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May 1, 2013

Metering pumps that exceed API 675 performance standards

The Hydro-Cell Metering Solutions line is comprised of six metering pumps ranging in capacity from 0.32 to 894.6 gal/h (1.21 to 3,386.4 L/h), with pressure ratings from 50 to 2,599 psi (3.4–172 bars). These pumps use variable frequency-drive electronic-flow adjustment to maintain greater accuracy throughout the turndown range, thereby meeting or exceeding API 675 performance standards by providing steady-state accuracy of ±1% or better, linearity of ±3% or better and repeatability of ±3% or better, says the company. Five of the six models feature multiple diaphragm designs that virtually eliminate pulsations. A single Hydra-Cell pump can often achieve the same capacity as an ordinary triplex metering-pump arrangement, taking up less floor space and lowering both investment and maintenance costs, says the company. — Wanner Pumps Ltd., Kowloon, Hong Kong

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