Cashco 5381 User Manual
Model 5381, Pressure reducing sanitary regulator, I. description and scope ii. installation
INSTALLATION, OPERATION & MAINTENANCE MANUAL (IOM)
IOM-5381
12-13
MODEL 5381
PRESSURE REDUCING SANITARY REGULATOR
SECTION I
Model 5381 is a pressure reducing regulator used to control downstream (outlet or P
2
) pressure. Inlet and outlet
size is 1/2" (DN15) with Tri-Clamp
®
connections. The 5381 incorporates a stainless steel body. Refer to Tech ni cal
Bulletin 5381-TB for specifi c design conditions and selection recommendations.
I. DESCRIPTION AND SCOPE
II. INSTALLATION
1. An inlet block valve should al ways be installed
upstream of the regulator.
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.
The maximum outlet pressure is list ed on the name-
plate as the upper range spring pres sure level, and
is the rec om mend ed “upper operative limit” for the
sens ing diaphragm (see Sec tion IV. Startup, Step
7). Higher press ures could dam age the di a phragm.
(Field hydro static tests fre quent ly destroy dia-
phragms. DO NOT HYDRO STATIC TEST THRU AN
IN STALLED UNIT; ISO LATE FROM TEST.)
Recommended Piping Schematic
For Pressure Reducing Station
3. An outlet pressure gauge should be located ap prox-
i mately ten pipe diameters downstream, and with in
sight.
4. All installations should include a downstream re lief
device if the inlet pressure could exceed the pres sure
rating of any downstream equip ment or the maximum
outlet pressure rating of the unit.
5. Flow Direction: Install so the fl ow direction match es
the arrow stamped on the regulator body.
6. Install in well drained hori zon tal pipe, properly trapped
with spring chamber (2) in the vertical position to allow
for proper draining.
SECTION II
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
Supply
@ P1
Model
5381
Outlet
@ P2
SRV
Bypass
Blowdown-Drain
Blowdown-Drain
P
1