Jordan Valve Mark 82 Series – Internal Piloted Temperature Regulator - Manual (Page 4)

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by releasing the spring compression (by rotating the
adjusting wheel downwards) and removing the four
fi llister head actuator screws (39).
Lift out the upper spring guide (41) and pilot stem
3.
(33). If necessary to replace pilot stem, remove the
upper locknut (40) and unscrew the upper spring
guide. Count the number of turns required to re-
move the upper spring guide. Replace the upper
spring guide on the new pilot stem, using the same
number of turns that were used to remove it. Lock it
in position, using the upper locknut (40).
After removing the upper spring guide assembly, the
4.
adjusting spring (31) may be removed. Replace if
necessary and replace the upper spring guide as-
sembly.
Place the thermal system onto the cage (11) and
5.
reinsert the four actuator screws. The valve stroke
adjustment will not be affected if these steps are
carefully followed.
Replacement of Main Valve Diaphragm
Remove the inlet pilot tube (25) and outlet pilot tube 1.
(26). Follow the procedure outlined under Valve
Seats and remove the valve disc and plate.
Unscrew the bottom cap (20) and remove the lower
2.
spring (22) and lower spring guide (21).
Remove the bonnet screws (29) and lift the bonnet
3.
assembly from the main valve body (6).
The diaphragm (30) can now be removed and re-
4.
placed if necessary.
Remove the diaphragm plate (32).
5.
To remove the disc pin (4), unscrew the stem lock- 6.
nut (18) and the disc pin from the valve stem (5).
The stem can now be removed upward through the
body fl ange.
The disc pin is removed through the valve body
7.
base.
Reassemble in reverse order. Insert the stem
8.
through the body fl ange and disc pin into the body
bore.
Thread the stem into the locknut and then into the
9.
disc pin approximately ¼”.
Place the main diaphragm plate (32) on the valve
10.
stem.
Replace the main diaphragm, making sure that it is
11.
installed properly in the recess of the valve body.
Place the valve bonnet assembly on the valve body
12.
and tighten cap screws uniformly to approximately
120 inch/pounds torque.
Insert the return spring guide (21) and the return
13.
spring (22) in the bottom cap (20) making certain
that the spring guide engages the disc pin properly.
A stroke adjustment will be required. Please not the
14.
procedure outlined under Valve Seats, Reassembly.
Replace the inlet pilot tube and outlet pilot tubes.
15.
Replacement of Stem Packing
Turn adjusting wheel (35) until all spring compres- 1.
sion is removed.
Completely unthread the ring nut (23).
2.
Lift off entire top assembly, being careful to avoid 3.
the trapped steam which will now escape. Examine
the pilot stem (33) for dirt.
Remove packing nut (13) and packing gland (14).
4.
Remove pilot seat (12) and examine the Tefl on ring 5.
for foreign matter which might prevent the pilot stem
from seating properly.
In the direct acting regulator, the lower end of the pi-
6.
lot stem is the seating surface. In the reverse acting
regulator, the lower pilot stem is separate from the
pilot stem and is removed after the pilot seat.
Replace packing (15) and o-ring (16).
7.
Reassembly in reverse order. 8.
Thermometer
If the regulator is equipped with a dial thermometer, it can
be re-calibrated by holding the pointer hub with a screw-
driver and moving the pointer to the correct temperature.
Torque
Torque Requirements for Body Bolts
Valve Size Torque (in./lbs.)
1/4” & 3/8” 70
1/2” & 3/4” 110
1” & 1-1/4” 120
1-1/2” 140
2” 140
Ordering Spare Parts
Use only genuine Jordan Valve parts to keep your valve
in good working order. So we can supply the parts, which
were designed for your valve, we must know exactly which
product you are using. The only guarantee to getting the
correct replacement parts is to provide your Jordan Rep-
resentative with the valve serial number. This number is
located on the valve identifi cation tag. If the serial number
is not available, the parts needed for your valve might be
determined using the following information: Model num-
ber, Valve Body size, Plug Material and Seat Size, Spring
Range or Set Point, Trim Material, Part Name - Number
and Quantity (see parts list chart).
Note: Without a valve serial number, any parts ordered
incorrectly are subject to a minimum 25% restock charge
when returned.