Jordan Valve Mark 4150 Series Pressure Controllers - Manual (Page 5)

-5-
Mark 4160 Pressure Controller
The operation of Mark 4160 - proportional-reset control-
ler, is the same as the Mark 4150 with the addition of a
reset rate adjustment (L). Follow steps 1-6 from opera-
tion of the 4150 then proceed with the following:
1. In step No. 7, for the Mark 4160 the pressure will
flow through the three-way valve (K), to reset
valve (M) where a portion of pressure
will be diverted to the bellows (O).
2. The pressure will be built up in bellows (O)
pushing beam (B) to nozzle (C) and therefore
increased pressure to valve and to bellows (I).
This process will continue until control pressure
is equal to the set point.
3. The proportional bandwidth determines how
much the pressure will deviate from the
set point. The reset determines the amount of
time the deviation is away from the set point.
M
aIntenance
Two steps should be carried out in regular scheduled
maintenance. A cleaner button allows you to clean the
passages in the relay orifice. This button should be
pushed regularly. The second step is using the drain
cock that is located on the underside of the drip well in
the Mark 50 filter. This drip well, should be allowed to
bleed off to atmosphere to prevent moisture from con-
taminating the controller.
t
rouble
S
hootIng
1. The control valve continually cycling or hunting.
1.1. The constant cycling of a controller can
occur if the reset rate is set too
fast or the band setting is set too narrow.
1.2. Ensure that the controller valve plug is
not sticking.
1.3. A control valve always operating near its
seat will indicate an oversized control
valve.
2. Incomplete Pressure Change on the Diaphragm.
2.1. Ensure an accurate reading is being
displayed from the diaphragm pressure
gauge.
2.2. Verify that lines and connections are free
from leaks.
The Mark 4150/4160 Series Bourdon Tubes can be
replaced. They may be replaced due to changes in
pressure regulations or for maintenance.
Replacing Bourdon Tube
(Refer to Figure 6)
1. Detach the connecting link and bearing (Key 37)
from the beam.
2. Unscrew the two fixing screws (Key 8) holding
the tube. Detach tube from the sub-assembly.
3. Replace the Bourdon tube by removing the con-
necting link and bearing from the exist
ing tube. Attach the connecting link and
bearing on the new Bourdon tube.
4. Zero the pressure dial.
5. Install the Bourdon tube in the sub-assembly.
Reconnect the connecting link and bearing to
the beam.
6. Ensure that the tube is in a horizontal position
and that there is tension in the connect
ing link. The tension can be adjusted by bend-
ing the cross springs (Key 28).
7. Adjust and calibrate for start-up.
Replacing Bellows
(Refer to Figure 6)
1. Detach sub-assembly from controller.
2. Remove the connecting link and bearing (Key
37) from the beam.
3. Remove the bellows unit from the frame (Key 16)
4. Install the bellows in the control assembly. Begin
by ensuring that the beam is horizontal and with
the pressure setting dial at zero.
Then attach the connecting link and the bearing
link to bellows and beam. Ensure that there is
tension on the connecting link. Tension
can be added by bending the cross springs
(Key 28).
5. Adjust and calibrate for start up.
Calibration of Controllers
1. Move the calibration adjuster (Key 30, Figure 6)
to the right or the left.
2. Repeat the nozzle adjustment and step 5 for
proportional controller or step 6 for proportional-
reset controller.
3. To release the calibration adjuster, loosen the
two screws, above and below the beam,
to the left of the nozzle.
M
ark
4150
and
4160 S
erieS
P
reSSure
C
ontrollerS