Emerson Fisher 67C Instruction Manual page 6

67C Series
2. Inspect the removed parts for damage and debris.
Replace any damaged parts.
3. To remove the valve cartridge assembly, grasp the
end of cartridge and pull it straight out of body (key 1).
Replace with new cartridge assembly. The cartridge
assembly may be disassembled and parts may be
cleaned or replaced. If the soft seat (key 15) was
removed, make sure it is properly snapped into place
before installing the valve cartridge assembly.
4. Check O-ring (key 14) for wear and replace, if
necessary. Apply lubricant to the O-ring and place in
the body. Align cartridge key to keyway in body and
insert. Reinstall the O-ring (key 4), secure the bottom
plate (key 39) with screws (key 3), and torque to 15 to
30 inch-pounds (1,9 to 3,9 N•m).
Diaphragm Maintenance
Key numbers are referenced in figures 3 and 4.
1. Back out the adjusting screw or handwheel (key 18)
until compression is removed from the spring (key 17).
2. Remove the spring case screws (key 3) to separate
the spring case (key 7) from the body (key 1). Remove
the upper spring seat (key 20) and spring (key 17).
3. Remove the diaphragm assembly (key 16), inspect
the diaphragm, and replace the assembly, if necessary.
4. Place the diaphragm assembly (key 16) on the
body (key 1) as shown in figure 3 or 4. Push down on
the diaphragm assembly to make sure the valve plug
(key 11) strokes smoothly and approximately
1/16-inch (2 mm).
In step 5, if installing a control spring of
a different range, be sure to delete the
spring range originally appearing on the
label and indicate the new spring range.
5. Stack the control spring (key 17) and upper spring
seat (key 20) onto the diaphragm assembly (key 16).
6. Install the spring case (key 7) on the body (key 1)
with the vent oriented to prevent clogging or entrance
of moisture. Install the six spring case screws (key 3)
using a crisscross pattern and torque to 15 to 30 inch-
pounds (1,9 to 3,9 N•m).
On Types 67CS and 67CSR, lubricate the
adjusting screw (key 18) thread to reduce
galling of the stainless steel.
6
Note
Note
7. When all maintenance is complete, refer to the
Startup and Adjustment section to put the regulator
back into operation and adjust the pressure setting.
Tighten the locknut (key 19) if used, and install the
closing cap (key 33) if used .
Types 67CF, 67CFR, 67CFS, and 67CFSR
Filter Element and Trim Maintenance
Key numbers are referenced in figures 5, 6, and 12.
1. Remove four dripwell screws (key 3) from the
dripwell (key 5) and separate the dripwell and O-ring
(key 4) from the body (key 1). The filter retainer (key 9),
thrust washer (key 37), filter element (key 6), and
gasket (key 26) may come off with dripwell. If not,
remove these parts.
2. Inspect the removed parts for damage and debris.
Replace any damaged parts. If a replacement is not
available, the filter element may be cleaned.
3. To remove the valve cartridge assembly, grasp the
end of cartridge and pull it straight out of body (key 1).
Replace with new cartridge assembly. The cartridge
assembly may be disassembled and parts may be
cleaned or replaced. If the soft seat (key 15) was
removed, make sure it is properly snapped into place
before installing the valve cartridge assembly.
4. Check O-ring (key 14) for wear and replace, if
necessary. Apply lubricant to the O-ring (key 14), then
align cartridge key to keyway in body and insert.
Reinstall the gasket (key 26), filter element (key 6),
thrust washer (key 37), and filter retainer (key 9).
Reinstall the O-ring (key 4), secure the dripwell with
screws (key 3), and torque to 15 to 30 inch-pounds
(1,9 to 3,9 N•m).
Diaphragm Maintenance
Key numbers are referenced in figures 5 and 6.
1. Back out the adjusting screw or handwheel (key 18)
until compression is removed from the spring (key 17).
2. Remove the six spring case screws (key 3) to
separate the spring case (key 7) from the body (key 1).
Remove the upper spring seat (key 20) and spring
(key 17).
3. Remove the diaphragm assembly (key 16), inspect
the diaphragm, and replace the assembly, if necessary.
4. Place the diaphragm assembly (key 16) on the body
(key 1) as shown in figure 4. Push down on the dia-