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Trucks + Get AlertsCase Study: Centrifugal pumps solve overheating issues
Problem: Best Enterprises, long-time vacuum truck builder located in Cabot, Ark., was experiencing consistent overheating and failure of wash-down pumps due to cycling. They had been using a pressure switch to prevent pump failure, but leaks in the lines and valves would constantly turn the pump on and off. Cycling was causing the pressure switch to fail as well.
Solution: MTH Pumps suggested its DC10 centrifugal pump, with the use of a simple bypass line. It is designed to run for up to two hours at shutoff without any heat or mechanical seal problems, eliminating the need for valves and pressure switches. Manufactured with cast stainless steel wetted parts and adding a standard dry run seal enhances reliability.
Result: After more than five years, Best Enterprises has a nearly flawless record using these pumps. 630/552-4115; www.mthpumps.com.
Case Study: Portable restroom vacuum unit needed for cold climate
Problem: The portable sanitation vacuum unit owned by R.C. Stahlnecker, Milton, Pa., was at the end of its life cycle. It had the standard two compartments – wastewater and freshwater. Working in a cold climate, Stahlnecker wanted to batch-mix a saltwater brine solution in cold weather and transport rather than mix the brine as needed at worksites.
Solution: Because the new chassis was tight for space, adding a separate plastic tank wasn’t an option. So Pik Rite engineered a 1,250-gallon steel vacuum tank with three compartments. In addition, the unit was equipped with dual-side service wands, a lowered heavy-duty restroom rack, a driver’s side workstation, a 20-gpm wash-down freshwater system and six work lights for night and low-light work.
Result: Stahlnecker found hauling the premixed solution was more efficient, and technicians were able to service more units in a workday. 800/236-9763; www.pikrite.com.