Neptune Chemical Pump Co. introduces its GLV Series valveless metering pump, designed to eliminate gas-locking during sodium hypochlorite injection. The GLV Series pump is designed for 12% to 15% sodium hypochlorite or other chemicals with severe off-gassing problems. The product’s pump capacity ranges from 0.002 gph to 5.7 gph; discharge pressure is rated to 150 psi. Capacity is adjusted by changing the stroking speed either manually or by an external 4-20 mA signal.