THE MORE CONVENIENT CHOICE

Since it was introduced to the water and waste treatment markets in 1993, the Accu-Tab System has become the leader in tablet chlorination.  And here's why...

SAFER...The Accu-Tab System is a good alternative to chlorine gas.  Because there are no chlorine cylinders to handle, leaks can't occur.  There's no need for SCBA gear and costly scrubber systems - just rubber gloves and safety glasses.  So, generally, Process Safety Management and Risk Management Program compliance concerns dissappear.

SIMPLE...Accu-Tab three-inch calcium hypochlorite tablets are easy to store and handle in convenient 25kg pails.

ACCURATE...The Accu-Tab System is as accurate as gas, more consistent than bleach and easier to maintain than both.

LOW MAINTENANCE...Patented erosion chlorinators have no moving parts or small openings to clog, and eliminate the need for metering pumps.  That cuts maintenance to a minimum.

A LOW CAPITAL COST ALTERNATIVE

As regluatory requirements and safety issues provide increasing incentive for water treatment plants to reconsider their water treatment systems, it is important to recognize that the Accu-Tab System's solid form of chlorine offers safety and low maintenance benefits together with small capital investments.

The Accu-Tab System consists of a chlorinator and tablets.  Gas and bleach have significant capital costs and require accessories to achieve compliance with regulatory requirements.  Then ther is the factor of downtime from malfunctioning metering pumps, replacement costs for corroded piping or electrical systems and lost labour time, whether from adjusting chlorine levels - or worse - from accidental spills, splashes and leaks.  The chart tells the story.

CHLORINATION BY EROSION TECHNOLOGY

The Accu-Tab System combines uniquely designed, patented chlorinators with slow release 65% calcium hypochlorite to provide one complete system for tablet chlorination.

Accu-Tab gravity chlorinators are not designed to hold pressure, which would cause them to fill with water and erode all the tablets at once.  Instead, incoming water from a side stream contacts only the tablets at the bottom of the feeder, so tablets at the top stay dry.  No premature dissolving.  Accu-Tab tablets erode at a predictable rate according to the amount of water that enters the chlorinator. By controlling the water flow rate, highly accurate chlorine dosage can be achieved.  Chlorinator effluent is returned to the unchlorinated main system flow providing the desired level of available chlorine to meet your operational requirements.

ACCU-TAB TABLETS

There are two types of Accu-Tab calcium hypochlorite tablets.

1. Accu-Tab (SI) - potable water (drinking water) and waste water.

2. Accu-Tab (Blue) - commercial swimming pool chlorination.

Accu-Tab SI (scale inhibitor) tablets are specially formulated to inhibit scaling in hard water applications.  The scale inhibited tablets provide:

• Chlorination and scale prevention in one easy step
• Control of scale formulation in chlorinator
• Suitable for water with up to 500 ppm calcium

Both Accu-Tab (SI) and Accu-Tab (Blue) tablets offer accurate, effective chlorination and easy-to-handle packaging in 25kg pails.

THE GRAVITY RETURN SYSTEM

The gravity system represents the ultimate in reliability with negligible capital costs.  Nothing moves but the water.  All that's required is the PVC chlorinator, a rotameter, a few valves and some PVC pipe.

A gravity return installation routes a sidestream of the main water flow through a simple rotameter and valve used to adjust the flow of the chlorinator.  The chlorinator must be in an elevated position so that its effluent drains by gravity (to ensure that the chlorinator never fills with water).  The specific chloinator model, rotameter and piping size necessary will vary, depending on the chlorine dosage required.

Being calcium hypochlorite-based, the Accu-Tab system is not required to have a separate entry building or room, as is the case with chlorine gas, and takes up a fraction of the space required for a similar bleach system.  As a result, the system can often be installed in smaller, more convenient locations, increasing both operational efficiency and reducing chemical delivery problems.  Since the chlorinated effluent is never pressurized, the potential of a chlorinated solution spraying out of a corroded tor broken pipe is eliminated.

The system is easily adaptable for automatic control with the addition of an actuated control valve to adjust incoming water flow and an ORP or residual chlorine analyser.  What could be simpler?

THE PRESSURE RETURN SYSTEM

A pressure return system removes a sidestream of the main water flow and introduces a portion of it into the chlorinator where Accu-Tab tablets are eroded at a controlled rate.  A centrifugal pump re-injects the resulting chlorinated solution back into the main water line.  This sidestream loop is nearly identical to the familiar chlorine gas injection system, without the danger and the hassle.

PPG engineered systems are designed specifically for use with the Accu-Tab calcium hypochlorite tablets and chlorinators.

Pressure return units provide a compact, turnkey system based on any of the AccuTab chlorinator models.  They come complete with valves, piping, pumps, surge tanks and the electronic controls necessary to dose the desired amount of chlorine into the main water system.  Systems are also available with multiple chlorinators, automatic controllers and SCADA compatability.