The PV750 rotary vane pump from Presvac is designed for continuous full-vacuum operation. It provides 400 cfm free air, 350 cfm at 15 inches Hg, a maximum vacuum of 27 inches Hg, and maximum pressure of 35 psi. Dual fans and twin ballast ports efficiently cool the pump. The solid housing with deep cooling ribs allows for greater heat transfer from the vacuum chamber. Aluminum fans and shrouding work like a heat exchanger to further aid in heat reduction. Multiple manifold and drive options are available for truck, trailer or stationary applications. 800/387-7763; www.presvac.com.