Presented in Partnership with:
 
 

Ask the Expert Question-and-Answer Archive (Wastewater Treatment)

by Mike McGinness, EcoShield Environmental Systems, Inc.
November, 2006

Blowers

Q. When you want to save money on energy costs. Do you throttle the suction or discharge valve down?

Whats the most common Impeller on a Centrifugal Pump Open or Closed Impeller?

A. The answer is to throttle the suction if you want to save energy. But be carefull that you allow enough to air flow to cool the blower bearings! Check the manual for details on the minimum continuous air flow and maximum pressure. If you choke the flow too much the pumped air and bearings will overheat.

I am not sure that either one is really more common. I am told that the open impellers are better at handling solids, and the data I have seen indicates to me that closed impellers tend to be more energy efficient.

Regards,

Mike McGinness

 

 


The information contained in this site is provided for your review and convenience. It is not intended to provide legal advice with respect to any federal, state, or local regulation.
You should consult with legal counsel and appropriate authorities before interpreting any regulations or undertaking any specific course of action.

Please note that many of the regulatory discussions on STERC refer to federal regulations. In many cases, states or local governments have promulgated relevant rules and standards
that are different and/or more stringent than the federal regulations. Therefore, to assure full compliance, you should investigate and comply with all applicable federal, state and local regulations.