CNZ series valve electric actuator is a new generation of products that our company improves and perfects the structure on the basis of the original mature products,optimizing the protection performance and key components.It has a compact structure,small size,beautiful appearance and stable performance.Reliable and other advantages.Good protection level can meet the needs of a variety of designs:flameproof type,overall switch type,overall adjustment type.
CNZ series products are used to control the opening and closing of the valve.It is suitable for gate valve,shut-off valve,diaphragm valve,and its derivative products can be used for ball valve,butterfly valve and damper,etc.It can accurately act according to control instructions and is indispensable for remote control,centralized control and automatic control of valve.Fewer drives.
The performance of this product complies with the peovisions of JB/T8528-1997(technical conditions for common valve electric devices).The performance of explosion-proof type complies with GB3836.1-2000(Electrical Equipment for Explosive Gas Environment Part 1:General Requirements) GB3836.2-2000(Electrical Equipment for Explosive Gas Environment Part 2:Explosion-proof Type”d”) and JB/T8529-1997(technical conditions for flameproof electric devices).
(1)Power supply:The motor is a three-phase AC380V,50Hz.Single-phase AC220V,50Hz,optional power supply:AC220-660V,50.60Hz(please specify when ordering)
(2)Ambient temperature:-20℃-+60℃ Optional temperature -40℃-+70℃
(3)Relative humidity:not more than 95%(at 25℃)
(4)Working environment:ordinary tpe is used in places without flammable,explosive and strong corrosive media;explosion-proof type(EXDIIBT4)use environment IIA,IIB class T1-T4 explosive gas mixture;explosion-proof type(EXDIIT4) CT4 Cover the application environment of BT4.
(6)Motor is working system;rated running time is 10 minutes(24 hours for special order),F-level insulation
(7)Anticorrosive coating:high temperature baking paint
3.CNZ Type Main Specifications
CNZ Type Main Specifications
|Input signal||4mA~20mA;Passive contact|
|Basic error limit||≤1%|
|Explosion-proof grade||ExdII BT4:|
|Motor working system:Standard long-term motor,F-class insulation|
5.Flange structure and connection dimensions
6. Flange structure and connection size
1）CNZ Series of actuator output interface（Torque type JB2920)
2）CNZ Series actuator interface size（Thrust type）
|Actuator model||Flange model||Size detail of actuator output interface (Thrust type GB 12222)|
|n-d||b||Screw hole direction||h||L|
7.Electrical control section
|Code name||Name||Model||Number||Remarks||Code name||Name||Model||Number||Remarks|
|FR||Thermal relay||1||User Self provided||LSF||Flash switch||V-157||1|
|KMOKMC||AC contactor||GJ10||1||User self provided||W1||Potentiometer||WX14-12||1|
|TSOTSC||Torque switch||DK3-2A||1||TH||Thermosensitive||1||Special order|
|LSOLSC||Travel switch||HWK-22A||1||RT||Space heater||1||Special order|
8. Installation method and precautions
(1)This device can be installed vertically and horizontally.When the motor is not downward,it should be convenient for wiring,debugging and manual operation.
(2)The axial clearance of the teeth that is connected to the valve is not less than 1-2mm.
(3)The first use after installtion must be debugged item by item according to the debugging requirements,and often the components can be put into use after they are normal.
(4)This device is a three-phase asynchronous motor for electric devices.Pay attention when debugging for a rated continuous working time of 10 minutes.
(5)Handle with care,keep it dry,and prevent contact with corrosive substances,so as not to damage electrical components and mechanical part.
When adjusting the torque and stroke,you must check whether the potentiometer on the position indicator has been disengaged(loosen the set screw on the potentiometer shaft to release it) to prevent damage.Special attention:When then newly installed electric device is powered for the first time,the phase sequence of the motor must be checked and the control wiring is corret to prevent the motor from running out of control.
(1)Adjustment of torque control mechanism:
a.First adjust the closing torque
b.Starting from small torque valve,gradually increase the torque valve until the valve is closed tightly.
c.Adjust the torque of the switch direction according to the working characteristcs of the valve.Generally,the torque in the open direction is large than that in the close direction
d.All the above adjustments are made under no-load without medium pressure and other factors.When there is pressure and temperature,attention should be paid to whether it can be closed tightly.If it is not closed tightly,increase the torque valve appropriately according to whether it is closed tightly or opened tightly.
(2)Adjustment of travel control mechanism:
a.Close the valve by hand.
b.Disconnect the travel control mechanism,that is,use a screwdriver to push the ejector pin in the travel control mechanism and turn it 90℃ to separate the driving pinion from the counter gear set.
c.Use a screwdriver to turn “close” to the adjusting shaft,and turn in the direction of the arrow until the cam presses the spring pressing plate to make the microswitch act,then the closing stroke is preliminarily adjusted.
d.Loosen the ejector pin to make the driving gear and the individual gears on both sides mesh correctly.In order to ensure their correct engagement,after loosening the ejector pin,it is necessary to turn the adjusting shaft slightl left and right with a screwdriver.At this time,it can be electrically opened for several turns and then closed,depending on whether the closeing stroke meets the requirements.If it does not meet the requirements,it can be readjusted according to the above procedures.
e.Opening direction adjustment:after the closeing direction is adjusted,open the valve to the required position by hand(note that the travel control mechanism cannot be disengaged at this time,otherwise the closing direction adjustment will be disturbed),then disconnect the travel control mechanism,rotate the”opening”direction adjustment shaft,and rorate in the direction of the arrow until the cam presses the spring pressing plate to make the microswitch act.Then make the stroke mechanism mesh with the driving gear,then the opening stroke is adjusted completely.After the stroke control mechanism is adjusted,it can be operated repeatedly for several times.Generally,the valve opening is controlled at about 90℃.
(3)Adjustment of adjustable opening indicator:
a.On the basis of adjusting torque and stroke,adjust adjustable opening indicator and remote potentiometer.
b.Close the valve(menual or electric)
c.First,adjust the adjusting gear on the gear set to the corresponding position according to the maximum turns of the valve,and then.
Push the closing symbol of the meter board to the pointer,turn the potentiometer to make it at the zero position,and make it on the potentiometer shaft
The gear of is meshed with the gear on the opening shaft.Tighten the set screw of the gear on the potentiometer shaft.
10. Maintenance spare parts
The device is generally allowed to work 10000 times under normal conditions.If parts are damaged due to improper and maintenance,the company can provide the following spare parts.
(2)Various “O” type oil resistant rubber sealing rings
(3)Various framework oil seals
(6)Travel control mechanism(counter)
(7)Adjustable opening indicator