Badger Meter SRD/SRI Valve Positioners - Manual (Page 33)

PNEUMATIC CONNECTIONS
Supply
Supply air pressure . . . . . . . 1.4 to 6 bar (20 to 90 psig)
Air supply. . . . . . . . . . . . . . . according to ISO 8573-1
- Solid particle size and density class 2
- Oil rate . . . . . . . . . . . . . . class 3
- Pressure dew point 10 K under ambient temperature
For air supply, we recommend the FOXBORO ECKARDT
FRS923 filter regulator.
Following alignment and mounting of the positioner to the
valve, pneumatic tubing has to be provided.
Explanation of abbreviatons:
s Supply air
y1-d Output 1 for direct mounting, depressurized at
currentless electronics. When using this output y1
has to be closed by means of hex. screw.
y1 Output 1, depressurized at currentless electronics.
When using this output, y1-d has to be closed by
means of sealing screw and O-ring.
y2 Output 2 for double-acting actuator. Full pressure at
currentless electronics. Closed at single-acting
actuator.
n1 Hex. Screw with NPT thread
Part No. 522 588 013 (stainless steel)
Part No. 556 446 016 (plastic)
n2 Sealing screw with O-ring
Unused pneumatic connections must be closed off.
FAIL SAFE POSITION FOR DOUBLE ACTING
Fail safe position of the double acting valve is given by the
fail safe action of the pneumatic of the positioner itself.
In case positioner is de-energized:
Output
Y1 is 0
Output Y2 is 100% of air supply pressure
Therefore do pneumatic piping of Y2 to the chamber of the
actuator that should be pressurized to do the requested fail safe.
In any case put air supply only when the output
Y2 is connected.
W A R N I N G
To avoid any personal injury resulting from bursting of parts, do
not exceed maximum supply pressure of positioner and actuator.
To avoid any personal injury or property damage from sudden or
fast movement, during air connection:
Do not put your finger or other part at any time inside the valve or
in any moving part of the actuator. Do not put your finger or other
part at any time in the feedback lever mechanism. Do not touch the
rear part of the positioner at any time. Connect air supply only after
connection Y1 and Y2 (for double acting) are done.
Pneumatic Connections
Page 33 August 2014 POS-UM-00010-EN-03