Jordan Valve Mark 608 Series – Low-Pressure Gas/Tank Blanketing Regulator - Manual (Page 3)

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Main Valve
All operations can be performed with the valve in the
line.
Replacing the Main and Balance
Diaphragms
1. Remove the closing cap (1).
2. Thread the adjusting screw (2) out of the spring
tube.
3. If the set range is in psi, remove the upper spring
guide (not shown).
4. Remove range spring (3).
5. Remove the actuator flange bolts (8) and nuts (9).
6. Remove the upper case (5).
7. Insert special tool (Jordan Part Number 15522) into
the inlet of the valve and engage the hole in the
lower stem (23).
8. Loosen the diaphragm bolt (17).
9. Remove the spring guide (4), diaphragm plate
(6), main diaphragm (7), seal washer (30), and the
thread seal washer (31). Discard the main dia-
phragm.
10. Remove the ring nut (11), the lower diaphragm case
(10), and stem bushing (13), and o-ring (12). Jordan
recommends that the stem bushing and o-ring be
discarded and replaced with new parts when this
maintenance is performed.
11. Loosen hex bolts (26) and lockwashers (27). Re-
move the bonnet (14), two o-rings (24), and the
bonnet plate (15). Jordan recommends that these
o-rings be discarded and replaced with new parts
when this maintenance is performed.
12. Using the adjusting tool in the inlet of the valve, re-
move the upper stem (29) with tool number 70080-
111.
13. Remove the balance diaphragm plate (28), balance
diaphragm (25), and the thread seal washer (31).
Discard the balance diaphragm.
14. Using new replacement parts, reverse the above
procedure to reassemble. Lubricate o-rings prior
to installation with a suitable lubricant such as Dow
Corning #4 grease. Save the special tools provid-
ed with the repair kit for future use.
Plug & Seat Replacement
1. Perform all steps in the section on replacing main
and balance diaphragms.
2. Use seat removal tool (Jordan Part Number 15533-
110) to remove the seat (22), and the lower stem,
plug and seat (17,18,19,20,23).
3. Remove the seat o-ring (21). Jordan recommends
that this o-ring be discarded and replaced with a
new one when this maintenance is performed.
4. Install the new lower stem (17,18,19,20,23), plug
and seat assembly into the body.
5. Lubricate the new seat o-ring (21) prior to installa-
tion with a suitable lubricant such as Dow Corning
#4 grease. Install the o-ring (21) over the threads
and on to the seat (22).
6. Install the seat (22) over the lower stem (23). Care-
fully thread it into the body (16).
7. Use the seat removal tool to tighten the seat. Do
not over tighten! Compressing the seat o-ring into
the body bore is all that is required to produce a
seal.
8. Proceed to stem 14 in the section on replacing
main and balance diaphragms.
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; Plug Material and
Seat Size; Spring Range or Set Point; Trim Material; Part
Name - Number and Quantity (see parts list chart).
NOTE: Without a valve serial number, any parts ordered
incorrectly are subject to a minimum 25% restocking
charge when returned.