Cashco P7 - Manual

INSTALLATION, OPERATION & MAINTENANCE MANUAL (IOM) IOM-P7
11/13
SECTION I
I. DESCRIPTION AND SCOPE
The Model P7 is a 1/2" (DN15) or 3/4" (DN20) pressure reducing regulator used to control downstream (outlet or P
2
)
pressure. The unit is suitable for gaseous or liquid services. Refer to Technical Bulletin P7-TB for design conditions
and selection recommendations.
SECTION II
II. INSTALLATION
MODEL P7
PISTON SENSING SINGLE STAGE
PRESSURE REDUCING REGULATOR
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 outlet pressure gauge should be located ap prox-
i mately ten pipe diameters downstream, 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.
CAUTION A
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.
7. In plac ing thread seal ant on pipe ends pri or to
en gage ment, ensure that excess material is re-
moved and not allowed to enter the regulator upon
startup.
8. Flow Direction: Install so the fl ow direction match es
the inlet stamp on the main 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 spring loaded knob
(38) or loading dome (2) or ratio loading upper case
(44) in ver ti cal upwards position.
11. Regulators are not to be buried un der ground.
12. For insulated piping systems, recommendation is
to not insulate regulator.
Model P7