... for Beam Pumping Units application with special high slip (5 to 13%),very high starting torque and very soft ... durability, quiet operation ,reduced vibration ,advanced construction ,high safety and reliability in service, convenience for application and ... Service Factor:1.15 or 1.0.9,Protection Enclosure :TEFC ,IP55.10,Cooling Method:Surface Cooling ( ... : NEMA D motor for oilwell pump with high quality