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This newsletter is e-mailed by McCrometer monthly to subscribers worldwide. It consists of flow measurement information of interest for professionals in this field.

For More information on our complete line of flowmeters go to: <<http://www.mccrometer.com>>

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McCrometer Newsletter - December 2002

Choosing a Propeller Meter for Clean and Dirty Water Flows

Propeller meters are a popular choice for measuring both clean and dirty water flows. But with so many different designs on the market, how does the user decide which is best for their particular application? Here is a look at some critical propeller meter design features.

In clean water applications, a meter with a low mechanical drag will insure a high degree of accuracy over a large flow turndown. A meter design with low/no drag wear will result in a stable accuracy over the life of the meter. A good example is the Water Specialties Propeller Meter. It utilizes an all-ceramic precision ground bushing design for low drag, and negligible wear throughout the meter’s life. Clean water applications also demand that the meter installation is contaminant free. Users should look for a flow meter that does not use grease or oil on the fluid-exposed surfaces.

The major design criteria for a dirty water application requires a meter that can resist tangling and clogging, and withstand the impact of solids and abrasive wear over time. Using a meter with a live axle design would achieve the former, while a rigid, heavy-duty impeller would help prevent wear and damage from the flow media. Another critical feature for meters in dirty water applications is to have as few moving parts as possible. For example, the McCrometer Propeller meter is designed with fewer moving parts than most propeller meters, making it both more resistant to wear and easier to maintain.

To find out more about McCrometer's line of propeller flow meters, including the Water Specialties Propeller Meter and McCrometer Propeller meter, contact McCrometer at 951-652-6811 or visit our web-site at www.mccrometer.com.

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Copyright 2002 McCrometer

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Newsletter Editor <<newscomment@mccrometer.com>>

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