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rollers for tubing compression shall be located 180 degrees apart and two guide <br /> rollers that do not compress the tubing shall be located 180 degrees apart. The <br /> roller diameters and occlusion gap shall be factory set to provide the optimum <br /> tubing compression; field adjustment shall not be required. Spring-loaded or <br /> ' hinged rollers shall not be used. <br /> 4. Rotor assembly shall be installed on a D-shaped, chrome plated motor shaft and <br /> removable without tools. <br /> 5. Pump head and tubing compression surface shall be corrosion resistant Valox <br /> thermoplastic. <br /> ' 6. The pump head cover shall be clear, polycarbonate thermoplastic with an integral <br /> ball bearing fitted to support the overhung load on the motor shaft. Cover shall <br /> include an imbedded magnetic safety interlock which will limit the motor rotation <br /> ' speed to 6 RPM when removed. <br /> 7. Cover shall be positively secured to the pump head using a minimum of four <br /> thumb screws. Tools shall not be required to remove the pump head cover. <br /> ' C. HOSE <br /> 1. Pump tube shall be assembled to connect fittings of PVDF material. <br /> ' 2. Connection fittings shall be permanently clamped to the tubing with stainless <br /> steel clamps or over molded directly to the tubing. To prevent tubing <br /> misalignment and ensure accuracy, fittings shall insert into keyed slots located in <br /> the pump head and secured in place by the pump head cover. <br /> D. DRIVE SYSTEM <br /> 1. The drive system shall be factory installed and totally enclosed in a NEMA 4X, <br /> (IP66) wash-down enclosure. <br /> 2. The drive shall be capable of operating on any input power from 110VAC to <br /> 240VAC, 50/60 Hz single phase supply without user configuration or selection <br /> ' switches. <br /> The skid shall include the appropriate number of receptacles to allow the pump to <br /> be plugged into. <br /> 3-4. The motor shall be reversible, brushless DC gear motor rated for continuous <br /> duty. <br /> 4.5. Motor shall include overload protection. <br /> 5-.6. The maximum gear motor RPM shall be 125 RPM. <br /> E. CONTROL CIRCUITRY <br /> ' 1. All control circuitries shall be integral to the pump and capable of adjusting the <br /> pump motor speed from 0.01% to 100.0% in 0.01% increments less than 10% <br /> motor speed, in 0.01% and in 0.1% increments greater than 10% motor speed <br /> ' (10,000:1 turndown ratio). <br /> 2. The pump output shall be capable of being manually controlled via front panel <br /> touchscreen. The pump motor speed shall be adjustable from 0.01% to 100.0% <br /> ' in 0.01% increments less than 10% motor speed and in 0.1% increments greater <br /> than 10% motor speed. <br /> 3. The pump output shall be capable of being remotely controlled via 4-20mA <br /> ' analog input. The input resolution shall be 0.01 of input value and capable of <br /> adjusting the pump motor speed from 0% to 100.0% motor speed in 0.1% <br /> increments. Four values shall be user configurable to define the low and high <br /> ' points on the output slope: a low input value, the required pump percentage of <br />