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
adjust5�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 SR
single 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 end of the cylinder body while the springs at each ends
inside the cylinder body is forced to shrink with the air between
the pistons and the ends of the cylinder body released from air
entrance(B),in the meantime,the racks of pistons drive the output
shaft(gear wheel) simultaneously to rotate anticlockwise(
0°**0°).
When Actuators is in loss of air The two pistons of cylinder moved
to the middle direction by elasticity of the spring Then the air in
the middle space outed from port (A) Make the two pistons rack
synchronized driving the two output shaft clockwise rotate(
*0°*0°).
(If installed the two pistons in relative direction The spring
reset output shaft will move into the negative direction in inverse
direction when the springs It is the single function turn-back CCW
type).
�
The model of the spring
return actuators
The suggested safety, factor for spring return actuator under
normal working conditions is ****0% .
Example: The torque needed by valve=*0N.m
Air Supply=5Bar
According to the table of spring return actuators’output, we
find output torque of JHA***5SR K9 is:
Air stroke 0°=**5N.m
Air stroke *0°=**6N. m
Spring stroke *0°=**4N. m
Spring stroke 0°=**5N. m
All the output torque is larger than we needed.
Attention:�
During the restoration,the spring return actuators’Output
torque will not be affected by the ing air from the port B. On
the contrary, it will help the restoration of springs.
Spring mounting form for
spring return actuators
During selecting the spring return actuators,we can choose the
more reasonable and more economical actuators,if we know the
different torque needed by the valve working at opening,operating
and closing.
Example:
The max torque needed by the butterfly valve=**4N.m
The torque after opened(operating)**4x*0%=*2N.m
Air Supply=5Bar
We can select the JHA***5SR K*1
Output torque is:
Air stroke 0°=**6N.m>**4N.m
Air stroke *0°=*7N.m>*2N.m
Spring stroke *0°=**5N.m>*2N.m
Spring stroke 0°=**5N.m>**4N.m
The above data show the actuator’s torque can satisfy the
requirement of the butterfly valve
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
| Country: |
China |
| Model No: |
JHA0255SR
|
| FOB Price: |
30 ~ 1000 / Set (Negotiable)
Get Latest Price
|
| Place of Origin: |
- |
| Price for Minimum Order: |
30 per Set |
| Minimum Order Quantity: |
10 Set |
| Packaging Detail: |
Outer packing:Carton and wooden frame to protect the goods during transportation Inner packing:Ctn |
| Delivery Time: |
30-45days |
| Supplying Ability: |
100000 Set per Year |
| Payment Type: |
L/C, T/T |
| Product Group : |
SR pneumatic actuator
|
