Jordan Valve Mark 688 Series - Piloted Soft Seat Regulator - Manual (Page 6)

Torque Procedure
1. Install all bolts hand-tight.
2. Torque the bolts in order of the bolt pattern to
approximately 75 in.-lbs.
3. Re-torque each bolt to 300 in.-lbs., using the same
bolt pattern as shown.
9. Remove the pin (45), 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 (36)
between the guide flange and the diaphragm hous-
ing, and a gasket (37) 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.
Ordering Spare Parts
Use only genuine Jordan Valve parts to keep your valve
in good working order. So that we can supply the parts,
which were designed for your valve, we must know ex-
actly which product you are using. The only guarantee to
getting the correct replacement parts is to provide your
Jordan Representative with the valve serial number. This
number is located on the valve identification tag. If the
serial number is not available, the parts needed for your
valve might be determined using the following informa-
tion: Model Number, Valve Body Size, Seat Material and
Cv Rating, Spring Range and Set Point, Trim Material, Part
Name - Number and Quantity.
NOTE: Any parts ordered without a valve serial number
that are found to be incorrect are subject to up to a
minimum 25% restock charge when returned.
-2-
5
3
1
6 4
2
7
8
8 bolts
(or multiples)