Product search Brand Hale Hamilton (1) Product Category Pumps (79) Centrifugal (20) Gear (5) Progressing Cavity (17) Three Screw (34) Twin Screw (3) Regulators (6) Pressure (4) Spring (2) Valves (4) (-) Drain (1) Shut-off Valve (3) Product Markets Commercial Aerospace (1) Defense (1) Industrial Gases (1) Oil & Gas (1) (-) Power Generation (1) Product Type Search Search Hale Hamilton Series DV4 (Internal Switch)