Blue-White Proportional Feed System Maintains Constant Chemical Injection

Blue-White Proportional Feed System Maintains Constant Chemical Injection
Proportional feed system from Blue-White Industries

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The proportional feed system from Blue-White Industries is designed to maintain constant chemical injection to water flow ratio regardless of changes in the flow rate or pressure.

“In most water treatment applications you’re going to be injecting a chemical into a flow stream. And that flow stream is typically not a consistent flow rate,” says Bill McDowell, sales engineer, Blue-White Industries. “Coming out of a water well, the flow rate might be consistent if you have a well pump that is operating at, let’s say, 100 gpm. Typically you can put a ‘dumb’ pump in there and set it for a specific flow rate. It can inject maybe 1 ounce per gallon. But if the flow starts to vary, for instance, if you’re using a variable-speed well pump, then the chemical pump has to vary its output as well.”

The proportional feed system includes a Digi-Meter F-2000-PC digital paddlewheel flowmeter; Star Tanks in 7-, 15- or 30-gallon capacity; and a Chem-Feed C-1500N diaphragm-type or Flexflo A-100N peristaltic-type chemical-metering injection pump.

“All the user has to do is fill the tank with chemical and they’re ready to go,” he says.

The square Star Tanks can fit in a corner. They also have a vented lid to prevent vapor lock and shelf where the pump mounts. Accessories connect through the sidewall of the tank.

“Our F-2000 flowmeter has a number of ways to drive the pump,” McDowell says. “It has an electrical switch that enables the user to program the meter. For example, every time 10 gallons goes through your pipe the relay would energize and turn on the metering pump. The flowmeter can also count the batches and the number of times the pump was energized. That allows you to determine how much chemical you injected.”

The C-1500N diaphragm series of metering pumps can deliver up to 125 psi and flow rates of 228 gpd (600 mL/min), while the A-100N series of self-priming peristaltic metering pumps can pump slurries and gaseous chemicals.

“If you’re pumping chlorine or hydrogen peroxide or any kind of fluid where bubbles come out, you want a peristaltic pump,” McDowell says. “However, a peristaltic pump has pressure limits because it’s a squeeze tube that’s going to wear out and needs to be changed. Depending on your application, the tube might last from a few weeks to a year or two.”

Each system is factory wired and tested for trouble-free installation. 714/893-8529;


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