Startup And Adjustment; Maintenance - Emerson Fisher 67C Instruction Manual

7. Apply a good grade of pipe compound to the male
pipe threads before making connections, making sure
not to get the pipe compound inside the regulator.
8. Install tubing fitting or piping into the 1/4-inch NPT
inlet connection on the body (key 1) and into the
1/4-inch NPT body outlet connection.
9. The second 1/4-inch NPT outlet can be used for a
gauge or other use. If not used, it must be plugged.
Installing a 67CF Series Regulator in an
Existing Installation
When installing a 67CF Series regulator in an existing
installation, it may be necessary to use spacers
(key 34, figure 13) to adapt the installation. If the
mounting bolts are too long, place a spacer on the bolt
(see figure 13). To be sure the regulator is secure, the
bolts should have at least two full threads of
engagement.

Startup and Adjustment

Key numbers are referenced in figure 3 through 9.
1. With proper installation completed and down-
stream equipment properly adjusted, slowly open the
upstream and downstream shutoff valve (when used)
while using pressure gauges to monitor pressure.
To avoid personal injury, property
damage, or equipment damage caused
by bursting of pressure containing parts
or explosion of accumulated gas, never
adjust the control spring to produce an
outlet pressure higher than the upper
limit of the outlet pressure range for that
particular spring. If the desired outlet
pressure is not within the range of the
control spring, install a spring of the
proper range according to the diaphragm
parts maintenance procedure.
2. If outlet pressure adjustment is necessary,
monitor outlet pressure with a gauge during the
adjustment procedure. The regulator is adjusted by
loosening the locknut (key 19), if used, and turning the
adjusting screw or handwheel (key 18) clockwise to
increase or counterclockwise to decrease the outlet
pressure setting. Retighten the locknut to maintain the
adjustment position.
Shutdown
First, close the nearest upstream block valve and then
close the nearest downstream block valve (when
used). Next, open the downstream vent valve. Since
the regulator remains open in response to the
decreasing downstream pressure, pressure between
the closed block valves will be released through the
open vent valve.

Maintenance

Regulator parts are subject to normal wear and must be
inspected and replaced as necessary. The frequency of
inspection and replacement of parts depends on the
severity of service conditions and applicable codes and
government regulations. Open the Type 67CF, 67CFR,
67CFS, or 67CFSR drain valve (key 2) regularly to
empty accumulated liquid from the dripwell (key 5).
Note
If sufficient clearance exists, the body
(key 1) may remain mounted on other
equipment or in a line or panel during
maintenance unless the entire regulator
will be replaced.
To avoid personal injury, property
damage, or equipment damage caused
by sudden release of pressure or explo-
sion of accumulated gas, do not attempt
any maintenance or disassembly without
first isolating the regulator from system
pressure and relieving all internal
pressure from the regulator.
Type 67C, 67CR, 67CS, and 67CSR
Trim Maintenance
Key numbers are referenced in figures 3, 4 and 12.
1. Remove four bottom plate screws (key 3) from the
bottom plate (key 39) and separate the bottom plate
and O-ring (key 4) from the body (key 1).
67C Series
5