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Execution B
Reversible without dismanting the housing
● air-to-open : without external piping
● air-to-close
: with extermal piping
● integrated mounting of valve positioner
● spraywater-proof.
● corrosion-resistant |
Execution E
E = B + air scavenging system
● spring chamber protected by
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exhaust air scavenging. |
| Options : ●
transport eye-bolt ● stroke limitation ● stainless
steel diaphragm chamber |
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Execution C
● Fully reversible, by means of air reversing
● sleeve
● air-to-open and air-to-close actions without
● external piping
● integrated mounting of valve positioner |
● spraywater-proof
● corrosion-resistant
● spring chamber protected by exhaust air
● scavenging |
| Options : ●
transport eye-bolt ● stroke limitation ● stainless
steel diaphragm chamber |
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Mounting of Valve Positioner
The valve positioner can easily be mounted
in the simple plug-on mode by which the air
supply connection and the stroke pick-up are
realised simultaneously. |
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| Encased ARCAPLUG stroke pick-up |
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Description of function
the ARCAPAQ actuator is designed for the operation
of control valves with a linear stroke. the
actuator spindle (8) is connected to the valve-spindle
by means of coupling device (9) which also
serves as a stroke indicator. The spindle
is guided in a solid slide bearing (6) and
sealed by a special packing-cum-wiper ring
(7). The diaphragm (4), supported by the diaphragm
plate (5) and connected to the actuator spindle
(8), divides the actuator housing (2) into
a pressure chamber and a spring chamber.
If the force of the air pressure surpasses
the force of the springs, the actuator spindle
(8) is moved and operates the control valve.
The air supply is realised through internalchammels
in the yoke (10). The ventilation of the spring
chamber is achieved by means of the spraywater-proof
protective cap (1). Altermatively, the spring
chamber is scavenged by the waste air of the
positioner. |
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