SHP1550HN | 4 GPM 7250 PSI Pump 1450 RPM SHP Series Duty

Annovi Reverberi SHP1550HN Industrial Pump | 3.96 GPM 7250 PSI 24mm Shaft Nickel-Plated

SHP1550HN — the Annovi Reverberi SHP Series 194 super
high-pressure industrial triplex plunger pump delivering
3.96 GPM at 7,250 PSI at a controlled 1,450 RPM
on a 24mm solid keyed shaft — engineered for hydrostatic
pressure testing of pipelines, vessels, hoses, and valves; industrial surface
preparation and coating removal; abrasive and water-blasting system supply;
marine hull cleaning and shipyard maintenance; power generation heat exchanger
and boiler descaling; and municipal bridge and infrastructure rehabilitation
where 7,250 PSI ultra-high-pressure output exceeds the capability of standard
industrial pump platforms and the application demands a purpose-built
super high-pressure architecture. The SHP1550HN is the
nickel-plated head and valve cap variant — the “HN” designation confirming
nickel-plated brass construction on both the manifold head and valve caps for
enhanced corrosion resistance, chemical attack protection, and long-term service
life in the marine, industrial, and chemical environments where 7,250 PSI
ultra-high-pressure systems operate. Backed by a 5-year commercial
warranty with AR North America’s nationwide U.S.-based service centers
and domestic WSHPWR fulfillment.

SHP1550HN Key Specifications

Performance, Drive & Ultra-High-Pressure Construction — Confirmed AR Catalog

• Model: Annovi Reverberi SHP1550HN
• Series: SHP Series 194 — Super High-Pressure
  industrial platform; purpose-built for
  ultra-high-pressure applications exceeding
  standard industrial pump
  pressure limits
• Flow Rate: 3.96 GPM (15 L/min)
• Maximum Pressure: 7,250 PSI (500 Bar) —
  ultra-high-pressure output for hydrostatic
  testing, coating removal, descaling, and
  industrial blasting support
• EBHP: 20 — requires 20 HP or greater
  engine or motor at 1,450 RPM for rated
  7,250 PSI output
• Operating Speed: 1,450 RPM — low-speed
  design for reduced vibration, controlled heat,
  and extended bearing and seal life at
  ultra-high-pressure
  continuous-duty loads
• Bore: 18 mm | Stroke: 15 mm |
  CSID Stamp: 8
• Shaft: 24mm solid keyed — N version;
  compatible with belt-drive, gear-drive, and
  engine-coupled configurations rated for
  20 HP+ at 1,450 RPM
• Pump Type: Reinforced triplex plunger —
  three-cylinder architecture engineered
  specifically for ultra-high-pressure
  continuous-duty service
• Manifold Head: Nickel-plated brass —
  “HN” designation; enhanced corrosion resistance
  and chemical attack protection versus standard
  brass in marine, industrial, and
  chemical environments
• Valve Caps: Nickel-plated brass —
  “HN” designation applied to both head
  and valve caps for complete
  wet-end protection
• Plungers: Solid ceramic — precision-ground
  for dimensional stability under extreme
  pressure and heat loading at
  7,250 PSI continuous duty
• Valves: High-strength stainless steel —
  engineered for rapid cycling at ultra-high
  pressures without deformation
  or leakage
• Crankcase: Die-cast aluminum — heavy-duty
  reinforced design with oversized crankshaft
  bearings, oil-bath lubrication, and
  rigidity for alignment stability
  at high load
• Bearings: Oversized — sustained support
  under prolonged high-load operation
  at 1,450 RPM and
  7,250 PSI
• Inlet: 1/2-inch female |
  Discharge: 3/8-inch female
• Oil Capacity: approximately 15 oz
• Duty Rating: Continuous-duty
  industrial service
• Warranty: 5-year commercial warranty —
  U.S.-based AR service centers and
  domestic WSHPWR fulfillment

What the HN Designation Means

Nickel-Plated Head and Valve Caps — SHP1550HN vs. SHP1550N

The SHP1550HN and the SHP1550N are the same SHP Series 194
ultra-high-pressure platform at identical 3.96 GPM / 7,250 PSI / 1,450 RPM
specifications. The “HN” suffix designates nickel-plated brass
construction on both the manifold head and valve caps — a meaningful
specification distinction for the environments where SHP-class pumps are most
frequently deployed.

Nickel plating on the brass head and valve cap surfaces provides a harder,
denser barrier against chloride attack, caustic chemical exposure, and the
moisture-saturated operating environments of marine shipyards, coastal
industrial facilities, and chemical processing plants. Where the standard
SHP1550N brass surfaces are adequate for general industrial service, the
SHP1550HN’s nickel-plated construction is the correct
specification when the operating environment involves salt spray, seawater
exposure, aggressive industrial chemicals, or sustained high-humidity conditions
that would accelerate brass surface degradation over a long service life
at 7,250 PSI.

For system builders specifying a super high-pressure pump for marine,
shipyard, coastal, or chemically aggressive industrial environments, the
SHP1550HN nickel-plated specification eliminates the manifold surface
corrosion that would otherwise require early replacement of a pump
that is otherwise performing at full rated pressure.

What’s Included with the SHP1550HN

Factory-Provisioned for Immediate Industrial System Integration

Every SHP1550HN ships with factory-filled break-in oil for
immediate installation and commissioning, an integrated oil sight
glass for fast crankcase level inspection without disassembly, a
vented dipstick for crankcase pressure regulation and oil
level access, a complete owner’s manual and parts schematic
for maintenance and repair reference, and factory performance testing
documentation verifying rated flow and pressure output before
shipment — backed by the 5-year commercial warranty with
U.S.-based AR service center support and domestic WSHPWR fulfillment.

SHP Series 194 Architecture — Built for 7,250 PSI

Why Ultra-High-Pressure Demands a Dedicated Platform

The SHP1550HN is not an uprated version of a standard
industrial triplex pump — it is a purpose-built platform designed from the
ground up for sustained 7,250 PSI output in a way that standard industrial
pump architectures cannot achieve without failure.

At 7,250 PSI — more than double the pressure of a typical 3,000 PSI
commercial pump — every load-bearing component in the drivetrain and wet end
operates under conditions that require specific engineering responses. The
reinforced triplex plunger architecture uses heavier crankcase
castings with greater wall thickness and structural rigidity than standard
industrial triplex designs to resist the deflection and vibration that 7,250 PSI
cyclic loads generate across thousands of operating hours. The
precision-ground ceramic plungers maintain dimensional stability
under the extreme heat and pressure loading at each stroke — ceramic’s hardness
and thermal stability being specifically required at this pressure class where
softer plunger materials would score and fail prematurely. The
high-strength stainless steel valves are engineered for rapid
cycling at ultra-high pressure without the deformation that standard valve
materials experience at 7,250 PSI over extended duty cycles.

At 1,450 RPM, the SHP1550HN generates each 7,250 PSI stroke
at a controlled rate that manages vibration transmission, heat accumulation at
the packing seals, and bearing surface velocity — all three of which would be
significantly more destructive at the 3,400 RPM speeds of standard gas
engine-driven pressure washer pumps at this pressure class. The low-speed
design is not a concession on output — it is the engineering requirement for
continuous-duty ultra-high-pressure service life.

SHP1550HN Drive and System Integration

20 HP+ Requirement and 24mm Shaft Compatibility

The SHP1550HN’s 20 EBHP requirement at 3.96 GPM and 7,250 PSI
places it firmly in the large engine and industrial motor class — this is not
a pump for a 13 HP gas engine or a standard NEMA 56-C electric motor frame.
System builders specifying the SHP1550HN should plan for a 20–25 HP gas engine,
diesel engine, or industrial electric motor with appropriate gear reduction or
belt-drive system to deliver 1,450 RPM at the pump’s 24mm solid keyed shaft
under full 7,250 PSI operating load.

The 24mm solid keyed shaft supports belt-drive sheaves,
gear-drive couplings, and direct coupling arrangements — the same shaft
interface used across the AR industrial pump lineup for maximum compatibility
with heavy-duty drive system configurations in skid, trailer-mounted, and
fixed industrial installations.

All downstream system components — hoses, fittings, unloaders, safety relief
valves, and spray or blasting accessories — must be rated for a minimum of
7,250 PSI service. Standard commercial pressure washer components rated to
3,000–4,000 PSI are not acceptable in SHP1550HN system configurations and
create serious safety risk at ultra-high-pressure operating conditions.

SHP1550HN Key Benefits

7,250 PSI Capability, Nickel-Plated Protection, and Low-Speed Industrial Reliability

• 7,250 PSI — the pressure class that
  changes what is possible: hydrostatic
  testing to rated system pressure, aggressive
  coating removal in single passes, heat exchanger
  descaling, and concrete rehabilitation that
  standard 3,000–4,000 PSI pumps cannot
  approach in performance
  or efficiency
• Nickel-plated HN specification for
  corrosive environments: the correct
  manifold head and valve cap specification
  for marine, coastal, shipyard, and chemically
  aggressive industrial environments where
  standard brass surfaces degrade under
  sustained exposure
• Purpose-built SHP Series 194
  architecture: not an uprated standard
  pump — a dedicated ultra-high-pressure platform
  with reinforced crankcase, precision ceramic
  plungers, and high-strength stainless valves
  engineered specifically for
  7,250 PSI continuous duty
• 1,450 RPM low-speed for ultra-high-pressure
  longevity: controlled vibration, managed
  heat accumulation, and reduced packing fatigue
  at 7,250 PSI — the operating speed that makes
  continuous-duty service life
  achievable
• Smooth triplex output for system
  and accessory protection: evenly phased
  pressure pulses protect high-pressure hose
  assemblies, fittings, and blasting accessories
  from the shock loads that high-pulsation
  ultra-high-pressure systems
  generate
• Factory performance verification at
  7,250 PSI: every SHP1550HN output
  confirmed to rated flow and pressure before
  shipment — critical for system builders
  specifying a pump for hydrostatic testing
  and safety-rated
  applications
• 5-year warranty on ultra-high-pressure
  industrial platform: exceptional coverage
  for a super high-pressure pump — backed by
  U.S.-based AR service centers and
  WSHPWR’s domestic fulfillment

SHP1550HN Typical Applications

Where 3.96 GPM at 7,250 PSI Delivers Industrial Results

• Hydrostatic pressure testing: pipelines,
  pressure vessels, hoses, valves, and industrial
  components where the SHP1550HN’s 7,250 PSI
  maximum and factory-verified output provide
  the traceable pressure confirmation that
  safety-rated testing
  requires
• Industrial surface preparation: removal
  of coatings, rust, mill scale, and surface
  contaminants prior to repainting, lining
  installation, or structural repair where
  7,250 PSI mechanical action achieves
  near-white metal surface profiles
  that lower-pressure systems
  cannot reach
• Abrasive and water-blasting system
  supply: high-pressure water supply for
  abrasive injection and pure waterjet blasting
  systems where 7,250 PSI and 3.96 GPM provide
  the hydraulic energy required for
  effective media acceleration
• Marine hull cleaning and shipyard
  maintenance: the SHP1550HN’s nickel-plated
  HN specification makes it the correct pump
  for saltwater and marine chemical environments
  — hull fouling removal, coating preparation,
  and corrosion control where 7,250 PSI
  delivers single-pass
  effectiveness
• Power generation and refinery
  descaling: heat exchangers, boilers,
  condensers, and heavy industrial process
  equipment where scale deposits require
  7,250 PSI hydraulic force for
  effective removal without
  chemical treatment
• Municipal and infrastructure
  rehabilitation: bridge maintenance,
  concrete surface preparation, roadway
  rehabilitation, and structural repair
  where 7,250 PSI delivers the concrete
  surface cleanliness and profile
  required for coating system
  adhesion

SHP1550HN Installation & Safety

Critical Requirements for 7,250 PSI Ultra-High-Pressure System Integration

• All system components must be rated
  for 7,250 PSI minimum: hoses, fittings,
  unloaders, safety relief valves, and
  blasting accessories rated below 7,250 PSI
  are not acceptable — component failure
  at ultra-high pressure presents
  serious safety risk
• Size drive system for 20 EBHP at
  1,450 RPM: specify 20–25 HP engine or
  motor with appropriate speed reduction to
  deliver 1,450 RPM at the 24mm shaft under
  full 7,250 PSI operating load —
  undersized power causes speed drop
  and output loss
• Install safety relief valve rated
  for 7,250 PSI: mandatory for every
  SHP1550HN system installation; unloaders
  and bypass circuits must also be rated
  for full system pressure
• Size inlet plumbing for 3.96 GPM
  with adequate NPSH margin: inlet
  restriction cavitation at ultra-high
  pressure accelerates plunger and packing
  damage at a rate far exceeding
  standard pressure systems
• Operator personal protective
  equipment required: ultra-high-pressure
  water streams at 7,250 PSI cause severe
  injection injuries — appropriate PPE,
  safe standoff distances, and trained
  operators are mandatory for all
  SHP1550HN system operation
• Monitor oil sight glass before
  every shift: at 7,250 PSI and 20 EBHP
  load, adequate crankcase oil is more
  critical than at standard pressure —
  oil condition and level directly
  determine bearing and
  plunger longevity
• First oil change at 50 hours:
  then per AR industrial duty-cycle schedule;
  flush with clean water after every
  chemical or descaling
  application
• Winterize before cold storage:
  drain completely or use appropriate
  antifreeze — freeze damage to the
  nickel-plated brass manifold
  voids warranty

Why Choose the Annovi Reverberi SHP1550HN

Purpose-Built 7,250 PSI Nickel-Plated Industrial Platform

The SHP1550HN is the correct specification when the application
genuinely requires 7,250 PSI — hydrostatic testing, industrial coating removal,
marine hull preparation, and heat exchanger descaling are not applications where
a lower-pressure pump can be substituted without compromising results. The
nickel-plated HN specification adds the corrosion protection that marine, coastal,
and chemical industrial environments demand. The SHP Series 194 architecture
delivers the reinforced crankcase, precision ceramic plungers, high-strength
stainless valves, and 1,450 RPM low-speed design that continuous-duty 7,250 PSI
operation requires — backed by over 60 years of Annovi Reverberi industrial pump
manufacturing since 1958, a 5-year commercial warranty, and AR North America’s
nationwide U.S. service infrastructure. Contact WSHPWR for current pricing,
availability, drive system specification guidance, and 7,250 PSI system
component rating support.