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    Air amplifiers​Suitable for air, no need for electrical power supply

    • Official Hydraulics International (HII) distributors
    • Compressed air up to 1,250 psi (86.2 bar), no electrical power needed
    • Warranty up to 12 months
    • Price and availability within 24 hours
    5 models3A-SS-2.5, 3A-SS-4, 5A-DS-2, 5A-DS-5, 7A-DS-8
    2 to 8ratio given by the last digit of the model code
    1,250 psi (86.2 bar)max pressure of the amplification section, 5A-DS-5 and 7A-DS-8
    150 psi (10.3 bar)max drive air pressure, all models
    700 psi (48.3 bar)replacement of bottled nitrogen for testing, 5A-DS-5 and 7A-DS-8
    3.2–22.7 kgunit weight, 3A to 7A

    Prefer to talk to a technician? +39 0331 772410 · info@interfluid.net

    HII air amplifiers
    HII series 3A, 5A and 7APressure amplifiers for compressed air, driven by the plant air line.
    air amplifiers

    Price and availability within 24 hours

    Tell us the inlet pressure, the required pressure and the flow rate: a technician will reply within 24 working hours.

    Richiedi prezzo e disponibilità

    High pressure

    Applications 

    • Gas trasnsfer
    • Gas injection (foaming)
    • Tyre inflation
    • Pneumatic tools
    Logo HII
    logo HIP
    Official HII distributors
    Official HII distributors
    12 months warranty
    12 months warranty
    Disponibile certificazione CE e ATEX
    CE and ATEX certification available

    Air amplifiers description

    Pressure amplifiers, also known as pressure multipliers, convert compressed air into high pressure (up to 1,250 psi or 86 bar). The output pressure, controlled through a regulator, corresponds to the set air pressure multiplied by the multiplication ratio of the pressure intensifier.

    They operate on the same principle as gas boosters but with a significant difference. Air amplifiers do not have a distance piece between air motor and high-pressure gas section. Therefore they are not compatible for use with all gases.

    Once the pressure multiplier reaches the pre-set pressure it will automatically stall and maintain the pressure.

    They are mainly used to increase compressed air pressure and other inert and not dangerous gases.  It is essential in use with gases to have adequate ventilation in order not to saturate working environment in case of leak from multiplier due to wear of seals.

    Features

    • Maximum working pressure: 1,250 psi (86 bar)
    • Stainless steel high pressure gas section and check valves in contact with gas with exception of some models
    • Operate with compressed drive air (gas) from 116 psi (0.8 bar) to 145 psi (10 bar)
    • Stall pressure adjustable
    • Ideal for START/STOP applications under load

     

    Benefits

    •  Intrinsically safe no electrical feed required
    • Drive air lubrication is not required
    • Can replace a dedicated high pressure compressor
    • Outlet pressure is maintained without consuming any energy
    • Automatic restart in case of pressure drop downstream
    • Intrinsic safety. Also suitable for hazardous environments
    • Compact, lightweight, robust and weather proof
    • Easy to incorporate and use
    • Easy to incorporate automatic controls (PLC, proportional regulator)

    Air amplifier technical data

    HII pressure amplifiers for compressed air: two connections, plant air in and amplified air out. When demand stops the unit stalls, when demand resumes it restarts by itself. Values from the HII catalogue (AA500C).

    ModelRatio (last digit)Weight, kg (lb)Displacement per cycle, cm³ (in³)Max drive section pressure, psi (bar)Max amplification section pressure, psi (bar)
    3A-SS-2.52.53.2 (7)43.6 (2.66)150 (10.3)400 (27.6)
    3A-SS-443.2 (7)26.2 (1.60)150 (10.3)675 (46.6)
    5A-DS-2216.4 (36)3,323.3 (202.8)150 (10.3)300 (20.7)
    5A-DS-5513.6 (30)394.9 (24.1)150 (10.3)1,250 (86.2)
    7A-DS-8822.7 (50)678 (41.4)150 (10.3)1,250 (86.2)

    Theoretical stall pressure: inlet pressure multiplied by the last digit of the model code. Catalogue example: with air at 100 psi (6.9 bar) the 5A-DS-5 stalls at about 500 psi, the 5A-DS-2 at about 200 psi (13.8 bar). In practice the maximum pressure required is usually controlled with an external regulator. The 3A series is suited to low flow rates and intermittent duty, and fits OEM installations with a small tank. Flow curves are in the HII catalogue.

    HII standard systems

    CodeAmplifierDescriptionDimensions, mm
    HIS-100015A-DS-2Doubles the available plant air pressure, with high momentary flow. 15-gallon tank, 200 psi (13.8 bar) ASME, relief valve at 200 psi, outlet regulator.1016 × 432 × 660
    HIHP-10044 / HIHP-100453A-SS-2.5 / 3A-SS-4Compact system with pressure 2.5 or 4 times the plant air. Tank of about 1 gallon (D.O.T. steel cylinder), pilot air regulator, output up to 675 psi (46.6 bar).279 × 279 × 432
    HIS-100025A-DS-5Pressure up to 5 times the plant air, for pressure tests up to 500 psi (34.5 bar) at moderate flow. 5-gallon tank, 600 psi (41.4 bar) ASME, relief valve at 600 psi.432 × 381 × 584
    HIS-100035A-DS-2X + 5A-DS-5XDual 2-stage system for higher efficiency, flow and pressure, up to 390 psi (26.9 bar). 15-gallon tank, 400 psi (27.6 bar) ASME, PCV pilot valve, steel frame movable with a forklift and control panel.711 × 762 × 1092

    Recommended installation and controls

    • Amplify the air into a tank (ASME certified if fixed)
    • Fit a relief valve set at the tank maximum pressure
    • Use a pressure switch set at about 95% of the relief valve to stop the unit: it need not be electric, HII PCV valves do the same job without electrical power
    • Regulator on the tank outlet, at the lowest pressure useful for the application
    • Optional pilot air connection, for start-stop control with a PCV valve or a solenoid valve and pressure switch

    Typical applications from the catalogue

    • Valve actuators and air starters
    • Hopper vibrators and pneumatic drill motors
    • Pneumatic clamps, air brakes, air presses
    • Pneumatic nailers, staplers and strapping tools
    • Air/oil hoists
    • Off-road vehicle tyres
    • Replacement of bottled nitrogen for testing, up to 700 psi (48.3 bar), with 5A-DS-5 and 7A-DS-8

    Frequently asked questions

    What is the difference between the 3A series and the 5A and 7A series?

    The 3A series is compact (3.2 kg) and suited to low flow rates and intermittent duty, including OEM installations with a small tank. The 5A and 7A models weigh from 13.6 to 22.7 kg and reach 1,250 psi (86.2 bar) with the 5A-DS-5 and 7A-DS-8.

    What output pressure can I get?

    It depends on the model and on the inlet air, up to 150 psi (10.3 bar). The maximum pressure of the amplification section is 300 psi for the 5A-DS-2, 400 for the 3A-SS-2.5, 675 for the 3A-SS-4 and 1,250 for the 5A-DS-5 and 7A-DS-8. The theoretical stall pressure is the inlet pressure times the last digit of the model code.

    Is electrical power required?

    There are two connections: plant air in and amplified air out. For start-stop control, HII PCV valves do not need electrical power.

    Can it replace bottled nitrogen?

    The HII catalogue lists the 5A-DS-5 and 7A-DS-8 for replacing bottled nitrogen, up to 700 psi (48.3 bar), in air testing in the laboratory or in production.

    Are complete systems with a tank available?

    Yes: HIS-10001, HIHP-10044, HIHP-10045, HIS-10002 and HIS-10003, with tank, regulator and relief valve (HIS-10003 on a frame with a control panel).

    How soon do I receive price and availability?

    A technician will reply within 24 working hours.

    See also: HII electric gas boosters, all gas boosters and the hydrogen and technical gases sector.

    Can't find the model you need?Send us your plant air pressure, the required pressure and the flow rate: we will recommend the right HII amplifier.

    Request price and availability

    Choose the air amplifier you need and go directly to Fluid-Hub.net

    SeriesAverage stockDiscover online availability
    3A-SS✅ Usually available💬 Ask for availability
    5A-DS✅ Usually available💬 Ask for availability
    7A-DS🚚 Orderable from the supplier💬 Ask for availability

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