Automatic surface (skimmer) blowdown is an extremely cost effective investment for most boiler operations. TDS control via skimmer blowdown offers savings from a variety of sources.

 

  • Energy - Minimizes waste of heated water
  • Water - Increased cycles of concentration
  • Chemicals - Maximizes chemical effciency
  • Equipment Protection - Proper blowdown control helps keep heat exchange surfaces free of scale
Description:
The Models B-7M & B-8M controllers from Water Wise of America Inc. offer an economical boiler control system with the accuracy and convenience of a meter read-out. Each controller features an analog dual scale meter display with a switch selectable scale range 0-3000 or 0-6000 mS.

The Models B-7m & B-8m are furnished in TPE molded enclosures with padlockable Lexan viewing windows.

Access holes are provided at the bottom of the enclosures for electrical connections. Proper conduit fittings will allow the units to retain a NEMA 4X rating.

Timed Sampling
 The Model B-7 controller incorporates a sample timer which allows the boiler to be sampled at periodic intervals. Sample intervals are adjustable from approximately 5 minutes to 6 hours. Sample duration (On-Time) is adjustable from approximately 15 seconds to 5 minutes. As a general rule, timed sampling is used if the boiler's blowdown requirement is less than 5000 lbs/Hr.

Continuous Sampling
The Model B-8 controller is designed for continuous sampling of boilers. This system should be used only when blowdown requirements are high enough to insure that a continuous sample does not "over blow" the boiler.

Specifications:
 Range: ..................................0-3000, 0-6000 mS switch selectable
Electrode:..............................Part No. BE-1C, molded Ryton and stainless steel provided in 1" (2.5cm) cross. Pressure 250 psi (17.3 bar.) Temperature maximum 400 deg. F (204 deg C), wiring - 1/2" threaded Conduit T.
Accuracy:..............................+/-2%
Drift:......................................Less than .25%/month.
Differential:............................6% factory setting.
Power(input).........................115 VAC, 50/60 HZ. (95-135 VAC)
Control:.................................115 VAC, 5 amp max. normally open & normally closed contacts provided.
Environment:..........................Ambient temperature -40-140degree F (-40 - 60 deg C) 0-100% relative humidity.
Elclosure:...............................Molded TPE with padlockable gasketed Lexan door. Conduit holes provided.
Dimensions:............................8 lbs. (with electrode assembly).