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technical data

DESCRIPTION

Each system is complete skid mounted unit which dilutes and activates all liquid polymers. The unit is designed for operation at a maximum of 100 psi at 100 oF. The unit is completely tested at 150 psi in the assembly facility.


MATERIALS

The frame is made of stainless steel for corrosion resistance. All fasteners are made of stainless steel. No coated steel or aluminum components are used. The frame is designed for easy access to all components. The polymer pump have all wetted metal parts made of 316 ss. The rotameter is made of plastic construction. The activation chamber components are made of PVC, acrylic, and stainless steel. Electrical components are assembled in watertight non-metallic enclosures. Polymer piping are made plastic. Polymer valves are made of polypropylene or stainless steel. The calibration column is made of polypropylene. The polymer injection valve has a Hastelloy-C spring. The solenoid valve is made of brass.


POLYMER PUMP

The polymer pump is a progressive cavity pump. Wetted parts are made of Stainless steel and Viton. The pump has a mechanical seal. Lip seals and packing type seals are not allowed. The pump is driven by a totally enclosed DC motor. The motor speed can be controlled locally or by a remote 4-20 mA signal. A ten turn potentiometer allows local fine motor speed control. Maximum pump speed is limited to 600 RPM.


POLYMER ACTIVATION SYSTEM

The polymer activation system mixes the water and polymer by hydraulic energy with no back mixing. Motor operated systems are not used. The activation system automatically compensates for changes in solution flow to provide constant activation energy. Systems which require the operator to manually adjust valves to set the activation energy levels are not allowed.


SIGHT GLASS

The unit has a sight glass or system to allow the operator to see that it is operating properly. The sight glass is capable of disassembly, without using tools, and have a cleaning mechanism that does not require operator attention.


POLYMER PIPING

Polymer piping is made of polypropylene with sections of polyethylene tubing or reinforced hose to allow easy disassembly. A polypropylene calibration chamber and polypropylene isolation valves are included to allow checking the polymer pump flow rate. The polymer injection valve to the activation apparatus is easily accessible without disturbing the other components. A vent valve is included to allow priming the polymer pump.


WATER PIPING AND CONTROLS

Water piping are made of brass or schedule 80 PVC with sections of reinforced hose to allow easy disassembly. The piping includes a brass strainer with a stainless steel 20 mesh screen. A low water flow cut-off switch turns off the polymer pump whenever the water flow drops below minimum. The pump automatically restarts when the rate of flow resumes. If the water flow does not resume within 10 seconds, the feeder shuts down and alarm. The switch is actuated only by water flow. Switches that only detect water pressure are not be allowed. A rotameter to measure the rate of water flow is included. The rotameter has a flow control valve. Valves are provided to allow draining the mixing apparatus and the water strainer. A solenoid valve is included. The feeder operates at water pressure as low as 30 psi.


ELECTRICAL CONTROL

Electrical enclosure is NEMA-4X. It includes all electrical components. Switches allows local or remote Start / Stop control and Pump Speed control. A digital display shows the pump speed scaled to indicate the polymer feed rate. A lockable disconnect switch is provided. Terminals are provided for all input and output signals. The system operates at 120 volts. Total power consumption is less than 1200 watts.All components are UL Listed. A thermal dispersion low polymer flow switch provides pump protection from low flow conditions. The switch setting is adjustable to below the minimum pump flow rate. The switch is easily accessible for inspection and cleaning.


FRAME

The frame is made of welded stainless steel. All fasteners are made of stainless steel. The frame is designed for easy access to all components.