Chemical Metering Pump Resolves Maintenance Issues at West Valley Water District Treatment Plant

West Valley MD-3

Application:  West Valley Water District serves approximately 80,000 customers in Riverside County, located in Southern California.  Communities served include, Bloomington, Colton, Fontana, and Rialto, as well as some areas of San Bernardino, and Jurupa Valley.

West Valley treats water from groundwater wells (46%), surface water (30%), and the San Bernardino Valley Municipal Water District (24%).  Blue-White’s MD-3 Hybrid Metering Pumps were installed in well site 54 and well site 4 in Rialto, California, to resolve issues being experienced with the pumps in service.

Problem: Initially, West Valley was using a single diaphragm pump to inject 12.5% sodium hypochlorite to treat drinking water at well sites 54 and 4.  The pump at well site 54 runs at 34 ml/min with a varying pressure between 80 and 100PSI, averaging at 86PSI.  The pump at well site 4 runs at 84ml/min with a varying pressure between 70 and 90PSI, with an average pressure of 78PSI.  The diaphragm pumps originally in use consisted of a suction and discharge phase.  During the suction phase, gaseous chemicals like sodium hypochlorite are prone to problems such as vapor lock and loss of prime.

Each time the pumps’ lost prime, an operator had to travel to the well site and manually relieve the pressure with the pressure valve.  Tony Lopez, West Valley Production Operator, stated, “someone would have to service the pumps one to two times per month because of the pumps losing prime.”

Solution:  West Valley Water District replaced the single diaphragm pumps used at well site 54 and 4 with one of Blue-White’s Proseries-M® MD-3 double diaphragm metering pumps. The Dual Diaphragm configuration of the MD-3 means that when the first diaphragm is in the suction phase, the second diaphragm is in the discharge phase. The double diaphragms allow for fluid to be pumped at a near continuous flow, preventing two of the problems most often associated with diaphragm pumps: gas build up and loss of prime.

Result:  Blue-White’s dual diaphragm pumps were installed on October 27th, 2016 and have never experienced loss of prime.  Lopez says that “the MD-3 pumps have not been serviced since they have been installed.”  MD-3 Pumps have saved West Valley employees valuable labor time and effort.

Written by:

Amparo Burke, Advertising