11
dispatch. The set value is slightly greater than or equal to the maximum torque (MV max) needed for opening
and closing the valve. The user need not adjust it.
10.1 In case that “Torque positioning method” is used, if the valve can not be hermetically closed after T.SW
acts, and there is certain distance between the indicator and the limit plate, you may adjust the indicator
toward the limit plate to increase value MK. If adjustment can’t be done any more, inspection must be made
according to point 1,2 in table 1. If everything is normal, this means that the actuator selected is smaller than
that needed. Its output torque does not meet the requirement.
10.2 In case that “Torque positioning” method is used, if the sealing force of the valve can’t be determined
accurately, in order to reduce excessive unit pressure for hermetic closing of the valve, you may firstly set a
smaller value MK1, (MK1<MK) according to the “Torque switch graduations-output torque” curve on the
products ex-factory test report. Find out the position of the indicator from the curve and set the indicator in
this position. If hermetic closing can’t be realized with such set value, increase value MK1 gradually until
hermetic closing is realized.
11. Precautions for operation and maintenance.
11.1 The valve stem cap or the pipe tap on the top of the actuator must be tightened reliably. When the valve
stem cap or the pipe tap is removed for maintenance, it is necessary to cover the top of the actuator to avoid
falling in of foreign matters.
11.2 The glass of position indicating window should never be hit by solid matters.
11.3 Do not carry out outdoor installing or open the cover of the G.L.SW box, the T.SW box and other
electric hermetic position.
11.4 After maintenance and adjusting have been carried out, it is necessary to mount up and tighten the parts
for sealing the electric components and care should be taken to keep the sealing rings not lost to avoid
invading of moisture and rain water which may cause the electric components malfunction or parts damaging.
11.5 When opening the enclosure of electric assembly, it is necessary firstly to cut off the power.
11.6 The power of motor depended on output torque, speed of the actuator. The user should never replace the
motor arbitrarily.
11.7 Should never remove or reduce the limit plate of the torque
11.8 In case of “Torque positioning”, the spring cover of torque should never loose or remove (The spring
cover of torque of SMC-04,03 located on the position of manual/electric changeover axle, the spring cover of
torque SMC-00~4 located on the position of handwheel axle.)
11.9 After the manual/electric change lever is set in “Manual position, do not move it to “electric” position
artificially.
To conduct manual/electric changeover, press the lever down as indicated by the arrow referring to the
nameplate on the lever. If not seated, turn the handwheel appropriately.
11.10 When manual operation is to be conducted, do not turn the handwheel forcibly by way of adding a
sleeve or inserting a rod.
11.11 When the actuator has been removed from the valve to be serviced and then mounted again, it is
necessary to adjust the G.L,SW before putting it into operation.
11.12 In case that the actuator is rarely used, a scheme of periodical starting and inspection of electric valve
should be made if the production process allows to do so.
11.13 Ground bolt and ground cable of the actuator should be connected reliably.
11.14The design service life of actuator is 8000 times.
11.15 According to the regulations on the recycling and treatment of waste electrical and electronic products,
please comply with the relevant national regulations and properly dispose of waste products. Or call our
after-sales service department for recycling. Tel: 022-26740033.
11.16 Service commitment: When the equipment breaks down, please contact the technical responsible
person appointed by our company at first, and we will provide processing opinions and technical support
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