KIESELMANN GmbH | Operating instruction
Function and operation | 5
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Description of function for pneum. valves
The valve opens and closes by way of a pneum. multiturn actuator with a rotary movement of 90°.
normal closed (NC)
• pneum. OPERATED
• not pneum. OPERATED
opens the valve
spring force closes the valve
normal open (NO)
• pneum. OPERATED
• not pneum. OPERATED
closes the valve
spring force opens the valve
double acting (DA)
• pneum. OPERATED
the valve opens or closes according to control
5.2 Control system and position indication
Retrofitting to end position feedback for manually operated valves
By replacing the hand lever and the catch disc the valve can be retrofitted for end position feedback
(proximity switch).
Conversion from manual operation to pneumatic actuation
By a simple retrofitting operation the valve can be converted to pneumatic actuation. The rotary ac-
tuator for this purpose is supplied complete with fitting device. The following actuators are avail-
able, depending on the desired actuating function.
Nominal dia-
meter
Pneum. actu-
ator
air open - air close (DA)
Normally closed (NC)
DN25 - DN80
1“ - 3“
PDA 90/100
4100 080 100-022
4200 080 100-022
DN 100
DN 4“
PDA 90/125
4100 100 125-022
4200 100 125-022
Position indicator with sensor mounting for feedback signal.
The actuator is equipped with a proximity switch mounting (sensor mounting) and a position indica-
tion. When inductive proximity initiators M 12x1 are installed, the current "Open" or "Shut" position
can be interrogated. By screwing the proximity initiator to the limit position the required switching
gap for the signal transmission is established.. When the valve is closed the position indication is
oriented vertically to the direction of valve passage. When the valve is open it is oriented parallel to
the valve passage.
Feedback unit -optional-
Optionally, modular valve control head systems can be installed to the actuator for reading and ac-
tuating valve positions. The standard version is a closed system with SPS or ASI-bus switch-on
electronics, and integrated 3/2-way solenoid valves. For tough operating conditions we recommend
employing a high-grade steel cover.
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