Vortex PhD Brochure - EMCO Flow Systems - #2

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Untitled table.main {} tr.row {} td.cell {} div.block {} div.paragraph {} .font0 { font:6.00pt "Arial", sans-serif; } .font1 { font:7.00pt "Arial", sans-serif; } .font2 { font:12.00pt "Arial", sans-serif; } .font3 { font:17.00pt "Arial", sans-serif; } .font4 { font:21.00pt "Arial", sans-serif; } .font5 { font:4.00pt "Times New Roman", serif; } .font6 { font:6.00pt "Times New Roman", serif; } .font7 { font:9.00pt "Times New Roman", serif; } How the Vortex PhD Measures Flow Vortex shedding is a physical phenomenon occurring in nature. As flow passes a bluff body in the flow stream, vortices are alternately shed on either side of the bluff body. This effect can be observed in the fluttering of a flag, where the flagpole is acting as a bluff body to the wind. The flag waves in response to the vortices shed as the wind passes the flagpole. According to well-proven physical laws, the frequency at which vortices are alternately shed is directly proportional to the flow velocity. Other EMCO Products The complète EMCO product line for liquid, gas, and steam applications includes industrial in-line vortex, industrial insertion vortex and turbine, commercial vortex, electromagnetic, and ultrasonic flow products. For more information, refer to the EMCO flow product guide on the EMCO website (www.emcoflow.com). SensorWing Bluff Body Alternating Vortices The vortices create low and high-pressure zones behind the bluff body. The Vortex PhD uses a piezoelectric crystal sensor to detect the pressure exerted by the vortices on the sensing wing. The piezoelectric crystal converts thèse "vortex puises" into electrical signais. The piezoelectric crystal is mounted outside the flow line to permit easy removal and replacement under full-flow conditions, without process shutdown or risk of exposure to hazardous fluids. The microprocessor-based electronics translates the electrical signais (flow velocity) into a flow rate, based on user-selected engineering units. The 8-character, 2-line, local display alternâtes between flow rate and totalized flow. A 4 to 20 mA current output and a frequency/pulse output are standard. EMCO a, EMCO Flow Systems is a division of Spirax Sarco, Inc. • 1150 Northpoint Blvd. • Blythewood, SC 29016 For information on EMCO industrial flow products, contact: EMCO Flow Systems • 1831 Lefthand Circle, Suite C • Longmont, CO 80501 T: 800.356.9362 or 303.682.7060 • F: 303.682.7069 • sales@emcoflow.com • www.emcoflow.com © Spirax Sarco, Inc. 2006 Ail rights reserved. Printed in U.S.A. SL-VPhD-250-02 2M 2/06 Vortex PhD and EZ-Logic are trademarks of Spirax Sarco, Inc. Hart® is a trademark of Emerson Process Management, Rosemount Division.