The Double Disc Pump from Penn Valley Pump provides a low life-cycle cost. The design eliminates the friction wear associated with progressive cavity and rotary lobe pump styles.  The pump can run dry without damage and incorporates a sealing trunnion that requires no maintenance, no seal water, no packing, no lubrication and does not leak. The company offers a free “Swap Your Pump” trial program that provides the opportunity to try the pump risk-free. 800/311-3311; www.pennvalleypump.com; Booth 5229