Neptune Chemical Pump,a leading manufacturer of chemical metering pumps, designed its Neptune 500-D Series (Duplex) diaphragm metering pumps to precisely meter dust suppressant chemicals used in mining applications. Such suppressants include fibre-based dust palliatives, calcium chloride, magnesium chloride, lignosulphonate, petroleum resin and polymers. These suppressants help provide the desired level of dust control with a minimum amount of moisture, making it critical that these chemicals are dosed precisely.
Neptune Chemical Pump will be displaying its diaphragm metering pumps that deliver precise amounts of dust suppressant chemicals at MINExpo International 2012.
The 500-D Series pumps feature EZE-CLEANTM valve cartridges, which can be removed from the pump heads without having to disturb the pump’s piping. Neptune’s Variable Oil By-passTM design provides improved valve performance for applications that involve viscous chemicals by allowing additional time for the valves to seat properly. Other standard features include double ball-check valves, internal relief valve, and a hydraulically balanced Teflon® diaphragm for extended life. The 500-D pump head materials of construction are 316 stainless steel, C-20, PVC, and Kynar. Material options for the ball check valves are 316 stainless body and seat with 316 balls, PVC body and seat with ceramic balls, C-20 body and seat with C20 balls, and Kynar body and seat with ceramic balls.
Flow rates at 6.9 bar range from 4 to 228 litres/h depending on gear ratios of 37, 72, 117 and 144 strokes per minute. Maximum operating pressure is 207 bar and maximum temperature of 93ºC for 316 stainless steel and C-20; maximum pressure and temperature of PVC is 27.6 bar and the maximum pressure of Kynar is 10.3 bar.