Jordan Valve Mark 608BP - Balanced Plug Regulator - Manual (Page 3)

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2. Loosen the union nut (24) and separate the actua-
tor from the body.
3. Inspect the plug (11) and seat insert (26) to deter-
mine if replacement is required. Replace if there
are signs of wear or uneven seating on either part.
4. To replace the seat, simply unscrew it from the
body using a 7/8” thinwall socket wrench. Install
the new seat. An anti-seize compound applied to
the threads will aid in future removal.
5. To replace the plug, or aspirator (12), disassemble
the actuator as described in steps A2, A3, A4.
6. Remove the two screws (9) fastening the lever arm
bracket (8) to the diaphragm housing and lift out
the lever arm bracket with the lever.
7. Inspect aspirating hole in aspirator to be sure it is
clean. Remove and replace aspirator if stem guide
bores are worn. Remove and replace plug.
8. Remove the screws from the lever arm bracket and
clean the threads. Degrease with Loctite Primer T.
Also clean and degrease the tapped holes in the
diaphragm housing.
9. Remove the pin (10), replace the lever and reas-
semble with the screws.
10. Apply a drop of Loctite #290 to each screw and
reinstall the lever arm bracket. Align the slot in the
plug’s stem with the new lever arm and tighten the
pivot bracket’s mounting screws. Check for free
movement. Be certain that there is a gasket (29)
between the aspirator flange and the diaphragm
housing, and a gasket (30) in the body cavity where
the aspirator fits.
11. Re-attach body and actuator with the union nut (be-
ing careful to align the aspirator tube to the slot in
the body). Pull up hand-tight, then tighten further ¼
turn. (The union nut is 8-sided and may be used as
a guide).
12. If lever arm was replaced, apply 25-150 psi pres-
sure through outlet. This will set linkage and pre-
vent overpressure (in operation) from bending
the linkage and causing set point changes. Seat
leakage may be checked by observing any leakage
from inlet.
C. SPRING REPLACEMENT
1. To replace a spring, remove the cap (21) and the
adjusting screw (19). Then remove the spring.
CAUTION: If a different range spring is being
installed, be sure the proper adjusting screw is
used (the 3.5 psi range uses a different adjust-
ing screw.) Failure to observe this caution could
result in valve damage or failure to shut off. It is
recommended that a new tag be issued for this
valve with correct spring range.
2. Reinstall spring and adjusting screw. Adjust spring
per startup instructions. Replace cap.
D. DIAPHRAGM OR SPRING HOUSING REPLACEMENT
CAUTION: If the spring housing is to be replaced,
the lever must be replaced to insure shutoff.
1. Remove all pressure from the line as outlined un-
der WARNING.
2. Remove the compression of the spring (22) by ro-
tating the adjusting screw (19) counterclockwise.
3. Loosen the spring housing bolts (16) and remove
spring housing.
4. Remove diaphragm subassembly by sliding it away
from the valve body to disengage the lever arm (7).
5. Remove the two screws (9) fastening the lever arm
bracket to the diaphragm housing and lift out the
lever arm bracket with the lever arm.
6. Remove the screws from the lever arm bracket and
clean the threads. Degrease with Loctite Primer T.
Also clean and degrease the tapped holes in the
diaphragm housing.
7. Remove the pin (10), replace the lever arm and re-
assemble with the screws.
8. Apply a drop of Loctite #290 to each screw and
reinstall the lever arm bracket. Align the slot in the
plug’s stem with the new lever arm and tighten the
pivot bracket’s mounting screws. Check for free
movement.
9. Clean the flange surface on the diaphragm housing
and reinstall the diaphragm subassembly onto the
lever. (Assembly of a new diaphragm subassembly
is covered in A1 thru A7.)
10. If a new spring housing is being used, take the new
spring housing and carefully drive a new stop pin
(23) into the hole in the housing neck with a ham-
mer. (This serves as a spring adjusting screw stop
and must be installed.)
11. Clean the flange surface on the spring housing and
reinstall a new gasket (13). The gasket may be tem-
porarily held in place using a few dabs of grease.
12. Set the spring housing on top of the diaphragm
housing. Using a 6” screwdriver, or similar tool,
reach through the spring housing and push the
diaphragm down to align the diaphragm holes with
the housings’ holes.
13. Drop the bolts into place and attach the lockwash-
ers and nuts, finger-tight.
14. Continue to push the diaphragm down and snug-
up the bolts.
15. Evenly torque the bolts as described in Figure 3.
16. Apply 25-150 psi pressure through valve outlet.
This will set linkage and prevent overpressure in
operation from bending the linkage and causing
setpoint changes. Seat leakage may be checked by
observing any leakage from inlet.
Ordering Spare Parts
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