Jordan Valve Mark 85 Series - Controlled Failure Temperature Regulator - Manual (Page 3)

-3-
Close shut-off valve on each side of the regulator. 1.
Remove the regulator from the line. 2.
Note the >< on the side of the valve body and cap. 3.
Secure the outlet body hex (1V) in a vise. Remove
the cap screws (17V, 20V) and lift the cap (2V)
straight up. Please note that there is an index pin
secure in the valve cap that fits in to the index pin
hole in the valve plate. (3V) This index pin is on the
same side as the >< on the valve cap and body,
and it positions the valve plate in valve body.
Before removing, check the valve disc (4V) for a
4.
stamped arrow. This arrow points to the >< and
the index pin hole in the valve plate. Since the disc
can be rotated 180 degrees in some sizes without
affecting the stroke adjustment, there may be no
arrow on the valve disc. Remove the valve disc and
place on bench with the lapped surface up.
A light tapping on the valve body is normally suf-
5.
ficient to loosen the pressure ring (5V) and plate
(3V). Invert the valve body while holding the pres-
sure ring and plate in place; then slowly let them
drop out of the body into your hand.
IMPROPER HANDLING OF THE SETS WILL RESULT
IN LEAKAGE OR IMPROPER CONTROL.
It is imperative that the disc pin (7V) is not rotated
when disassembling, cleaning, or reassembling,
since this affects the stroke adjustment of the valve.
Clean all the parts of the body and cap with sol- 6.
vent. The valve disc and plate then may be cleaned.
Place a piece of 4/0 polishing paper or jeweler’s
cloth on a smooth, flat surface such as a surface
plate and polish the lapped seating surfaces using
a figure eight motion. If the parts are scarred, do
not attempt to re-lap them. Return to the factory for
repair or replacement. If the seats are not scarred
deeply, they can be repaired many times at nomi-
nal cost.
The vertical milled sections of the valve cap serve
7.
as guide for the disc while stroking. A 0.005 feeler
gauge should be used to check the clearance
between the sides of the valve disc and the disc
guides. To do so, place the valve disc in the cap
with the lapped surfaces facing upward and check
this clearance. If the clearance is less than 0.005,
clean the sides of the disc guides with a smooth
file.
B. REASSEMBLY
Place the valve plate in the body seat recess. In 1.
replacing, be sure that he index pin hole is on the
same side as the >< on the valve body. Align the
disc pin so that it is centered in the body bore and
protrudes through the center slot of the valve plate.
Place the valve disc on the valve plate, engag-
2.
ing the disc pin. Be sure that the arrow which is
stamped on the disc points to the >< on the valve
body.
Note that the pressure ring has one lapped sur-
3.
face. In replacing the pressure ring, make certain
that the lapped surface faces the valve plate.
In replacing the valve cap, note that the >< on the
4.
valve cap and body must be in alignment. Use care
to insure that the disc guides and the index pin are
properly aligned with the valve disc and index pin
hole in the valve plate. Normally, a slight rotation
of the valve cap is sufficient to obtain proper align-
ment.
Install the cap screws and tighten uniformly, diago-
5.
nally from each other. See back page for torque
requirements.
Disc Pin Assembly
Remove the valve disc and valve plate (3V, 4V) fol- 1.
lowing the procedure outlined under “Valve Seats”
above.
Loosen the steam connector nut and bolt (10Y and
2.
11Y) and remove connector assembly (9Y).
Back out the four allen head yoke screws (2Y)
3.
which will allow the valve body (1V) to be sepa-
rated from the valve yoke (1Y).
Loosen the lower rod locknut (8V) and rotate the
4.
disc pin counterclockwise, pulling valve steam (9V)
upward while doing so. Do not remove the valve
stem completely 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 or-
5.
der following the procedures outlined under VALVE
SEATS and STROKE ADJUSTMENT.
Packing
Remove connector assembly (9V). 1.
Remove both packing flange nuts (16V). 2.
Remove packing flange (14V) and packing follower 3.
(13V).
Should packing spring (10V) not eject packing set,
4.
a slight amount of downstream pressure might be
necessary to remove the packing set.
Remove packing retainer (11V) and packing spring
5.
(10V).
Clean packing bore with solvent and blow out thor-
6.
oughly.
Assemble in reverse order and tighten packing nut
7.
(16V) so that packing follower (13V) bottoms out on
top of valve body.
Engage valve stem (9V) and actuator stem (8Y) with
8.
connector (9Y). Tighten connector nut and bolt. No
stroke adjustment is required.