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Products - Pneumatic Control Drive
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The KAT make power cylinders positions plant final
control elements like damper, butterfly valve etc.
PRINCIPLE OF OPERATION:
The position control unit mounted on the cylinder is
a forced balanced type instrument. Positioning is
based on the balance of two forces, one proportional
to the input signal (0.2 to 1kg /cm2) received
from the I/P converter and other proportional to the
stem position.
Change in input pressure signal
acts upon the diaphragm in the input signal bellow
creating a unbalanced force , which regulates
the pilot valve and opens or closes the cylinder
position. The motion of the actuator stem is
transmitted to the top end and on the feedback
spring through the follower arm and cam. As a
result tension in the feedback spring will vary as
the stem position changes, and balance is made
after accurately positioning the stem of the
cylinder. (Refer Fig. 1)
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Quardant Operation Hand Wheel
with enclosure
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SPECIFICATION:
| TYPE |
Double acting
pneumatic cylinder |
| CYLINDER MATERIAL |
Seamless, steel tube |
| END COVERS |
Cast Iron |
| PISTON ROD MATERIAL |
Hard chrome plated
steel |
| TIE ROD MATERIAL |
Steel (painted) |
| SEALS & PACKING |
Nitrile (upto 75 deg.C)
/ Viton(upto190 deg. C ) |
| CYLINDER BORE
(standard) |
3”, 4”, 6”, 8”- other
size on request |
| CYLINDER STROKE |
6”, 12”, 24”, 36”-
other strokes on request |
| DUTY |
Regulating/On-Off as
required |
| ACCURACY |
For stroke 36” & 24”
+1.5%,12”+ 2.5% & 6”+3.5% |
| PNEUMATIC
CONNECTION |
1/4"(For control
signal) |
| MOUNTING |
Trunion / End |
| AIR SUPPLY |
4 to 7 kg/cm2 |
| AIR CONSUMPTION |
2 m3 /hour
at supply pressure of 5.6 kg/cm2 |
| OPTIONAL FEATURE |
Air lock device,
Electronic Position trans. Limit Switch,
Hand Wheel, Enclosure, Solenoid Valve, Air
Filter Regulator with or without lubricator. |
Linear Operation Hand Wheel
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View Block Diagram
of Control Loop showing Damper / Valve Operation
using system of Power Cylinder
Click Here (.pdf
format) |
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