cashco P3 Installation, Operation & Maintenance Manual

ISO Registered Company
I. DESCRIPTION AND SCOPE
The Model P3 is a pressure reducing regulator used to control downstream (outlet or P
sizes 1/4" (DN8), 3/8" (DN10) and 1/2" (DN15). The unit is suitable for cylinder gaseous services. Refer to Techni-
cal Bulletin P3-TB for design conditions and selection recommendations.
II. INSTALLATION
Installation of adequate overpressure protection
is recommended to pro tect the regulator 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 outlet pressure gauge should be located ap-
proxi 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.
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 P3
TWO STAGE CYLINDER GAS
PRESSURE REDUCING REGULATOR
CAUTION
Strainers are rec om-
SECTION I
SECTION II
Recommended Piping Schematic
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 main regulator body (1).
9. For best performance, install in well drained hori-
zon tal pipe.
10. Basic Regulator - (Refer to Figure 2, Model P3):
Regulator may be rotated around the pipe axis
360°. Recommended position is with 2nd stage
knob (4) 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.
) pressure. Available in
2
For Pressure Reducing Station
IOM-P3
03/16