Tubing Connections
Type AV positioners are available with (Type AV_ _ _1_ _ _ and
AV_ _ _2_ _ _) or without (AV_ _ _ 0_ _ _) manifolds (see Fig. B-5).
The following outlines supply air information and describes the
piping connections.
1. Connect the required supply air to connection S (Fig. B-5).
NOTE: Maximum torque for ¼-NPT fittings is 13.6 Nm (10.0 ft-
lbs).
2. Based on the positioner type, perform one of the following
steps (Fig. B-5):
Figure B-5. Port Locations
Figure B-6. Direct Acting, Top Loaded,
Single Acting Tubing Example
Figure B-7. Reverse Acting, Top Loaded,
Single Acting Tubing Example
8 AVI and AV2 POSITIONERS | SOI/AV12 R E V. A
NOTE: The minimum supply pressure should be 34.4
kilopascals (5 pounds per square inch gauge) above the oper-
ating pressure required by the actuator.
• AV11 and AV15: Connect 20.7 to 103.4-kPa (3.0 to 15.0-psig)
instrument signal to connection I.
• AV12 and AV16: Connect 20.7 to 186.2-kPa (3.0 to 27.0-psig)
instrument signal to connection I.
• AV2: Connection I is not used and should be plugged. If it is
not plugged, do so at this time.
NOTE: Use liquid or paste pipe sealant to seal the connec-
tion. Maximum torque for ¼-NPT fittings is 13.6 Nm (10.0 ft-
lbs).
3. Connect the output ports 01 and 02 as required to pro-
vide the desired direction of rotation. Figures B-6, B-7, B-8
and B-9 show
a single acting tubing example, and Figure B-10 shows a
double acting tubing example.
NOTE: The piping arrangements shown in Figures B-6, B-7,
B-8, B-9 and B-10 are general examples and may not
reflect the arrangement required for the application.
4. Install -NPT permanent instrument gauges to the gauge
ports if desired or for calibration requirements.
For long-term, trouble free operation, it is recommended that
the supply air be of instrument quality and conform to the
ANSI/ISA-7.0.01-1996 standard, the particle size in the supply
line should not be greater that 3.0 microns.
CAUTION
Do not exceed the maximum supply pressure of 1034 kilo-
pas-cals (150 pounds per square inch gauge). Exceeding
this pressure could cause equipment damage.
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