Shop 3L Series Air-Driven Liquid Pumps
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 back-pressure to the pump), the pump will decrease its reciprocating action. Back-pressure 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.
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Shop All 3L Series Air-Driven Pumps
Click on the model number in the chart below to view that item. Options show below are most common and readily available.
Don't see what you need? Ask our technical team for a unit fit for your application!
| Product SKU | Max Outlet Pressure | Displacement (in3) | Inlet Port | Outlet Port | Material | Lead Time | Price |
|---|---|---|---|---|---|---|---|
| 3L-SS-8 | 1,200 | 13.44 | 3/4" NPT | 1/2" NPT | 316SS Hydraulic Body, 316SS Hydraulic Plunger, 316SS Check Valves, Buna-N Static O-Rings, UHMWPE Plunger Seal | 2-3 Weeks | $1,177.00 |
| 3L-SS-14 | 1,950 | 7.54 | 3/4" NPT | 1/2" NPT | 316SS Hydraulic Body, 316SS Hydraulic Plunger, 316SS Check Valves, Buna-N Static O-Rings, UHMWPE Plunger Seal | Same Day | $1,205.00 |
| 3L-SS-25 | 3,750 | 4.1 | 3/8" NPT | 1/4" NPT | 316SS Hydraulic Body, 316SS Hydraulic Plunger, 316SS Check Valves, Buna-N Static O-Rings, UHMWPE Plunger Seal | 8-Weeks | $820.00 |
| 3L-SS-41 | 6,150 | 2.46 | 3/8" NPT | 1/4" NPT | 316SS Hydraulic Body, 316SS Hydraulic Plunger, 316SS Check Valves, Buna-N Static O-Rings, UHMWPE Plunger Seal | Same Day | $820.00 |
| 3L-SS-81 | 12,150 | 1.31 | 3/8" NPT | 1/4" NPT | 316SS Hydraulic Body, 316SS Hydraulic Plunger, 316SS Check Valves, Buna-N Static O-Rings, UHMWPE Plunger Seal | 2-3 Weeks | $820.00 |
| 3L-SS-125 | 15,000 | 0.82 | 3/8" NPT | 1/4" NPT | 15-5 PH Hydraulic Body, 316SS Hydraulic Plunger, 316SS Check Valves, Buna-N Static O-Rings, UHMWPE Plunger Seal | Same Day | $820.00 |
| 3L-SS-220 | 15,000 | 0.49 | 3/8" NPT | 1/4" SP | 15-5 PH Hydraulic Body, 15-5 PH Hydraulic Plunger, 15-5 PH Check Valves, Buna-N Static O-Rings, UHMWPE Plunger Seal | 8-Weeks | $889.00 |
Technical Information
Still need help? Give us a call at 281.941.2310 or email us at sales@onehydraulics.com for technical support.