Regulator operation below the maximum pressure limitations
does not preclude the possibility of damage from external
sources or debris in the line. The regulator should be
inspected for damage after any overpressure condition.
startup
The regulator is factory set at approximately the midpoint
of the spring range or the pressure requested, so an initial
adjustment may be required to give the desired results.
With proper installation completed and relief valves properly
adjusted, slowly open the upstream and downstream
shutoff valves.
adjustment
note
For types that include the slam-shut module,
refer to the Instruction Manual for type VsX8
slam shut (D103127X012) for adjustment and
maintenance of the slam shut.
To change the outlet pressure, loosen the hex nut and turn
the adjusting screw clockwise to increase outlet pressure, or
counterclockwise to decrease it. Monitor the outlet pressure
with a test gauge during the adjustment. Tighten the locknut
to maintain the desired setting.
taking out of service (shutdown)
!
WarnIng
to avoid personal injury resulting from
sudden release of pressure, isolate the
regulator from all pressure before
attempting disassembly.
Figure 1.
Type CSB604 Downstream Control Line Installation
M1063
PrIMary rEgulator
slaM shut
uPstrEaM
BloCk ValVE
DoWnstrEaM
BloCk ValVE
MInIMuM oF 6 X outlEt
PIPIng DIaMEtEr
InlEt PrEssurE
outlEt PrEssurE
atMosPhErIC PrEssurE
Vent Line Installation
The CSB600 Series regulators have a 1 NPT screened vent
opening in the spring case. If necessary to vent escaping
gas away from the regulator, install a remote vent line in
the spring case tapping. Vent piping should be as short
and direct as possible with a minimum number of bends
and elbows. The remote vent line should have the largest
practical diameter. Vent piping on regulators with token relief
must be large enough to vent all relief valve discharge to
atmosphere without excessive backpressure and resulting
excessive pressure in the regulator.
For types with optional token relief, this low capacity relief
is located in the spring case of the primary regulator. If
necessary to vent escaping gas away, install a remote vent
line in the spring case tapping of the primary regulator as
described above.
Periodically check all vent openings to be sure that they are
not plugged or obstructed.
CSB600 Series outlet pressure ranges are shown
in Tables 7a, 7b, 7c and 7d. Outlet pressure higher than
0.34 bar / 5 psig above the setpoint may damage internal
parts such as the diaphragm head and valve disk.
the
maximum emergency (casing) outlet pressure for all
types is 4.0 bar / 58.0 psig except for type CsB650
which is 5.0 bar / 72.5 psig.
overpressure Protection
The recommended pressure limitations are stamped on
the regulator nameplate. Some type of overpressure
protection is needed if the actual inlet pressure exceeds the
maximum operating outlet pressure rating. Overpressure
protection should also be provided if the regulator inlet
pressure is greater than the safe working pressure of the
downstream equipment.
CSB600 Series
7
