"Control your gas feed automatically"
FX-8E Auto-pacing Valve
-
Automates any chlorinator system.
-
Can also be used for Sulphur Dioxide, Ammonia, or Carbon Dioxide
-
Takes a standard 4-20mA signal from a flow meter, compound loop control system, or PLC.
-
Available as a "Servo Only" to retrofit cabinet style units.
-
V- Notch sizes from 0-5 to 0-2000 PPD feed rates.
-
Available with auto/manual control and input LED display.
-
Optional 4-20mA retransmission output and limit switches.
The Foxcroft FX-8(E) is a gas feed control valve that can be used to automate existing or new chlorination systems. The servo constantly changes valve position to follow the input signal, which can be from a flow meter, compound loop controller, or any 4-20mA signal control source. A dosage control allows adjustment of valve travel, and hence chlorine residuals, from 50% to 200% of span. The servo uses a variable-speed reversible AC gear motor for smooth, even response to even slight changes in the control signal.
Installation is simply a matter of plumbing the FX-8 unit in-line between the chlorinator and the injector. What type of input signal is used depends on the application. A signal from a flow meter will provide "flow-paced" control of your chlorine residual levels. Typically this is done where flows vary considerably and chlorine demand is reasonably constant. A signal from a chlorine analyzer and a set point (or compound-loop) controller will provide "residual-paced" control. This setup is used where flow is constant and chlorine demand is variable. Signals from a flow meter and a chlorine residual analyzer, connected through a compound-loop controller, will provide flow and residual-paced or "compound-loop" control. Compound-loop control is used where flow and chlorine demand are both variable and/or where a higher degree of chlorine residual control is required.
Several option are available including: Auto/Manual Control, LED Input Display, 4-20mA valve Position Re-transmitter, and Valve Position Limit Switches.
