The contractor knew this pump
control design would be a problem. The caustic metering
system had to perform from 1 to 40 GPH with accuracy.
Normally this would have taken weeks to install on site,
with a difficult integration of the control panel and a
lengthy calibration and startup procedure. Wastech Controls
engineered a complete solution, fabricated it off-site, and
delivered it on-time, pretested and ready to operate.
The unit included four DC
drive metering pumps with local control panels, calibration
columns, pulsation dampeners, pressure regulators, magnetic
flow meters, and a NEMA-4X stainless steel remote control
panel. The panel included SCR drives, RPM indication, stroke
length indication, flow rate indication in GPM, HOA pump
control switches, indicator status lights, communications,
and numerous alarm conditions.