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be kept in dry environment if it cannot be mounted immediately. Don’t remove the sealing plug
before finishing connecting the wire so as to prevent the sealing performance from being
damaged.
2. The internal grounding and external grounding of the electric actuator shall be fastened
and reliable.
3. Cable shall be correctly connected to avoid the rain leaking into the electric actuator (the
first two connection patterns are right in the following picture.)
4.Product debugging
4.1 Adjustment
▲
The torque control mechanism has been tested and standardized before factory delivery. The
output torque complies with the maximum control torque shown on the nameplate, so users do not
need to re-adjust. Besides, the two mechanical limit screws on the product body have been
adjusted and fastened. Don’t loosen it even in special case.
▲
The cams and dials of the drive shaft, stroke control and position indication mechanism are
normally set at the “CLOSE” position, it is unnecessary to change the position of the dial in order
to be easy for observation when carrying out installation and commissioning.
▲
The potentiometer gear and the potentiometer shaft are under loosened state, preventing the
potentiometer from being damaged during commissioning.
▲
The cam on top of the stroke control mechanism is used to control “open” of the valve, and
the cam on the bottom is used to control “close” of the valve.
The adjustment of stroke control and position indication mechanism:
4.1.1 Operate the valve manually to the neutral position.
4.1.2 Start the electric actuator; confirm that movement direction of the valve matches to the
control when it is electrically controlled. If there is any error, change the phase sequence of the
power supply (this operation is not required for the integral type electric actuator equipped with
automatic phase changing function).
4.1.3 Manually operate the valve to “CLOSE” position; loosen the screw on the “CLOSE”
stroke cam; rotate the cam in the direction of closing the valve to make it touch the roller and
contact of the corresponding micro switch. When “click” from the micro switch is heard, the
screw on the cam can be tightened properly.
4.1.4 Manually operates the valve towards the open direction, causing the “CLOSE” stroke cam
to disengage from the roller and probe of the micro switch. And then, operate the valve towards
the close direction of the valve electrically to inspect the correctness of the valve “CLOSE”
position adjustment. If the control is correct and the action is sensitive, the adjustment is
acceptable. At this time, tighten the screw on the cam of “CLOSE” stroke reliably, no looseness is
allowed. If there is error with the valve “CLOSE” position, adjust the cam finely, and repeat the
inspection of the adjustment correctness until it is OK.
4.1.5 Operate the valve to “OPEN” position manually; loosen the screw on the “OPEN” stroke
Summary of Contents for NQB1
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