The Wallace & Tiernan Chem-Ad Series A is an electronically controlled, motor driven diaphragm metering pump. It is designed specifically for very low feedrate applications, particularly sodium hypochlorite. The pump features a unique, constant circulation liquid end with a calibrated, adjustable plunger for precise feedrate control. This design ensures consistent performance, even with chemicals that tend to outgas, such as hypochlorite.
The Chem-Ad series of diaphragm metering pumps provided by Siemens Water Technologies are designed to handle the most demanding applications in the treatment of potable water, swimming pools, wastewater and industrial processes. A well-balanced range of capacities combines with excellent reproducibility and optimal chemical resistance. Chem-Ad metering pumps are of the positive displacement-type driven by proven overload-proof motors. Since they are available with a wide choice of configurations ranging from manual to flow proportional to setpoint, these pumps can cover any metering requirement.
The XL Series, shown below, features an integrated LED display panel, touch-pad controls and multiple control functions, including feedrate setpoint with closed-loop control, flow/no-flow monitoring, batch operation and feedrate display.
Water Technologies
Wallace & Tiernan
Chem-Ad® Series A
Diaphragm Metering
Pump
Technical Information
TI 440.600-1 UA
Return To
Supply
Plunger
Re-Circulation
Diaphragm
To Application |
Feedrate |
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|
|
Adjustment |
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Knob |
From Supply
Key Benefits:
•Dependable low capacity metering from 0.06 USGPH (0.2 LPH) to 0.44 USGPH (0.5 LPH) and back pressures to 120 PSI (10 BAR @ 50 Hz)
•Reliable metering of most multi-phase fluids, particularly Sodium Hypochlorite, with integral auto de-gasing
•Flexible automatic signal input - analog or pulse
•Simple user-friendly pump calibration
•Continuous accurate chemical dosing
•Suitable for unmanned installations with auto controls and optional flow monitoring
•Easy to read back-lit digital display of pump capacity, strokes operating mode and alarm
•Low maintenance PVDF head standard
•Corrosion resistant IP65 enclosure
•CE marked electronics
Description
The Chem-Ad Series A model features manual control, or optional external control, and is designed to handle multiphase solutions that tend to out-gas.
Due to its unique design incorporating pre-feeding and a gasket-free ceramic piston/cylinder unit the pump can maintain a high reproducibility even when handling very low feed rates at maximum stroke frequency.
Its smooth pulsation characteristics ensure high metering accuracy and long life of diaphragms and valves. Due to its unparalleled low noise level and its enclosure, IP65, the ChemAd Series A is perfectly suitable for laboratories and humid ambient conditions.
The basic model has an ON/OFF switch, a level switch input, and alarm output connection. The standard liquid end made of PVDF ensures a wide range of chemical resistance.
Controls
Manual - E11
Manual control on-line by means of a mechanical stroke length adjustment via a two-turn knob graduated 0 to 100%. An on/off switch is also provided. There are connections to
accept level input and alarm output. |
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Automatic - E30 |
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The E30 Automatic option provides: |
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• Manual on-line stroke frequency |
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regulation - from 0-100%. |
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• External control by 0/4-20mA or |
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pulse input with stop function. |
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• Alarm output/stroke pulse output. |
I II III |
Oval Gear Meter
Intelligent Control Pack
Automatic - E60 (XL Model)
The automatic E60 (XL Model) includes:
•An integrated LED display panel for easy to read, clear indication of operating status and user friendly programming.
•A four key membrane touch pad simplifies function selection.
•Local or remote control via analog (0/4-20mA or 20-
4/0mA) or pulse input signals.
• Signal scaling allows for 
multiplying or division of the 
pulse input signal. 
• Flow/no flow verification via an 
optional flow monitor. 
Automatic - E60 Plus (XL Model)
With the addition of an intelligent control package (ICP) and Oval Gear Meter (OGM), the E60 becomes the full featured E60 Plus and includes:
•Set point controls with automatic frequency compensation for constant chemical feed
•Chemical consumption data logging
•Real time feed rate display
•Plug and play with calibration data storage on OGM
•Adjustable flow alarm points
Spares and Accessories
Liquid End PM Kits® Parts
For every model of the Chem-Ad Series A, a corresponding maintenance kit is available. This economically
priced package contains all spare and wear parts for a prompt and quick maintenance of the liquid end. The Chem-Ad series is available with additional useful accessories.
Suction Lance
This option includes pre-wired, built-in low and empty level switches, foot valve and strainer. This option is recommended with the Series A pump.
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