Selection of Expansion Chamber

To determine the correct expansion chamber size required for your application, obtain the following data and execute the steps or click here for online worksheet.

The amount of oil, in ounces, normally in the bearing housing. ________oz.

1. Multiply above answer by 1.804 to obtain _______in³ (oil volume). Place this value into the table below STEPS A & B in³ (oil volume).
2. The temperature range of the bearing housing. High _______of Low _______of. Place High & Low temperature in STEP C. Subtract the low from the high and place in STEP A (high-low temp).
3. Complete STEP A. Multiply oil volume by temperature difference and coefficient of expansion. (NOTE: .0004 is coefficient of expansion for most turbine oils). Place answer in STEP D, in³ (oil expansion).
4. The total volume of the bearing housing. Many customers may not know this. Contact your pump manufacturer for this information. ________oz. (total volume).
5. Multiply answer from above by 1.804 to obtain _______in³ (sump volume). Place this value into the table STEP B in³ (sump volume).
6. Complete STEP B, subtract in³ (oil volume) from in³ (sump volume) to get in³ (air volume) and place answer in both places in STEP C, in³ (air volume).
7. Follow instructions in STEP C to get in³ (air expansion). Place answer into STEP D in³ (air expansion).
8. Complete STEP D by adding to get in³ (total expansion), with this information you can select the correct size expansion chamber for you application.