... intelligent valve actuator & easy to contral 1.GENERAL DESCRIPTION Electric Linear Travel Modulating Actuator is a new member of series SND. ... and accurate control on modulating valves. They are used extensively power plants, metallurgical industry, sewage disposal and ventilation.The general ... over torque, and travel limit, etc.2.SERVICE ENVIRONMENT2.1 Power supply: Single phase, 220 V, AC, 50 Hz (or ...