HII Liquid Pump 3L-SS-220

Max outlet pressure: 22,500 PSI; Volume Displacement: 0.03 in3

$1,111.00 Including Tax is $1,380.97

SKU: 01150007 Category:

Available on backorder

Estimated delivery between 2024/09/18 - 2024/09/22

Hydraulics International, Inc. (HII) air driven liquid pumps operate on the principle of differential working areas. An air piston drives a smaller diameter plunger or piston to provide a pressure ratio. The pressure ratio is the method of determining maximum outlet pressure available. Hydraulics International model numbers reflect the nominal pressure ratio of the pumps. Hydraulics International liquid pumps operate at a drive air pressure of 12-150 psi (0.8-10 Bar) and will cycle automatically when compressed air is first applied to the drive. It will start cycling at its maximum speed thus producing maximum fluid flow. At this stage, the pump is acting as a transfer pump, filling the pressure system with fluid. As resistance increases in the system (creating backpressure to the pump), the pump will decrease its reciprocating action. Backpressure in the system finally balances with the incoming air drive pressure times the ratio. At this point, the pump will stall and maintain pressure without consuming any energy. If there is further demand on the system for flow, the pump will automatically start cycling again.

■ Air Drive line lubrication not required.
■ Self-priming for immediate operation.
■ Compatible with all hydraulic fluids, plain water, distilled & deionized water, solvents, mild chemicals and most liquefied aerosol type gases.
■ Stainless steel hydraulic body, check valves, and trim are standard, except -4 and -7 models.
■ Alternative gases that can drive the pump include nitrogen, vapor from liquefied gas, pipeline natural gas and sour natural gas with proper modifications.
■ Offer a wide range of standard modifications.
■ 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 (5516 Bar).
■ Ideal for stop-start applications under full load.
■ Easy to install and operate.
■ ISO 9001: 2008 & AS9100-2009 Certified Quality System
Additional information
Weight 9 lbs
Max Outlet Pressure (PSI)


Volume Displacement Per Cycle (IN3)


Inlet Liquid Port

3/8″ NPT

Outlet Liquid Port

1/4″ SP

Country of Manufacture

United States




Hydraulics International, Inc.
HII Liquid Pump 3L-SS-220

Available on backorder

Estimated delivery between 2024/09/18 - 2024/09/22