2. Mounting the Tefulong Actuator
2.1 Mounting the Actuator with Drive Base Comparing Tefulong actuator installation of linear range to that of other range which is with drive bush.The common point is that both of them have Normally, the Tefulong actuator is mounted on the valve with drive base. the same actuator and a thrust base, but the different point is that the linear The drive base includes two kinds- thrust base and non-thrust base. Both of one has a transforming bracket and a screw, of which one end are their key parts are drive bush which are directly mounted on the valve trapezoidal screw threads, and the other end is hexagon column.stem. The drive bush for thrust base has the type of trapezoidal screw threads, and for non-thrust base has the key, three jaws or square shaft. In Assemble the actuator with a screw and a bracket, couple the bracket to the general, before leaving the factory, the drive bush is either machined valve flange with fasteners, and couple the screw to valve stem with wafer depending on the data from valve factory or machined by users (It should nuts. be removed before machining). Note: The valve should be at its fully closed position when coupling. The flange standard of drive bases are under national standard. For multi- turn
actuators, flanges are F07, F10, F14, F25, F30, F35, and F40; for Usually, a part-turn valve needs a 90°gearbox, and a large torque multi-quarter-turn
actuators, flanges are F05, F07, F10, F12, and 2.3 Mounting the Actuator with Gearbox F14. However, turn valve needs a bevel gearbox or a spur gearbox.the flange can be made depending on drawing on request.Gearbox has a removable drive bush which is machined depending on the The actuator can be mounted on the valve directly with the drive base measure of the valve stem and connections. (except unmachined) before living the factory.Gearbox is always coupled to the damper with a rocker and spherical a) Before the thrust actuator is mounted on the valve, enable the drive bush linkage.onto the threaded valve stem, then engage “hand” and wind the handwheel anticlockwise to engage the drive bush onto the stem. Continue winding until it closes to the valve flange. Wind two further turns, fit securing bolts Check that power supply voltage whether agrees with that stamped on the and tighten fully.actuator nameplate.b) When the non-thrust actuator is mounted 2.4 Cable Connections and Wiring Diagram on the valve, place the drive The breaker or fuse for the actuator should be selected depending on the bush on the valve stem, fit securing bolts and tighten fully.rated current of the motor.There is a hollow shaft in AVA range actuator which is for the rising stem valve. In order to ensure that moisture does not intrude the hollow shaft of the actuator, PTFE tape should be winded around the cover and fully Earth/Ground Connections A lug with a 6mm diameter hole is cast adjacent to the conduit tightened. entries for attachment of an external protective earthing strap by a nut and bolt. An internal earth terminal is also provided.2.2 Mounting the Linear Actuator
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