Jordan Valve Mark 33 Series – Boiler Feedwater Control Valve - Manual (Page 3)

Stem & Disc Pin Replacement
Remove the valve disc and the valve place, following 1.
the procedure outlined under VALVE SEATS.
Loosen the stem connector nut and bolt and remove
2.
connector assembly.
Back out the four allen head screws which will allow
3.
the valve body to be separated from the valve yoke.
Loosen the stem locknut and rotate the disc pin
4.
counter-clockwise, pulling the valve stem upward
while doing so. Do not remove the valve stem com-
pletely, but raise it sufficiently so that the disc pin
may be removed by pulling up and out.
Replace the disc pin and reassemble in reverse
5.
order following the procedure outlined under VALVE
SEATS and STROKE ADJUSTMENT.
Packing
Remove connector assembly. 1.
Remove both packing flange nuts. 2.
Remove packing flange and packing follower. 3.
Remove packing retainer and the packing spring. 4.
Clean the packing bore with solvent and blow out 5.
thoroughly.
Assemble in reverse order and tighten the packing
6.
nut so that the packing follower bottoms out on top
of the valve body.
Engage the valve stem and actuator stem with con-
7.
nector. Tighten connector nut and bolt. No stroke
adjustment is required.
Valve Stroke Adjustment
The valve stroke is set at the factory and no field adjust-
ments are necessary. The position of the seats can be
adjusted by starting from the normally open position
(when the orifice in the plate and in the disc are per-
fectly aligned). For direct acting service, adjust the motor
rotation to the full CCW position (as viewed from the
power end). For reverse acting service, adjust the motor
rotation to the CW position. If the seats are not properly
full open, loosen the nut that locks the actuator stem to
the rod end bearing and loosen the stem connector as-
sembly just enough to rotate the actuator stem. Carefully
thread the actuator stem in or out of the rod end bearing
until the seats are full open. If further adjustments are
necessary, consult factory.
Motor Replacement
If it becomes necessary to change motors, the following
procedure should be followed:
Remove the valve from the line. 1.
Remove socket head crew and lockwasher. 2.
Important: Note position of lobe of the cam on the
motor shaft. Do not attempt to remove the socket set
screws.
Remove the four motor mounting bolts, lockwashers, 3.
and nuts.
Slide motor back off of mounting plate.
4.
Install new motor on mounting plate. 5. Important -
make sure cam is in the same lobe position as
described in step 2.
Replace and tighten mounting bolts, lockwashers,
6.
and nuts.
Replace and tighten socket head screw and lock-
7.
washer on motor shaft.
Check valve stroke as described in STROKE ADJUSTMENT.
8.
Motor Maintenance
The drive motor and gear train are immersed in oil and
sealed in a die cast enclosure, and thus periodic main-
tenance is not required. Field repairs must not be made.
Replacement actuators may be obtained through the
nearest Jordan Valve representative. When ordering a re-
placement actuator, specify product model number and
serial number as shown on the valve name plate.
Troubleshooting
If you experience erratic control:
Oversizing causes cycling and hunting, and reduces •
the rangeability of the valve. Make certain that your
sizing is correct.
Steam traps downstream may require maintenance.
•
Safety valve may be defective and need repair. •
There may be excessive foreign matter on the seats, •
and seats should be removed and cleaned. Valve
stroke may been readjustment.
Valve disc may not be moving freely. Check disc
•
guide clearance and correct if needed.
If valve will not operate:
Electric power may be off or there may be a loose •
connection.
There could be a defective control device.
•
The motor actuator may be defective and require •
replacement.
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. By furnishing the following
information with your order, you will prevent delays and
errors: Serial number of your existing valve; Model num-
ber; Body size; Body material; End connections (flange
rating if applicable; Part name and quantity (see chart on
back page).