Product Description

Product structure
1.Indicator
In field visible indicator and standard socket in accordance to VDI/DE***5,NAMUR could be installed and export all the accessories such as limit switch cabinet electric localizer and position sensor
2.Pinion
The pinion is high-precision and integrative,made from nickelled-alloy steel,full conform to the lastest standards of ISO***1,DIN***7,NAMUR,The dimensions can be customized and the�stainless steel is available.
3.Actuator Body
The extruded cylinder body is made of high quality aluminum alloy with fine machined socket and hard anodized outer surface( anodisation would be provided at special occasion + teflon coat)to prolong the service life and lower the coefficient of friction.
4.End caps
Die-casting aluminum powder polyester painted in different colours,PTFE or Nickel plated.
5.Pistons
The twin rack pistons are made from Die-casting aluminum treated with Hard anodized or made from Cast steel with galvanization,Symmetric mounting position,long cycle life and fast operation,reversing rotation by simply inverting the pistons.
6.Travel adjustment
The two independent extemal travel stop adjustment bolts can adjust ±5°at both open and close directions easily and precisely.
7.High performance springs
Preloaded coating springs are made from the high quality material for resistant to corrosion and longer service life,which can be demounted safely and conveniently to satisfy different requirements of torque by changing quantity of springs.
8.Bearings&Guides
Made from low friction,long-life compound material,to avoid the direct contact between metals.The maintenance and replacement are easy and convenient.
9.O-rings
NBR rubber O-rings provide trouble-free operation at standard temperature ranges,for high and low temperature applications Viton or Silicone.
*0.fasteners
All the fasteners are made of stainless steel to be resistant to corrosion for a long time.


Operating principle of DA double acting type

When the air source pressure comes into the cylinder body between the two pistons from air entrance(A)and pushes the pistons toward the ends of the cylinder body,the air between the pistons and the ends of the cylinder body is released from air entrance(B), actuator two piston racks synchronous drives the output shaft to rotate counterclockwise(0°**0°) .

The same, when air source pressure comes into the ends of the cylinder body from air entrance (B)and pushes the pistons toward each other with the air between two pistons released from air entrance(A),the output shaft(gear wheel)would be driven by the racks of the pistons simultaneously to rotate clockwise(*0°*0°).�

(If the pistons are assembled in different directions from each other,the output shaft would turn out to rotate inverse direction,namely the double acting reverse "CCW" type).


The model of the double acting actuators
An increment should be added to the identified valve torque for safe when select the pattern of the pneumatic actuator.For vapor or non-lubricant liquor medium, the increment should be up to *5% of the valve torque,*0% for non-lubricant pasting liquor medium,*0% for non-lubricant dry air medium,*0% for non-lubricant particle medium delivered be air and *0% for lubricating clean medium with low friction respectively, (the safe increment above is recommended in theory for reference)
Example:
The torque needed by valve= **0Nm
The torque considered safety factor(1**0%)=**0Nm
Air Supply=5Bar
According to the above table,we can choose the minimum model is JHA***0DA
Note:Make sure that the torque necessary to operate the valve is compatible with the actuator torque(it depends on both actuator type and air supply).
Please note that the requested torque depends not only on the valve,but also on the working conditions and the safety margins of the plant,too.
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Operating conditions:
1,Operating media: Dry or lubricated air, or the non-corrosive gases The maximum particle diameter must less than *0 µm�
2,Air supply pressure:
The minimum supply pressure is 2.5Bar
The maximum supply pressure is 8Bar
3,Operating temperature:
Standard: **0°C~**0°C
Low temperature: **5°C~**0°C
High temperature:**5°C~***0°C
4,Travel adjustment:Have adjustment range of ±5°for the rotation at 0°and *0°�
5,Application: Either indoor or outdoor
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