The Wallace & Tiernan range of controllers has been created to provide total flexibility within chemical dosing and disinfection systems.

Products are designed with the very latest communications protocol, and offer a selection of supervisory control and data acquisition units at the highest level, through local controllers down to dedicated PID or function controllers.

  

 

Direct mA Input Control for Gas Feed Systems and Metering Pumps
The Wallace & Tiernan Products direct mA input positioner is available for remote or simple automatic control of a gas feed system or metering pump. This positioner accepts a 4-20 mA input signal from a remote manual control station, SCADA, or other centralized control system. An integral dosage function provides for dosing an input from a flow transmitter.

(TI-40-050-GE.pdf - 225K)

(CN432.100.pdf - 533K)

(CN442.408.pdf - 531K)


SCU Signal-Conditioning Unit
The Wallace & Tiernan Products micro-processor- based SCU (Signal Conditioning Unit) provides automatic flow paced control of feed rate for gas feed systems and metering pumps. The SCU controller is specifically developed for chlorination/dechlorination and chemical feed systems. It is also ideal for remote manual control of a chlorinator or metering pump or it can be used to dose the flow input on a metering pump's SCR variable speed drive

(TI-40-100-GE.pdf - 134K)



PCU Process-Control Unit
Wallace & Tiernan Products micro-processor- based PCU (Process Control Unit) is specifically designed for automatic residual or compound loop con-trol of disinfection, dechlorination and chemical feed in any water conditioning or industrial process application. Typically used as a setpoint controller, the PCU provides accurate control of gas feed equipment as well as chemical metering pump stroke length or variable speed drive applications. Easy operation, setup and calibration using menu-structured electronics make sophisticated control functions simple with the PCU.

(TI-40-200-GE.pdf - 137K)

V600 Disinfection Controller
The new V600 Disinfection Controller is the very latest dedicated controller designed by Wallace & Tiernan incorporating the latest advanced electronics and process control application features. The V600 is designed to accurately maintain the optimum chlorine residual in water by the precise regulation of the dose of chlorine or sulphur dioxide, in chlorination/de-chlorination or chloramination.

The V600 controller provides a comprehensive and unrivalled list of features for manual or automatic control of simple borehole applications through to complex treatment work facilities.

(V600 Sales Brochure SB-40-700-GE.pdf - 134K)

(V600 Frequently Asked Questions MI060404-GE.pdf)

ChemTrim Controller
The new Chemtrim Controller is the very latest dedicated controller designed by Wallace & Tiernan incorporating the latest advanced electronics and process control application features. The Chemtrim is designed to accurately maintain the optimum chlorine residual in water by the precise regulation of the dose of chlorine or sulphur dioxide, in chlorination/de-chlorination or chloramination.

The ChemTrim controller provides a comprehensive and unrivalled list of features for manual or automatic control of simple borehole applications through to complex treatment work facilities.

(SB-40-750-GE.pdf - 660K)

 

(ChemTrim Flow Diagrams)


CCU Chemical Changeover Controller
Automatic changeover of chemical supplies, from a duty to a standby supply, is a necessity in many installations which are not under constant supervision and is strongly recommended for all applications where temporary interruption of chemical supply might lead to unwanted complications. The CCU will provide this automatic changeover to ensure continuous chemical supply. The supply of chemical is controlled by a 3-port motorised valve, or by a pair of 2-port motorised valves. A pressure switch, or gauge is used to initiate changeover when the pressure falls to a preset level.

(SB-40-198-GE.pdf - 204K)


DCU Dosing Changeover Controller
The Wallace & Tiernan DCU Dosing Changeover Unit provides a cost effective method of controlling switchover between dosing systems either manually or automatically initiated as a result of alarm conditions from fault contact inputs from the process.
The user friendly device gives clear indication as to the status of each component within the dosing system with LED displays indicating whether Duty, Operating or Failed.

(SB-40-196-GE.pdf - 116K)



ChemPhos Controller – Phosphate Control System
To meet the requirements of the Urban Waste Water Directive, Wallace & Tiernan have designed the ChemPhos controller. The controller is designed to work in conjunction with a variety of chemicals and is supplied as a stand-alone controller or as part of a complete chemical dosing system. The choice of chemical will depend upon the particular site requirements and the operational conditions. The ChemPhos control system provides the user with the versatility of control to suit the application and the chemical used whether it be in liquid or granular form.

(SB-40-400-GE.pdf - 149K)


ChemSept Controller - Septicity Control Systems
Today's concerns with the prevention and treatment of septicity are centred around optimising treatment and reducing chemical costs. For this reason Wallace & Tiernan have designed the ChemSept controller. ChemSept is designed to work in conjunction with a variety of chemicals and is supplied as a stand-alone controller or as part of a complete chemical dosing system.
The choice of chemical will depend upon the design of the sewage network and the operational conditions. Chemical injection may take place at the beginning or the end of the network. The chemical selected may be used to treat the septicity once it has been formed or part of the preventative measures.

(SB-40-410-GE.pdf - 253K)