Polymer solution shall undergo a tapered mixing intensity slope as it exits the initial sheer zone and passes through a second, and third mixing zones isolated by baffles. Each chamber shall contain Polymer activation efficiency consistent over the entire dilution water range. Mixing chamber shall be opaque to prevent solution degradation from ultraviolet light and to inhibit the growth of algae in the chamber. Clear or translucent mixing chambers shall be unacceptable. Impellers shall be driven by a 1 HP maximum wash-down duty motor. Motor shall be TEFC. Impeller speed shall be 1730 rpm, minimum. Motor shall be direct-coupled to impeller shafts. Dilution Water Control Dilution water shall be split into two streams. Primary water flow shall supply the mixing chamber. Secondary water flow shall be used to post dilute the activated polymer stream to desired feed concentration. Secondary water flow shall be used to post dilute the activated polymer stream to desired feed concentration. These two streams shall be completely blended by an integrated static mixer prior to application injection point. Unit shall have an electric solenoid valve for on/off control of total dilution water flow. Controls for the solenoid valve shall be factory installed/included in the polymer control system. Flow indicators and flow control valves shall be provided for the dilution water stream. The primary dilution water rotameter shall include a flow switch to sense loss of dilution water flow. Unit shall include a transparent static mixer in the solution discharge line. Injection valve The polymer injection valve shall be easily removed via a twist-lock connection for routine maintenance needs. Injection valves installed via a threaded connection shall not be acceptable. Injection valves that are installed inside the mixing chamber, or which require mixing chamber disassembly for servicing will not be accepted. The valve shall be easily disassembled with basic hand tools for cleaning during maintenance. The injection valve shall be sealed into the chamber top with two o-rings and shall have been tested while installed in the system to maintain a pressure of 100 psig. Neat Polymer Metering Pump
Polymer solution shall undergo a tapered mixing intensity slope as it exits the initial sheer zone and passes through a second, and third mixing zones isolated by baffles. Each chamber shall contain Polymer activation efficiency consistent over the entire dilution water range. Mixing chamber shall be opaque to prevent solution degradation from ultraviolet light and to inhibit the growth of algae in the chamber. Clear or translucent mixing chambers shall be unacceptable. Impellers shall be driven by a 1 HP maximum wash-down duty motor. Motor shall be TEFC. Impeller speed shall be 1730 rpm, minimum. Motor shall be direct-coupled to impeller shafts. Dilution Water Control Dilution water shall be split into two streams. Primary water flow shall supply the mixing chamber. Secondary water flow shall be used to post dilute the activated polymer stream to desired feed concentration. Secondary water flow shall be used to post dilute the activated polymer stream to desired feed concentration. These two streams shall be completely blended by an integrated static mixer prior to application injection point. Unit shall have an electric solenoid valve for on/off control of total dilution water flow. Controls for the solenoid valve shall be factory installed/included in the polymer control system. Flow indicators and flow control valves shall be provided for the dilution water stream. The primary dilution water rotameter shall include a flow switch to sense loss of dilution water flow. Unit shall include a transparent static mixer in the solution discharge line. Injection valve The polymer injection valve shall be easily removed via a twist-lock connection for routine maintenance needs. Injection valves installed via a threaded connection shall not be acceptable. Injection valves that are installed inside the mixing chamber, or which require mixing chamber disassembly for servicing will not be accepted. The valve shall be easily disassembled with basic hand tools for cleaning during maintenance. The injection valve shall be sealed into the chamber top with two o-rings and shall have been tested while installed in the system to maintain a pressure of 100 psig. Neat Polymer Metering Pump