The fluid recommended for use in these pumps and motors has a petroleum base and contains agents which provide oxidation inhibition and anti-rust, anti-foam and de-aerating properties.

Acceptable Alternate Fluids-The use of fluids others than petroleum based anti-wear R&O fluids requires that the maximum replenishment pressures must be increased.

Temperature

Operating temperatures are determined by the viscosity characteristics of the fluid used. Because high temperature degrade seals, reduce the service life of the fluid and create hazards, fluid temperatures should not exceed 180 F at the case drain.

Fluid must be cleaned before and continuously during operation by filters that maintain a cleanliness level NAS 1638 Class 8. (Class 9 for 15 Micron and smaller). Contaminant entrainment and generation may vary with each application. Proper filtration must be based on careful analysis of each particular application.

Maximum Contamination Limits (per 100 mls)

Performance Curves are based on 100 SSU oil leaving the cooler 40 F higher than the incoming water temperature used for cooling with a 2:1 oil to water flow ratio. (Curves are 1:1). This is also referred to as a 40 F approach temperature.

Step1. Determine your Heat Load.

This will vary with different systems, but typically coolers are sized to remove 25 to 50% of the input nameplate horsepower. (Example: 100 HP Power Unit x .33 = 33 HP heat load.) If BTU/Hr. 

Step 2. Determine Approach Temperature.

Step 3. Determine Curve Horsepower Heat Load.

Step 4. Enter curves at oil flow through cooler 
          and curve HP.

Any curve above the intersecting point will work.

Step 5. Determine oil pressure drop from curves: