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3610J and 3620J Positioners
MINOR LOOP
GAIN ADJ
Positioner Disassembly
Removing the Positioner from the
Actuator
Refer to figure 28 or 29 for key number locations,
unless otherwise indicated, while removing the
positioner from the actuator.
1. Unscrew the four socket head screws (key 54),
and remove the positioner from the actuator or
positioner adaptor (key 113—the positioner adaptor
is used only on selected actuator types and sizes).
2. Release all pressure to the positioner. Disconnect
the supply, instrument, and output tubing.
If using gas as the supply medium,
WARNING!
ensure adequate ventilation and remove any ignition
sources.
3. Unscrew the four captive cover screws and
remove the cover (key 41).
30
RELAY
ZERO ADJ
SUMMING BEAM
FLAPPER
NOZZLE
FIXED
CAVITY A
RESTRICTION
CAVITY B
MAGNET
COIL 4 TO
SUPPLY
20 mA INPUT
END VIEW OF ROTARY SHAFT
38A6594-A
B2149 / IL
Figure 23. Schematic of the 3620JP Positioner
CROSS-OVER
ADJ
RELAY
A
B
RANGE SPRING
COARSE
SPAN
ADJ
COUNTER SPRING
PIVOT A
INPUT MODULE
FLAPPER
NOZZLE
FIXED
RESTRICTION
4. For the 3611JP or 3621JP mounted on a 585 or
585R, size 100 with a 51- through 102-mm (2-
through 4-inch) travel only, disconnect the extension
spring (key 185) from the feedback lever.
5. Unscrew the four socket head screws (key 54),
and remove the positioner from the actuator or
positioner adapter (key 113—the positioner adapter
is used only on selected actuator types and sizes).
Disassembling the Bypass Valve
Refer to figure 26 for key number locations while
disassembling the bypass valve.
1. Remove all pressure from the positioner.
Disconnect the supply, instrument, and output
tubing.
WARNING!
medium, ensure adequate ventilation and remove
any ignition sources.
Instruction Manual
RELAY BEAM
AIR
SUPPLY
FINE
SPAN
ADJ
PIVOT
B
FEEDBACK
LEVER
POSITIONER
CAM
PISTON
ACTUATOR
If using gas as the supply
June 2008
SUPPLY PRESSURE
NOZZLE PRESSURE
INPUT SIGNAL
OUTPUT SIGNAL
OUTPUT SIGNAL
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