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REGENAIR

®

Regenerative Blowers

Blower System Design Tips

Performance Data The performance data shown in this catalog was determinedunder the following conditions:?Line voltage @ 60 Hz. 230V or 460V for three-phase units.115V or 230V for single-phase units.?Line voltage @ 50Hz. 220V for three-phase or single-phaseunits.?Units in a temperature stable condition.?Delivery measurements made with output port throttled. ?Suction measurements made with input port throttled.?Test Conditions: Inlet air density at 0.075 lbs. per cu.ft.[20 In order to utilize your regenerative blower most efficiently,proper system design is essential. The most important thing torecognize is that by utilizing large diameter plumbing, friction losses in plumbing can be greatly reduced. Here are someguidelines to use when setting up your blower system:1.The plumbing should at least be the same size as theblower port or ideally one size larger (example - blower has ports that are 1-1/2” NPT, plumbing should be 2”NPT). The plumbing should remain this size until it hasreached the location of the work area.2.Plumbing for Separate Drive Blowers operating above3500 RPM should be at least one pipe size larger than theblower ports.3.Elbows create additional friction which causes pressureloss and back pressure. Plumbing at least one pipe sizelarger than the blower pipe ports minimizes the friction loss they create.4.The pressure/vacuum relief valve should be installed in a“T” which is at least one pipe size larger than that of the exhaust of the blower. To properly protect a largehorsepower blower, set the relief value to limit the blowersduty to 5 in. H ° C (68 ° F), 29.92 in. Hg (14.7 PSIA)].?Normal performance variations on the resistance curvewithin ± 10% of supplied data can be expected.
2 O below its continuous duty rating.5.Operating the blowers at high altitude decreases theirmaximum pressure or vacuum duty rating. If this is aconsideration, review the information on Fan Laws in theApplication Engineering section of this catalog.6.The exhaust air temperature of the blowers increases withincreasing duty. At duties over 70 in. H
2 O it is too hot for mostplastic pipe. Metal pipe must be considered. To preventdanger of burns, access to these pipes should be limited,guarded or marked “Danger Hot.” Pictorial and dimensional data is subject to change without notice.The information presented in this catalog is based on technical data and test results of nominal units. It is believed to beaccurate and is offered as an aid in the selection of Gast products. It is the user’s responsibility to determine suitability ofthe product for intended use and the user assumes all risk and liability whatsoever in connection therewith.Gast can also provide CE compliant blowers with BSP threads, as well as customized blowers for specific applications.Consult a Gast Representative/Distributor for more information.Environmental and application conditions may affect advertised life.

Warning:

Models Without Explosion-Proof Motors Should Not Pump Combustible Gases or Be Used In Combustible Ambients Gast Manufacturing Inc., A Unit of IDEX Corporation, Benton Harbor, MI USA • ph 269-926-6171 • fx 269-925-8288 • www.gastmfg.com ®Registered Trademark/™Trademark of Gast Manufacturing Inc., Copyright ©2003 Gast Manufacturing Inc. All rights reserved. 3