CVS Controls Ltd
Product Manual: CVS Type 67AFR Filter Regulator
2
Specifications
Body Size and End Connection Style
1/4-inch NPT screwed
Maximum Allowable Inlet Pressure
250 psig (17 bar)
Outlet Pressure Ranges
3 to 100 psig (0.21 to 6.9 bar) available in four ranges. Refer to
Parts List Key 5
Maximum Emergency Outlet Pressure
50 psig (3.4 bar) over outlet pressure setting, or 110 psig (7.6
bar), whichever is greater
Pressure Registration
Internal
Standard Elastomers
-29 to 66
C (-20 to 150
F)
Material Temperature
Capabilities
High Temperature Elastomers
-18 to 188
C (0 to 350
F)
Installation continued
As with many regulators, the outlet pressure rating
on the CVS Type 67AFR Filter Regulator is lower
than the inlet pressure rating. If it is possible for
the actual inlet pressure to exceed the regulator
outlet pressure setting or the pressure ratings of
any downstream equipment, downstream over-
pressure protection is required. The low-capacity
internal relief feature of the CVS 67AFR provides
some limited downstream overpressure protection
but should not be relied upon to completely
safeguard against overpressure.
Debris in the service line or other external
conditions may cause damage to the regulator
even while it is operating within normal set
pressure ratings. Regular inspection should be
scheduled in addition to inspections after any
overpressure condition.
Note
If the regulator has been installed on another
unit prior to shipping, perform the
installation according to the instruction
manual for that unit.
For CVS Type 67AFR regulators shipped
separately, check the regulator, tubing and piping
for damage. Remove any foreign material. Install
the regulator ensuring that flow is from the IN to
the OUT as marked on the regulator body. Refer
to Figure 2 for cutout dimensions for a panel
mounted regulator.
To use the unit in regulator shutdown, properly
vent the regulator inlet and outlet pressures by
installing upstream and downstream vent valves
or providing some alternate means of properly
venting the inlet and outlet pressures.
For optimum filter drainage, position the drain
valve (Key 11) at the lowest possible point on the
filter cap (Key 9). Prevent plugging of the spring
case vent and keep the spring case from
collecting moisture, corrosive chemicals or other
materials by orienting the vent to the lowest
possible point on the spring case.
To change the filter/drain orientation, rotate the
filter cap with regards to the regulator body.
Change the spring case/vent orientation by
rotating the spring case in relation to the regulator
body.
Any CVS type 67 AFR Filter Regulator with a
tapped spring case can be vented remotely by
installing tubing or piping into the ¼-inch NPT vent
tapping. Install a screened vent cap in the end of
the tubing or piping to prevent clogging.
If using piping, apply pipe compound to threads
then proceed with making the connections. First
install the piping or tubing into the ¼-inch NPT
inlet connection. Unless the outlet connection has
been made at the factory to another unit, install
the piping or tubing to the outlet connection.
Warning
Never adjust the control spring to produce
pressure beyond its highest outlet pressure
range. Over pressuring the spring can cause
bursting of pressure containing parts, or
explosion of accumulated gas. If the range of
the control spring does not reach the desired
outlet pressure install a spring with the
proper range according to the maintenance
section.