Cashco SA4 - Manual

INSTALLATION, OPERATION & MAINTENANCE MANUAL (IOM) IOM-CA4/SA4
11-13
I. DESCRIPTION AND SCOPE
Models CA4/SA4 are pressure reducing regulators used to control downstream (outlet or P2) pressure. Sizes are
3/4" (DN20), 1" (DN25), 1-1/2" (DN40), and 2" (DN50). With proper trim uti li za tion, the unit is suitable for liquid or
gaseous service. (NOTE: This product was formerly identifi ed as a Model C4 or S4; a Model CA4/SA4 and C4/S4
are one and the same product.)
MODEL CA4/SA4
CA4 and SA4 - ULTRA HIGH PURITY, PRESSURE LOADED
PRESSURE REDUCING REGULATORS
SECTION I
II. REFERENCES
Refer to Technical Bulletin CA4/SA4-TB for tech ni-
cal specifi cations of a Model CA4/SA4 reg u la tor.
ABBREVIATIONS
CCW – Counter Clockwise
CW – Clockwise
ITA – Inner Trim Assembly
SECTION III
SECTION II
III. INSTALLATION
1. Install per direction of fl ow arrow indicated on
body, or "IN" and "OUT" markings.
2. Regulator may be rotated around pipe axis 360
degrees. For ease of maintenance, the rec om-
mend ed orientation is with the loading chamber
(4) upwards.
3. Provide space below, above, and around reg u la tor
for removal of parts during maintenance.
4. Install block valves and pressure gauges to pro-
vide means for adjustment, operation, bypass, or
removal of the regulator. A UHP fi lter is rec om-
mend ed before inlet to remove typical pipe line
debris from entering valve and damaging internal
“soft goods”, primarily the dynamic seal and valve
seat.
CAUTION
Installation of adequate overpressure pro tec tion
is recommended to pro tect the reg u la tor and all
downstream equip ment from dam age in the event
of reg u la tor failure.
CAUTION
DO NOT HYDROSTATIC TEST THROUGH AN
IN STALLED UNIT; ISOLATE REGULATOR FROM
TEST. The "Outlet" rating as printed on the
nameplate is the rec om mend ed “upper op er at-
ing limit” for the sens ing di a phragm. Higher
pres sures could cause internal dam age. In ad-
di tion, note on the nameplate that the Inlet and
Outlet pres sure and temperature ratings are at
different levels.
Recommended Piping Schematic
for Pressure Reducing Station