Q General Equipment Co., Ltd. Jiangsu Lan valve valve actuators technical parameters of this product complies with a JB / T8528-97 "common type valve actuators technical conditions" requirement. b are two power supply: 220V single-phase and three-phase 380V power supply (the user can optionally). c products for the outdoor type valve symbol Guinness, its protection rating of IP67. d Ambient temperature: -30 ~ 70 ℃. e altitude of not more than 1000m. f ambient relative humidity less than 90% (25 ℃) g work environment free of corrosive media. h shall not be used in explosive gas mixture environment. i products for short-time work, the rated time of 10min. j no strong vibration conditions. Jiangsu Lan valve General Equipment Co., Ltd. to improve customer service system to achieve our "everything for the user satisfaction" commitment. Valve actuators counter also called stroke control mechanism: the decimal gear, plunger, cam and micro switch composition, referred to as counter. It works by decelerating box a pinion (Z = 8) led the counter works, if the counter by the valve open or closed position has been adjusted electric valve, when the counter with the output shaft to pre-tuned position ( laps) valve knowledge, the cam is rotated 90 o. Oppression micro switch operation, cut off the power supply, the motor stops, the trip has been achieved for electrical devices (revolutions) control. In order to control the valve more revolutions, the adjustable cam turn 180 o or 270 o re oppression micro switch operation. Valve symbol Daquan _ _ 江苏兰 valve valve provided by 江苏兰 valve General Equipment Co.江苏兰 valve General Equipment Co., Ltd. (www.lanfa.cn) strong, credible, in Changzhou, Jiangsu regulating valve industry has accumulated a large number of loyal customers. The company better work attitude and constantly improving innovative ideas will lead Jiangsu Lan valve and you hand into the brilliant, for a better future!