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CARB Approved IOM 12 - ARID Permeator AT-150 - VR-201-Z / VR-202-Z <br /> 5 <br /> Fil <br /> NI <br /> } <br /> PERMEATOR, internal view <br /> Figure 3 <br /> The vacuum pump, D removes hydrocarbons which have passed through or permeated <br /> the membrane to ensure a constant driving force for continuous separation. Our vacuum <br /> pump uses a rotary vane design which incorporates a shock-resistant design, integral <br /> flame arrestors on inlet and discharge and anti-static materials to prevent static discharge. <br /> The pump is housed in the main cabinet as seen above. <br /> The pressure sensor/transmitter, F is used to continuously monitor the combined ullage <br /> pressure in the gasoline storage tanks. The pressure information is sent to the plc located <br /> in the control panel. Based on pressure actuation set-points, the vacuum pump is started <br /> and stopped. <br /> Note: This pressure sensor is different from the pressure sensor installed as part <br /> of an In-Station Diagnostic (ISD) system so there can be slight <br /> variations in readings when comparing the two sensors depending on <br /> Permeator On/Off condition and other dynamics (temperature, <br /> atmospheric pressure, etc.). <br /> The oil level sensor, B, is used to continuously monitor oil level in the vacuum pump. If <br /> the oil level falls below a minimum threshold value, a light is illuminated on the panel to <br /> indicate a fault, the horn sounds and the power to the vacuum pump motor is interrupted <br /> 5 <br />