pair
  with a compatible 7–18 HP gas engine to achieve optimal
  performance at rated 3.5 GPM and 4,000 PSI — an
  undersized engine cannot maintain pressure under full load;
  an oversized engine increases system cost without
  performance benefit
• Verify 1-inch hollow shaft fit before installation:
  confirm the engine output shaft is a true 1-inch diameter and
  check for correct axial depth engagement — insufficient shaft
  insertion creates stress concentrations at the
  hollow shaft interface
• Supply clean, filtered water: install an upstream
  inlet strainer to protect ceramic plungers and stainless valves
  from particulate contamination — the most cost-effective
  protection available for the RKV35G40HD-F24’s
  wet-end components
• Do not exceed 140°F maximum fluid temperature:
  warm-water operation within the rated limit is acceptable and the
  cooling fins assist thermal management — operating above 140°F
  accelerates seal degradation and is not covered
  under warranty
• Never exceed 3,400 RPM operating speed: overspeeding
  beyond the rated maximum accelerates wear on all internal
  components and creates pressure spikes above the
  4,000 PSI design rating
• Pair with a correctly rated unloader valve: size
  the unloader for 4,000 PSI and 3.5 GPM — an incorrectly adjusted
  unloader creates pressure spikes that damage packings and
  reduce pump service life
• Check crankcase oil before each use: maintain
  proper oil level for crankcase bearing lubrication — inadequate
  oil is the most common cause of preventable
  bearing failure
• Never run dry: always confirm water supply is
  connected before starting the engine — even brief dry operation
  damages ceramic plunger packings
• First oil change at approximately 50 hours: then
  follow duty-cycle-based intervals — inspect seals, fittings, and
  ports regularly for early signs of wear
• Winterize before storage: drain completely or use
  pump-safe antifreeze — freeze damage to the manifold voids
  warranty coverage

Why Choose the RKV35G40HD-F24

Heavy-Duty Series Construction for 4,000 PSI Commercial Gas Engine Systems

• RKV heavy-duty series — built for the conditions standard
  pumps avoid: nickel-plated forged brass, precision-cast
  cooling fins, and ceramic plungers are heavy-duty series
  specifications, not entry-level commercial features — the
  RKV35G40HD-F24 is built for the applications where
  lesser pumps wear out prematurely
• Nickel-plated manifold for hard water and chemical
  environments: the nickel plating is specifically valuable
  for contractors working with mineral-rich supply water and chemical
  detergents that accelerate plain brass manifold degradation
  over a working season
• Cooling fins matter in real-world commercial use:
  contractors running long shifts in warm weather with warm water
  will see measurably better thermal stability and longer seal
  service life from the RKV35G40HD-F24 versus
  non-finned alternatives at equivalent output
• Widest gas engine compatibility in the class:
  7–18 HP hollow shaft compatibility with true direct-mount
  installation covers more engine platforms than competing
  commercial replacement pumps in this
  pressure and flow class
• Dual ports for cleaner system design: two inlet
  and two outlet options give builders practical routing choices
  that simplify plumbing layout on skids, carts,
  and trailer rigs
• Backed by WSHPWR: expert application support,
  engine compatibility guidance, and full parts availability
  for the RKV35G40HD-F24 and the complete
  Annovi Reverberi RKV pump family

The RKV35G40HD-F24 delivers 3.5 GPM at 4,000 PSI
at up to 3,400 RPM through a 1-inch hollow shaft direct-mount
design compatible with 7–18 HP gas engines — a heavy-duty commercial triplex
pump built with nickel-plated forged brass, precision-cast cooling fins, and ceramic
plungers for fleet washing, surface preparation, contractor rigs, and industrial
cleaning where 4,000 PSI output reliability and thermal stability across long
duty cycles are both required. Contact WSHPWR for current pricing, availability,
engine compatibility confirmation, and application support.