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Air Driven Pumps and Boosters
Comparison of Pneumatics to Hydraulics

Both pneumatics and hydraulics are applications of fluid power. Pneumatics uses an easily compressible gas such as air or a suitable pure gas—while hydraulics uses relatively incompressible liquid media such as oil. Most industrial pneumatic applications use pressures of about 80 to 100 pounds per square inch (550 to 690 kPa). Hydraulics applications commonly use from 1,000 to 5,000 psi (6.9 to 34.5 MPa), but specialized applications may exceed 10,000 psi (69 MPa).[citation needed].

Advantages of pneumatics
  • Simplicity of design and control—Machines are easily designed using standard cylinders and other components, and operate via simple on-off control.
  • Reliability—Pneumatic systems generally have long operating lives and require little maintenance. Because gas is compressible, equipment is less subject to shock damage. Gas absorbs excessive force, whereas fluid in hydraulics directly transfers force. Compressed gas can be stored, so machines still run for a while if electrical power is lost.
  • Safety—There is a very low chance of fire compared to hydraulic oil. Newer machines are usually overload safe.
Advantages of hydraulics
  • Liquid does not absorb any of the supplied energy.
  • Capable of moving much higher loads and providing much higher forces due to the incompressibility.
  • The hydraulic working fluid is basically incompressible, leading to a minimum of spring action. When hydraulic fluid flow is stopped, the slightest motion of the load releases the pressure on the load; there is no need to "bleed off" pressurized air to release the pressure on the load.
  • Highly responsive compared to pneumatics.
  • Supply more power than pneumatics.
  • Can also do many purposes at one time: lubrication, cooling and power transmission.

Leading with Quality, Performance and Cost
Our partners, the HYDRAULICS INTERNATIONA(HII), is one top Professional Hydraulic Pneumatic Conjugations and Integrations equipment manufacturer and integrated solution supplier.
HII has over 30 years history of cutting edge support equipment ingenuity and new product technology innovation in three main business units:

  • Defense/Aviation/Commercial Ground and Engineering Support Equipment Systems.
  • Gas and Liquid Extraction Pumps/Pneumatic driven liquid pump/Gas booster/Amplifier systems.
  • Flow metering/analyzing/totalizing systems.

HII is one of the few companies having total self sufficiency in design and manufacture of the systems and components required for its’ business units. Ongoing research and development in all areas has improved operation, quality, and functionality of the business unit products and systems.

Compressed Gas and Liquid Extraction Pumps & Boosters
Designed for subcritical and supercritical BOTANICAL OIL extraction utilizing gases and liquids such as :
CO2, Ethyl Alcohol, Ethanol, Propane,
Butane / Iso-butane, Dimethyl Ether, R134a and other refrigerant gases.

Pharmaceutical Industrial Extraction of Herbal Medicines
Refining of pharmaceuticals
Food Industry Coffee, tea, hops, herbs & spices, flavors, antioxidants
Extraction of special oils
  De-oiling of pressed cakes
Cleaning of rice
Cosmetic Industry Active ingredients for cosmeceutical applications
Other applications Cleaning of corks
Impregnation of wood

Low-Pressure, High Flow, Oil Free
These units are designed for subcritical and supercritical Botanical Oil extraction using Butane & Propane. It consists of a large area double acting drive piston directly connected, through a high pressure seal and bearings, to a double acting or 2-stage boost piston. The drive section includes a spool type directional control valve and poppet type pilot valves to allow automatically reciprocate when compressed air (or a suitable gas) is applied to the drive port. Drive exhaust is routed to a muffler which is positioned near the finned gas section to enhance cooling.

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Air Driven Liquid Pumps
Why use Air Driven Liquid Pumps
Hydraulic pressure is held without energy consumption.
• Explosion proof ... requires no electrical power or connections.
• Intrinsically safe.
• Compact, lightweight and weatherproof.
• Easy to adapt automatic controls.
• Contamination tolerant.
• Outlet stall pressure pre-determined by the air drive regulator.
• High pressure capability - up to 80,000 psi.
• Ideal for stop-start applications under full load.
• Easy to install and operate.

Typical applications
• Hydrostatic testing
• Clamping-Pressing-Releasing
• Valve actuation
• Portable hydraulic tools


Air Driven Boosters
• Separation between drive and gas section uses three dynamic seals with dual vents.
• Air drive line lubrication not required.
• Rugged soft-seat, high-flow check valves in gas section(s).
• Only hydrocarbon-free stainless steel, bronze, PTFE and Viton gas section internal parts exposed to gas flow.
• Heat of compression reduced for long seal life because cold exhaust air surrounds gas barrel(s) inside cooling sleeve(s) (see Figure 1, Item 4 above).
• Standard trim is weatherproof and suitable for offshore service.
Typical Applications:
• Pressure Testing Piping and Hardware for Leakage: e.g., oil field, refinery, aircraft, automotive, instrumentation using gases.
• Gas Injection: chemical process, plastic forming.
• Gas Scavenging: collecting costly gas in partially used cylinders and transferring it into high pressure receiver(s) for further use.
• Life Support Gas Transfer and Charging: e.g., oxygen, helium, breathing air, diving, fire fighting/hazmat, aircrew.
• Compressed Natural Gas (CNG) Boosting for vehicle refueling stations.


Air Driven Air Pressure Amplifiers
• Compact: installs off the floor, out of the way, in any position.
• 2 connections: plant air in, amplified air out. (Pilot air connection is optional for start-stop control with a PCV valve or solenoid valve and pressure switch.)
• Can replace a dedicated air compressor: 10 HP size in a typical large plant spot requirement for 100 PSI when only 80 PSI is available. (Model 5A-DS-2)
• Replace bottled nitrogen: up to 700 PSI (48.3 BAR) for air testing, lab or production. (Model 5A-DS-5 & 7A-DS-8)
Typical applications:
• Valve actuators
• Air starters
• Bin vibrators
• Pneumatic drill motors
• Air clamps
• Air brakes
• Off road tires


Electric Driven Boosters
Series 2G Electric Driven Booster package is ideal for filling or topping off low-pressure and high-pressure bottles. Its two-stage and double acting design uses NO Belts or Pulleys, making it the quietest Electric Driven Booster in its class; only 60 dBA. Air cooled with its integrated cooling fan reducing the heat of compression for long seal life.

Automatic stop & restart high pressure limit control FACTORY pre-set to 3000-psig (adjustable) Automatic stop & restart low pressure limit control FACTORY pre-set to 250-psig (adjustable) Manual start & stop switch
Safety relief valve set @ 3200-psi
Gas inlet pressure reducing regulator to control safe fill rates
Bypass line with on/off valve (needle type)
O2 cleaned to MIL-STD 1330D with certification
Double acting configuration
Inlet & outlet pressure gauges (calibrated with certs)
Hour meter with 6-digits
Sealed ball bearings
Inlet & outlet 5-micron filters
Outlet and bleed valves (needle type)
Air cooled 

Dual outlet pressure control
Inlet & outlet hose kits
Remote start/stop switch
with 6-foot cord

Four (4) port outlet manifold
2-stage configurations
Gas inlet & outlet Quick Couplings (QD)


High Pressure Components
PILOT CUTOFF VALVES, High Pressure, Low Flow
These valves are direct operated, differential poppet, dry spring chamber design. All ports can accept full working pressure permitting their use also as a sequence valve or back pressure controller regulator (BPR). Wetted alloys are stainless steel. Dynamic seals are UHMWPE. Static seals are Buna. Optional: Viton add-V. EPR add-E. Wrench flats are standard on adjusting screws.*  
Sense Liquid or Gas Pressures. Provide Air Signal.
These valves perform a function similar to a pressure switch. The sensing piston or plunger movement is spring or air adjusted. When the sensed pressure is reached, a small, integral air valve shifts position cutting off, or providing, a pilot air signal. Useful for start/stop control of various pneumatically piloted devices such as HII pumps, valves and boosters. Maximum air valve pressure is 120 PSI. Sensing section alloys are stainless steel. Buna static seal standard, optional: Viton add-V, EPR add -E. (e.g. PCV-E002E)  
Normally Open, Normally Closed, Air Pilot Actuated.
These valves open or close high pressure oil or plain water back to tank or to another line or high pressure gas to another line. High pressure section alloys are stainless steel with stainless steel ball or poppet design. 
High Pressure. These valves are 316 S.S. ball type and soft seat (PTFE ring) in the 1/4 NPT, 1/2 NPT, 3/4 NPT, and 1 NPT sizes; Brass poppet on S.S. seat in the 2 NPT size. Control springs hold approximately 3 PSI. Optional higher pressure springs are available in the 2” NPT unit only. 
This air operated valve opens and closes high pressure liquid or gas connection. Balanced poppet, piston actuated, normally open, bubble tight design assures high reliability. Minimum actuation is a 30-PSI and Maximum is a 150-PSI. Constructed of 316-SS with a Cv = 0.75 
Model IA100K3 is rated to 100,000 PSI output with a displacement of 3 cu. in./cycle. It can be used to intensify any liquid or gas compatible with 15-5 PH SS, BUNA-N and polyurethane. Minimum inlet pressures are 1500 PSI liquid; 5000 PSI gas.
The drive section consumes approx. 34 cu. in./cycle and can accept plain water or petroleum based hydraulic oil to 10,000PSI. Cycle rate should be limited to 2 cpm depending on the application.
High Pressure. These units are normally used at the outlet of an HII Gas Booster or system to store a volume of gas for smooth, intermittent release through a pressure reducing valve.


Package Systems
Air Driven Gas Boosters
Low Pressure, High Flow, Oil-Free
For Use With:
Liquified gases at ambient temperature(both phases)
Vaporizers off cryogenic tanks
Instrument air (or plant air) 

Air Driven Standard System Packages
Standard Liquid Pump Packages
Standard Gas Booster Packages
Standard Air Pressure Amplifier Packages
Custom Units

Gas Booster Package Systems
Sport Diving
Fire Departments

High-Pressure Breathing Air Systems
For Municipal or Industrial Fire Departments that operate multi-stage
mechanical air compressors with purification and storage cylinders

Applications for HII Products  

    Mechanical Press Overload Systems in Automotive Body Plants
    QDC (Quick Die Change) Clamping systems
    Testing of Fuel Injectors
    CNG Natural Gas Refueling systems
    Hydrogen Gas Refueling systems
    Airbag Inflation Charging Systems
    Hose and Radiator Pressure Testing
    Air Conditioning Charging and Leak Detection
    Brake System Testing
    LPG Recovery and Charging 

Airline & Aerospace 

    Oxygen Life Support Charging
    Escape Chute Charging –Co2 Charging
    Aircraft Jacking
    Helium Leak Pressure Testing
    Missile Test Systems
    Fire Protection
    Pressure Testing of Hydraulic systems - Skydrol
    Gas charging for aircraft tire inflation
    Accumulator Charging on Landing Gear, (suspension) 

    Supercritical and subcritical Botanical oil extraction
    CO2 gas & liquid extraction 

Defense - Air
    Operation of Aircraft Jacks
    Aircraft Seat Ejection – CO2  cylinder charging
    Charging of Oxygen Life Support Cylinders
    Charging of Helicopter Pop Floats
    Fire Prevention Systems 

Defense - Land
    Gun Recoil – Tanks
    Gas Suspension – Tanks
    Tank Jacking Systems
    Missile Launch Leveling
    Armaments Manufacture – Testing
    Argon Cooling on Infrared Systems – Missiles, Night Sights etc 

Defense - Sea 
    Life Support Cylinder Charging
    Gun Recoil
    Gun Turret Leveling
    Engine Bolt Tensioning
    Boiler Testing

Electronics & Computer Industry 
    Wafer Washing
    Chip Dicing and Sawing
    Gas Purging 

Fire, Health & Safety
    Stretch Testing & Charging Fire Extinguisher Cylinders
    Breathing Air Cylinder Charging
    Rescue Tools - Operation of Jaws of Life
    Oxygen Generation Systems – PSA Systems for Remote Field Hospitals (MASH) 

General Manufacturing
    Pressure Testing of Valves, Hoses, Pipes, Gauges, Pressure Vessels etc
    Water-Jet Cutting and Blasting
    Autofrettage of High Pressure Components
    Gas Cylinder Filling and Charging
    Pressure Gauge Calibration
    Operating Hydraulic Jacks
    Tire Curing Presses
    Filter Presses
    Accumulator Charging
    Powering Crimping and Riveting Tools
    Bolt Tensioning
    Wire Forming
    Isostatic Presses

Laboratory, University & Research 
    Liquid CO2 Chromatography
    Supercritical Extraction
    Geological Testing 

Machine Tool
    Roller Tensioning
    Hydraulic and Pneumatic actuation of cylinders
    Lube and Coolant spraying
    Machine Tool Flushing
    Gun drilling – Machining Centers
    Machine Tool Counter Balance accumulator charging
    QDC Clamping
    Laser Cutting 

Mining & Tunneling 

    Setting of Hydraulic Mine Props
    Drilling Dust Suppression
    Rock Bursting Tools
    Fire Prevention
    Testing of Roof Support Systems
    Oxygen Charging of Life Support Bottles
    Tunnel Shield Operation 

Oil & Gas
    Wellhead Control Panels
    Chemical Injection
    Blowout Preventers
    Wire Line Lubrication
    Pressure Testing of Valves, pipelines, hoses, cylinders, accumulators, pressure vessels and components
    Valve Actuation
    Subsurface Safety Valve Control
    Diesel Engine Air Start Systems 

    CO2 filling paintball bottles
    Air or Nitrogen filling bottles to 5500 psi 

    Gas Assisted Injection Molding
    P.E.T Blow Molding
    Injection of Blowing Agents
    Air Sleeves – Plastic Printing 

Power & Energy 
    Valve Actuation
    Nitrogen and SF6 Charging and Recovery Systems – Circuit Breakers
    Boiler and Heat Exchange Pressure Testing
    Heat Exchanger Tube Swaging systems
    Boiler Descaling
    Live Wire Crimping tools 

    Hub Pulling – Bearing Removal
    Bolt Tensioning
    Wheel Lubrication
    Air Conditioning Testing and CFC Recovery
    Ballast Dump Carts
    Engine Air star-up systems 

Recreational Sports
    Filling and Charging Scuba Dive Bottles
    Oxygen and Nitrox Dive Cylinder filling and charging
    Stretch Testing Cylinders
    Paint Gun Cylinder charging
•    Charging Nitrous Oxide Bottles



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