Hydraulics International 3L-ss-125 air driven liquid pump

  
This air-driven liquid pump is a reliable and efficient option for your hydraulic needs. With a rated pressure of 15000 psi (1034 bar), it is suitable for use in the hydraulic pumps, pumps & pump accessories, hydraulics, pneumatics, pumps & plumbing, and business & industrial categories. The pump action is single acting, and the power source is pneumatic. The inlet port diameter is 3/8 in, while the outlet port diameter is 1/4 in. The hydraulic pump type is a hydraulic inline piston pump, and the brand is Hydraulics International. This pump is designed to deliver maximum performance and is an excellent choice for those looking for a high-quality hydraulic pump. Also called 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 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. Advantages include - 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 as it requires no electrical power connections. Easy to adapt automatic controls. 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.

Got from a drilling company move. You'll get the high pressure tee fittings, regulator, high pressure gauges shown.

Not tested, don't know how they work, but they came from a working shop. Ask questions, make offers, just trying to generate some funds for building hot rods.