Air Over Oil Reservoirs - Base Mount

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Additional Product Information

Air over oil reservoirs provide precision hydraulic power from shop air. Exact cylinder movement is achieved without the high cost of conventional hydraulic power requiring pump, motor, filter, etc.

Basic circuits, when used with low pressure hydraulic check, flow control and directional valves, allow oil (driven at 1 : 1 ratio) to force piston rod at the same speed through both forward and return stroke. The speed control is adjustable to your work requirement.

Standard Features:

  • 1/8 or 1/4 inch NPTF air inlet
  • 1/4-20UNF for mounting
  • 1/4, 3/8 or 1/2 inch NTPF fluid outlet

Standard Materials:

  • Aluminum base and cover
  • Buna N seals
  • Steel stem
  • Break resistant, colorless, transparent polymer bowl
  • Aluminum bowl and sight gage may be specified




Temperature & Pressure Ratings

Maximum working temperature:

  • Polymer up to 140°F (60°C)
  • Aluminum up to 250°F (121.1°C)

Maximum working pressure:

  • Polymer up to 80 PSI (552 kPa)
  • Aluminum up to 125 PSI (861.9 kPa)

Product Options

Custom Modifications Available

  • Modifications of aluminum bowl or aluminum bowl with gage available. Consult our factory.

Minimum quantities may apply.



LDI - Corporate  Click for map LDI   Click for map
Precision Machining & Assembly Fabrication & Assembly
1864 Nagle Ave. 12901 Jim Dhamer Dr.
Manitowoc, WI  54220 Huntley, IL  60142
PH: 920.682.6877                         
FAX: 920.684.7210                                    



Our talented team of degreed and professionally certified Engineers, Quality Assurance, Production and Customer Service staff have many years of experience in the industry.  Their attention to detail and ability to collaborate with our clients to solve their problems is reflected in the 50+ years we have been in business.


Customer Service: 

920.682.6877, option 4

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