Diaphragm metering pump features automatic air-release valve

Neptune Chemical Pump Co . has introduced its 500AR-Series, hydraulic diaphragm metering-pump. The 500AR is designed with an automatic air release valve to be used in sodium hypochlorite service or with other chemicals that off-gas at room temperature.

The unit features a PVC head-design that minimizes internal space, eliminating areas where gas can accumulate. All ports slope upward to vent gas through the top of the pump and away from the diaphragm. The PVC AR head can be specified on any Neptune Series 500E pump with capacities up to 9 gph. (Units with higher volume capacities purge gas naturally.)

As with all Series 500 ‘dia-PUMPs,’ the 500AR features a Teflon diaphragm to isolate process chemicals from the pump’s working parts and from the environment and eliminates packing and seals.

All Series 500 models feature a micrometer dial that allows manual adjustment over 10-1 turndown range. Automatic control options include pneumatic, or electric, stroke-length adjustment and variable speed drives. All Neptune Series 500 pumps also feature Variable Oil By-pass stroke adjustment, allowing improved valve performance over variable linkage designs.

— Richard Phelps, senior editor, Control Engineering
richard.phelps@reedbusiness.com

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