4195KA, KB, KC, and KS Controllers
Instruction Manual
Form 5207
April 2007
6-19
Replacing the Anti-Reset Windup (suffix
letter F) Differential Relief Valve
WARNING
Refer to the Maintenance WARNING
on page 6-1.
Refer to the 4195KB or 4195KC Series suffix letter F
portion of figure 7-1 for key number locations.
1. Loosen the two mounting screws in the
differential relief valve (key 55) and remove the relief
valve.
2. Inspect the O-rings on the replacement relief
valve. Apply a suitable lubricant to the O-rings.
3. Install the replacement relief valve into the
controller frame, keeping in mind that:
D When the arrow points up, the valve relieves
with decreasing output pressure.
D When the arrow points down, the valve relieves
with increasing output pressure.
4. Tighten the two screws that hold the relief valve
to the frame.
5. The relief valve differential pressure is factory-set
at 0.3 bar (5 psig). Maximum differential pressure is
0.5 bar (7 psig); minimum differential pressure is
0.14 bar (2 psig). If a different differential pressure
setting is desired, refer to the anti-reset windup
valve calibration procedure in Section 4.
Replacing the Anti-Reset Windup (suffix
letter F) Relief Valve Tubing Assembly
WARNING
Refer to the Maintenance WARNING
on page 6-1.
Refer to the 4195KB or 4195KC Series suffix letter F
portion of figure 7-1 for key number locations.
COURSE ZERO ADJUSTMENT
LINK 1
LINK 4 ADJUSTMENT
LINK 4
LINK 2
LINK 3
LINK 3 ADJUSTMENT
LINK 2 ADJUSTMENT
W5745 / IL
Figure 6-13. Bourdon Tube Controller Link
Locations and Adjustments
1. Remove the controller assembly from the case
by performing steps 1 through 3 of the case and
cover replacement procedure.
2. Loosen the nuts at both ends of the relief valve
tubing (key 44) and remove the tubing.
3. Install the replacement relief valve tubing, and
tighten the tubing nuts at both ends.
4. Apply the proper supply pressure to the
controller, cap the nozzle and check for leaks.
Remove the supply pressure.
5. Position the controller assembly in the case and
start, but do not tighten the nine mounting screws.
Slide the controller assembly down to assure an
O-ring seal at the pressure connections along the
bottom of the case. Hold the controller assembly in
place while tightening the nine mounting screws.
6. Perform the controller calibration procedures and,
if necessary, the appropriate remote set point
calibration procedure in Section 4.
7. Mount the controller as described in the
Installation section.
8. Connect the external piping to the controller.
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