Processing Magazine

New precision gear flowmeters

September 8, 2008

Max Machinery, Inc. announces the release of a new line of precision gear flowmeters. The new meters operate at maximum flow rates of 4 L/min, 15 L/min, 45 L/min and 105 L/min, respectively, with 0.3 percent of reading accuracy across a 100:1 flow range, an exceptionally small margin of error over such a wide range of flow. All meters are calibrated with 30 cP fluid, but are compatible with fluid viscosities ranging from under 5 cP up to 100,000 cP and beyond. Rugged stainless steel bodies are designed to operate at pressures as high as 6000 psi and operate in a wide range of environments. The gear design has been optimized to minimize pressure drop and the high flow rate cavitation that many gear flow meters exhibit. Max gear meters are ideal for a large variety of applications, including hydraulic testing, motion control, and precision dispensing, and are particularly well-suited to processes involving extremely viscous fluids such as adhesives and sealants. During operation, fluid enters the meter, causing the gears to rotate and filling the gaps between the teeth. At the exit, the gear teeth mesh together and drive the fluid out. The rotational speed of the gears is proportional to the flow rate. The meters offer superior accuracy as a result of unique mechanical design features and custom electronic encoding methods. While most gear meters on the market count the passage of each gear tooth to determine flow rates, Max’s design uses proprietary techniques to directly detect gear position thousands of times per revolution, achieving extraordinary resolution and unparalleled response characteristics. This advantage is especially critical at low flow rates, where the Max flow meters provide 20 to 50 times the resolution typical of competitive meters, and faster response to flow rate changes.