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  1. Wendell H

    Using Positive Displacement Pumps in Series

    LittleInch - Good thoughts. The material is very close to treacle. That is a really good comparison. SwinnyGG - I've used a damper tank in the past - worked well but I do not have the room for a tank. Very tight quarters. crshears - thanks for the thought. To all - thanks for the...
  2. Wendell H

    Using Positive Displacement Pumps in Series

    The oil we are pumping is a raw material in a storage tank (RM storage). The pumps are sliding vane pumps. I understand the issue with running pumps in series - the second pump becomes a maintenance nightmare - too high suction pressure, thrust bearing issues, etc. crshears thought of running...
  3. Wendell H

    Using Positive Displacement Pumps in Series

    The pipe is either indoors (controlled environment) or traced and insulated. Elevated temperatures of the fluid do help but is not an option.
  4. Wendell H

    Using Positive Displacement Pumps in Series

    Can anyone help me with this problem. I have an existing RM storage tank system 700 feet from the end user. 3 inch CS transfer line with PD pump at tank. The raw material is an oil with a viscosity between 1400 and 2000 cP depending upon the temperature. I have completed my calculations and...

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