The Ernie Graves Company news blog covers industrial application solutions, training notes, and generally cool things going on in our world of liquid and gas measurement & control.
Introducing the 4? digital control valve cash for clunkers trade-in program. Send us your old Smith valves (dead or alive) and we’ll issue $750 credit per valve towards the purchase of new drop in replacement Brodie valves.
There are two types of digital control valves installed in the field at various truck loading racks, the Smith model 210 valve, and the Brodie BV88 / Daniel 788 valves. These valve designs use similar Asco solenoids to operate the main valve via a signal from an electronic batching device or electronic preset. Their differences lie in the operating principles.
The diaphragm design utilized in the Smith valve contains 50% more effective area on the top of the diaphragm (closing portion) than on the bottom, resulting in an unstable device. Since the valve is on a steep portion of the flow rate versus percent opening curve, the controls are constantly searching for a stable valve position, causing excessive chattering and wear on the solenoids.
The Brodie valve utilizes a balanced stainless steel piston that is spring biased (loaded). It is a linear valve which enables the controls to be extremely stable when establishing and maintaining the desired flow rate. The life expectancy substantially increases with this design.
Interested in taking us up on this offer? Fill out this form and one of our valve specialists will get things moving.
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