keystone Electric actuator E051 is the electric actuator for quarter-turn valves.keystone Electric actuator E051 features:Voltage Ratings100 to 240 Volts DC or AC single phase,50/60 Hz. +/- 10% voltage toleranceWorking TemperatureStandard Range: -40F to 140F[-40C to 60C]Optional Ranges Covering From:-40F to 158F[-40C to 70C]Environmental ProtectionStandard Weather Tight EnclosureNEMA 4/4X/6 according toNEMA ICS6/NEMA 250IP68 according to EN 60529Standard unit is CSA (C-US)Optional Explosion Proof EnclosureNEMA 4/4X/6 according to NEMAICS6/NEMA 250IP68 according to EN 60529FM/CSA (C-US) NEC 505 (Class 1,Zones 1 & 2)NEC 500 (Class 1, Div. 2) At the same time, we still can offer the items as below: Keyston Electric Actuator KE EPI2-E013A0 Keyston Electric Actuator KE EPI2-E006A Keystone double acting and spring return MRP Keystone Pneumatic Actuators MRA Keystone Electric Actuator EPI 2 Keystone Pneumatic Actuator 79U Keystone Pneumatic Actuator MRP keystone Electric actuator E171 keystone Electric actuator E091 keystone Electric actuator E025 keystone Electric actuator E013 keystone Electric actuator E006