The LMI Milton Roy Series P electromagnetic solenoid driven diaphragm pumps have manually adjustable stroke length control providing accurate pump output adjustment. The time tested electronics are totally encapsulated for protection against moisture and corrosive conditions, owing to the reliable, repeatable performances. NEMA 4X / IP65 enclosures ensure protection against corrosive environments. The priming valves have Fluorofilm® diaphragms and ramp style knobs for hands free priming. PumpCatalog.com offers several models: P0 (manual stroke length and fixed stroke frequency), P1 (manual stroke length and stroke frequency control), P7 (manual stroke length and selectable manual stroke frequency control or external pacing control)