Shop 5L 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.
Style:
Max Outlet Pressure:
Volume Displacement per Cycle:
Liquid Port Inlet:
Liquid Port Outlet:
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5-3/4" Single Acting, Single Air Drive
5-3/4" Single Acting, Double Air Drive
5-3/4" Single Acting, Triple Air Drive
5-3/4" Double Acting, Single Air Drive
5-3/4" Double Acting, Double Air Drive
1,500psi to 80,000psi
0.18in3 to 8.84 in3
1/2" NPT to 1" NPT
1/2" NPT, to 1/4" Super Pressure Threaded and Coned
Click HERE to view the Catalog
Click HERE to view the Entire 5L-SS Single Acting, Single Air Drive Collection
Click HERE to view the Entire 5L-SD Single Acting, Double Air Drive Collection
Click HERE to view the Entire 5L-ST Single Acting, Triple Air Drive Collection
Click HERE to view the Entire 5L-DS Double Acting, Single Air Drive Collection
Click HERE to view the Entire 5L-DD Double Acting, Double Air Drive Collection
Shop All 5L 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!
Single Acting, Single Air Drive
| Product SKU | Max Outlet Pressure | Displacement (in3) | Inlet Port | Outlet Port | Lead Time | Price |
|---|---|---|---|---|---|---|
| 5L-SS-10 | 1,500 | 72.43 | 1" NPT | 3/4" NPT | 2-3 Weeks | $2,495.00 |
| 5L-SS-15 | 2,250 | 50.31 | 1" NPT | 3/4" NPT | 2-3 Weeks | $2,495.00 |
| 5L-SS-30 | 4,500 | 30.81 | 1/2" NPT | 1/2" NPT | 2-3 Weeks | $2,005.00 |
| 5L-SS-45 | 6,750 | 20.32 | 1/2" NPT | 1/2" NPT | 2-3 Weeks | $2,005.00 |
| 5L-SS-60 | 9,000 | 14.58 | 1/2" NPT | 1/2" NPT | 2-3 Weeks | $2,209.00 |
| 5L-SS-115 | 17,250 | 7.87 | 1/2" NPT | 1/2" NPT | 2-3 Weeks | $2,209.00 |
| 5L-SS-150 | 22,500 | 5.9 | 1/2" NPT | 1/4" SP | 2-3 Weeks | $2,586.00 |
| 5L-SS-205 | 30,750 | 4.26 | 1/2" NPT | 1/4" SP | 2-3 Weeks | $2,852.00 |
| 5L-SS-300 | 45,000 | 1.64 | 1/2" NPT | 1/4" SP | 2-3 Weeks | $3,050.00 |
| 5L-SS-450 | 67,500 | 1.97 | 1/2" NPT | 1/4" SP | 2-3 Weeks | $3,449.00 |
Single Acting, Double Air Drive
| Product SKU | Max Outlet Pressure | Displacement (in3) | Inlet Port | Outlet Port | Lead Time | Price |
|---|---|---|---|---|---|---|
| 5L-SD-20 | 3,000 | 72.43 | 1" NPT | 3/4" NPT | Same Day | $3,120.00 |
| 5L-SD-30 | 4,500 | 50.31 | 1" NPT | 3/4" NPT | 2-3 Weeks | $3,225.00 |
| 5L-SD-60 | 9,000 | 30.81 | 1/2" NPT | 1/2" NPT | 2-3 Weeks | $3,223.00 |
| 5L-SD-90 | 13,500 | 20.32 | 1/2" NPT | 1/2" NPT | 2-3 Weeks | $3,223.00 |
| 5L-SD-120 | 18,000 | 14.58 | 1/2" NPT | 1/2" NPT | 2-3 Weeks | $3,223.00 |
| 5L-SD-230 | 34,500 | 7.87 | 1/2" NPT | 1/4" SP | 2-3 Weeks | $3,678.00 |
| 5L-SD-300 | 45,000 | 5.9 | 1/2" NPT | 1/4" SP | 2-3 Weeks | $4,106.00 |
| 5L-SD-410 | 61,500 | 4.26 | 1/2" NPT | 1/4" SP | 2-3 Weeks | $4,106.00 |
| 5L-SD-600 | 80,000 | 2.95 | 1/2" NPT | 1/4" SP | 2-3 Weeks | $4,752.00 |
Single Acting, Triple Air Drive
| Product SKU | Max Outlet Pressure | Displacement (in3) | Inlet Port | Outlet Port | Lead Time | Price |
|---|---|---|---|---|---|---|
| 5L-ST-900 | 80,000 | 2.95 | 1/2" NPT | 1/4" SP | 2-3 Weeks | $6,852.00 |
Double Acting, Single Air Drive
| Product SKU | Max Outlet Pressure | Displacement (in3) | Inlet Port | Outlet Port | Lead Time | Price |
|---|---|---|---|---|---|---|
| 5L-DS-4 | 1,250 | 394.93 | #10 SAE (5/8") | #10 SAE (5/8") | 2-3 Weeks | $3,048.00 |
Double Acting, Double Air Drive
| Product SKU | Max Outlet Pressure | Displacement (in3) | Inlet Port | Outlet Port | Lead Time | Price |
|---|---|---|---|---|---|---|
| 5L-DD-20 | 3,000 | 144.86 | 1" FNPT | 3/4" FNPT | 2-3 Weeks | $4,822.00 |
| 5L-DD-30 | 4,500 | 100.62 | 1/2" FNPT | 1/2" FNPT | 2-3 Weeks | $4,940.00 |
| 5L-DD-60 | 9,000 | 61.62 | 1/2" FNPT | 1/2" FNPT | 2-3 Weeks | $4,006.00 |
| 5L-DD-90 | 13,500 | 40.64 | 1/2" FNPT | 1/2" FNPT | 2-3 Weeks | $4,205.00 |
| 5L-DD-120 | 18,000 | 29.17 | 1/2" FNPT | 1/2" FNPT | 2-3 Weeks | $4,334.00 |
| 5L-DD-230 | 34,500 | 15.73 | 1/2" FNPT | 1/4" SP | 2-3 Weeks | $4,501.00 |
| 5L-DD-300 | 45,000 | 11.8 | 1/2" FNPT | 1/4" SP | 2-3 Weeks | $4,945.00 |
| 5L-DD-410 | 61,500 | 8.52 | 1/2" FNPT | 1/4" SP | 2-3 Weeks | $4,945.00 |
| 5L-DD-600 | 80,500 | 5.9 | 1/2" FNPT | 1/4" SP | 2-3 Weeks | $6,765.00 |
Technical Information
With these pumps, as you increase pressure, you will decrease flow. If the pump flow is not high enough,
you may need to increase to a double acting or a double/triple air drive. For a helpful overall guide, see the chart below.
Still need help? Give us a call at 281.941.2310 or email us at sales@onehydraulics.com for technical support.