cashco B7 Installation, Operation & Maintenance Manual

ISO Registered Company
I. DESCRIPTION AND SCOPE
The Model B7 is a back pressure regulator used to control upstream (inlet or P
sizes 1/2" and 3/4" (DN15 and DN20) with FNPT, Flanged ends or Tri-Clamp connections. The unit is suitable
for gaseous service. Refer to Technical Bulletin B7-TB for design conditions and selection rec om men da tions.
This is not a safety device and must not be substituted for a code approved pressure safety relief valve
or a rupture disc.
II. INSTALLATION
Installation of adequate overpressure pro tec tion
is recommended to pro tect the reg u la tor from
over pres sure and all down stream equip ment from
dam age in the event of regulator failure.
1. An inlet block valve should always be installed.
2. If service application is continuous such that
shut down is not readily accomplished, it is rec-
ommended that an inlet block valve, outlet block
valve, and a manual bypass valve be installed.
3. Pipe unions should be installed to allow removal
from piping.
4. An inlet pressure gauge should be located ap-
proxi mately ten pipe diameters upstream, and
within sight.
5. All installations should include a downstream
re lief de vice if the inlet pressure could exceed the
pres sure rating of any downstream equip ment or
the maximum outlet pressure rating of the unit.
6. Clean the pip ing of all foreign material including
chips, welding scale, oil, grease and dirt before
installing the reg u la tor. Strainers are rec om-
mend ed.
7. In plac ing thread seal ant on pipe ends pri or to
en gage ment, ensure that excess material is
INSTALLATION, OPERATION & MAINTENANCE MANUAL (IOM)
MODEL B7
BACK PRESSURE REGULATOR
SECTION l
SECTION II
CAUTION
CAUTION
Recommended Piping Schematic for Back Pressure Regulator
re moved and not allowed to enter the regulator
upon startup.
8. Flow Direction: Install so the flow direction
match es the inlet stamp on the regulator body
(1).
9. For best performance, install in well drained
hori zon tal pipe.
10. Regulator may be rotated around the pipe axis
360°. Recommended position is with knob (20)
or adjusting screw (14) ver ti cal upwards.
11. Regulators are not to be buried un der ground.
12. For insulated piping systems, recommendation
is to not insulate regulator.
IOM-B7
03/16
) pressure. Available in
1