Jordan Valve Mark 44 Series – Adjustable Cam - Manual (Page 2)

Stem O-Ring Replacement
Remove all pressure from the line as outlined in 1.
“Warning” under the Maintenance Section.
Remove the low flow end stop set screw (32) and
2.
rotate the rocker (23) to disengage the stroke stop
bearing (13).
Remove the four (4) cap screws (8) and lift the bon-
3.
net (6) off of the body (1).
Using a blunt pin punch, drive out the roll pin (15)
4.
and thread the stroke stop (12) off of the stem (4).
Push the threaded end of the stem into the bonnet
5.
and remove the stem from the cage end of the bon-
net. (The cage end is the portion of the bonnet that
is normally in the body).
Remove the o-ring, and clean the stem and the bore
6.
in the bonnet where the o-ring operates. Inspect
the bore for any scratches that might damage the
o-ring.
Lubricate the new o-ring with DOW CORNING #4 or
7.
any other lubricant that is suitable for use with the
o-ring material and your product at your operating
temperature.
Install the o-ring onto the stem from the threaded
8.
end so that the stem flow profile does not cut the
o-ring.
Carefully reinstall the stem back into the bonnet
9.
from the cage end.
Remove the seat from the body and place it over the
10.
end of the stem. Hold the bonnet upright and take
the body and place it over the bonnet and install the
bonnet into the body. Continue the reassembly of
the valve in the reverse order that you disassembled
it and then torque the cap screws according to the
Torque Procedure Section.
Seat or Seal Replacement
If the seat or stem is to be replaced it is strongly rec- 1.
ommended that the body/bonnet o-ring and stem
o-ring be replaced also. Therefore follow step A to
replace both o-rings.
While the stem is out of the bonnet, remove the re-
2.
taining ring and install it onto the new stem. Other-
wise follow the steps in A.
Bearing (Stroke Stop) Replacement
Remove all pressure from the line as outlined in 1.
“Warning” under the Maintenance Section.
Remove the low flow end stop set screw (32) and
2.
rotate the rocker (23) to disengage the stroke stop
bearing (13).
Using a blunt pin punch, drive the roll pin (15) out of
3.
the bearing (13).
Replace the bearing and reassemble in reverse or-
4.
der.
or replace.
If there is external leakage:
Stem or bonnet o-ring (9) or (5) defective. Replace. 
Maintenance
Routine maintenance should be expected due to nor-
mal wear and tear, damage from external sources or de-
bris. The regulator components, especially the moving
and sealing parts, should be inspected periodically and
replaced as necessary. Frequency of inspection/replace-
ment depends upon severity of conditions, but may also
be required by local/state/federal law or industry stan-
dards.
Warning: Be sure that there is no pressure in the
valve before loosening any fittings or joints. The
following steps are recommended.
Close inlet shut-off valve and by-pass valve. 1.
Allow pressure to bleed off through the downstream 2.
piping.
When pressure gauge indicates that there is no pres-
3.
sure in the valve, it may be serviced or removed.
Refer to the drawing for proper orientation of parts and
nomenclature.
Body/Bonnet O-Ring
Remove all pressure from the line as outlined in 1.
“Warning” above.
Remove the low flow end stop set screw (32) and
2.
rotate the rocker (23) to disengage the stroke stop
bearing (13).
Remove the four (4) cap screws (8) and lift the bon-
3.
net (6) off of the body (1).
Remove the o-ring and clean the mating surfaces on
4.
the body and bonnet. Inspect these surfaces for any
scratches or defects that could cause seal leakage.
Lubricate the new o-ring with DOW CORNING #4 or
5.
any other lubricant that is suitable for use with the
o-ring material and your product at your operating
temperature.
It is strongly recommended that the stem o-ring (9)
6.
also be replaced if the valve has been disassembled.
If you are going to replace it, proceed to section B,
step 4, otherwise go on to step 7 below.
Remove the seat from the body and place it over the
7.
end of the stem. Hold the bonnet upright and take
the body and place it over the bonnet and install the
bonnet into the body. Continue the reassembly of
the valve in the reverse order that you disassembled
it and then torque the cap screws according to the
“Torque Procedure” at the end of this manual.
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