气动薄膜式执行机构.doc

HYK-VAA ZSC Series Pneumatic diaphragm actuator GENERAL This Series provides high performance, high power diaphragm actuators of multi-spring type that are compact and light. Receiving pneumatic or electric signals, the unit balances the force created when diaphragm is airpressured through positioner and the force of compressed spring, so that the output shaft is controlled and placed at a set position. Control of position by pneumatic signals(20～100KPa) directly applied on diaphragm is also possible. Combination with VAA positioner provides high accuracy position control. STANDARD SPECIFICATIONS Series ZSC Type Multi-spring type Size 210、20、30、450、0 Function Direct acting (DA) ：Air to output shaft down. Reverse acting (RA) ：Air to output shaft up. Output force See Table 1. Stroke See Table 2. Air supply 140 KPa G 、300 KPa G 、30 KPa G Spring range 20～100 KPa G、80～200 KPa G120～300 KPa G ?????? 21、20 Size：21、20 only Performance Hysteresis ：Less than 0.8% of Full stroke with positioner. Less than 1.0% of Full stroke with positioner for Spring range 120～300KPa G. Less than 5% of Full stroke without positioner. Linearity ：Less than ±1.5% of Full stroke with positioner. Less than ±2% of Full stroke with positioner for Spring range 120～300KPa G. Less than ±4% of Full stroke without positioner. * The above hyteresis and linearity vary depending on the gland packing material of 11the control valves. Ambient temperature Standard type?????????????????????????????－10～＋70℃ High temperature service (option)?? 0～＋100℃ Low temperature service (option)????－40～＋40℃ Materials Diaphragm case ???????? SPHE Diaphragm ????????????????????EPDM Drive shaft ????????????????????SUS303 Yoke ????????????????????????FC Painting Orange ( Epoxy resin group ) Accessories E／P Positioner, P／P Positioner, Air-set, Booster relay, Air-valve, Limit switch, Solenoid valve, Lock-valve, Speed controller, Position transmitter, etc. Option Manual handwheel, Yoke mater