Instruction Manual

67C Series
5
to the lowest possible point on the spring case or
otherwise protect it.
Inspect the vent hole regularly to make sure it is not
plugged. Spring case vent hole orientation may be
changed by rotating the spring case with respect
tothebody.A1/4NPTspringcaseventmaybe
remotely vented by installing obstruction-free tubing
or piping into the vent. Protect the remote vent by
installing a screened vent cap on the remote end of
the vent pipe.
6. For use in regulator shutdown, install upstream
block and vent valves and downstream block and
vent valves (if required) or provide some other
suitable means of properly venting the regulator
inlet and outlet pressures. Install a pressure gauge
to monitor instruments on startup.
7. Applyagoodgradeofpipecompoundtotheexternal
pipe threads before making connections, making sure
not to get the pipe compound inside the regulator.
8. Installtubingttingorpipingintothe1/4NPT
inlet connection on the body (key 1) and into the
1/4 NPT body outlet connection.
9. The second 1/4 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Figures3through9.
1. With proper installation completed and
downstream equipment properly adjusted, slowly
open the upstream and downstream shutoff valve
(when used) while using pressure gauges to
monitor pressure.
!
WARNING
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 18), if used, and turning the
adjusting screw or handwheel (key 19) 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 sufcient 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.
!
WARNING
To avoid personal injury, property
damage or equipment damage caused
by sudden release of pressure or
explosion of accumulated gas,