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PRESSURE REDUCING SANITARY REGULATOR
I. DESCRIPTION AND SCOPE
Model 5381 is a pressure reducing regulator used to control downstream (outlet or P
size is 1/2" (DN15) with Tri-Clamp
Bulletin 5381-TB for specific design conditions and selection recommendations.
II. INSTALLATION
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.
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
THROUGH AN IN STALLED UNIT; ISO LATE FROM
TEST.)
INSTALLATION, OPERATION & MAINTENANCE MANUAL (IOM)
MODEL 5381
connections. The 5381 incorporates a stainless steel body. Refer to Tech ni cal
®
CAUTION
CAUTION
SECTION I
SECTION II
Supply
@ P
1
Blowdown-Drain
3. An outlet pressure gauge should be located
ap proxi 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 flow 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.
) pressure. Inlet and outlet
2
Model
5381
Recommended Piping Schematic
For Pressure Reducing Station
IOM-5381
02-20
Outlet
@ P
2
SRV
P
1
Bypass
Blowdown-Drain
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Summary of Contents for cashco 5381
- Page 1 PRESSURE REDUCING SANITARY REGULATOR SECTION I I. DESCRIPTION AND SCOPE Model 5381 is a pressure reducing regulator used to control downstream (outlet or P ) 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 ®...
-
Page 2: Principle Of Operation
(upstream) block (When on bypass, the system pressure must be valve. Close the outlet (downstream) valve only constantly observed and manually regulated. if reg u la tor re mov al is re quired. Close the outlet (down stream) block valve. IOM-5381... -
Page 3: Maintenance
(14) into body 4. Remove spring chamber (2), range spring re cess (none re quired for com po si tion (17) and spring button (5). di a phragm). Set di a phragm sub as sem bly into the body. IOM-5381... - Page 4 NOTE: When piston (15) assemblies are 12. Place the range spring (17) over the pres sure used with comp seats, Cashco, Inc. does plate nut (10) of the diaphragm subassembly. not rec om mend attempting to remove the 13. Apply a small amount of process compatible comp seat.
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Page 5: Troubleshooting Guide
No pressure relief protection. Install safety relief valve, or rupture disc. Restricted diaphragm movement. Assure no moisture in spring chamber at temperatures below freeze point. Assure no dust or debris entering vent opening. If rainwater or debris can enter, re-orient regulator. IOM-5381... -
Page 6: Section Viii
Cashco, Inc. does not assume responsibility for the selection, use or maintenance of any product. Responsibility for proper selection, use and maintenance of any Cashco, Inc. product remains solely with the purchaser. - Page 7 Figure 2: Basic Model 5381, Metal Seat Design Item No. Description Repair Kit B Item No. Description Repair Kit B Body Adjusting Screw Locknut Spring Chamber Diaphragm(s) ----------------------- ‡‡ Pressure Plate Diaphragm Gasket ---------------- ‡‡ Pusher Plate Pusher Plate O-ring---------------- ‡‡...
- Page 8 ATEX 2014/34/EU: Explosive Atmospheres and Cashco Inc. Products Cashco, Inc. declares that the products listed in the table below has been found to comply with the Essential Health and Safety Requirements relating to the design and construction of products intended for use in potentially explosive atmospheres given in Annex II of the ATEX Directive 2014/34/EU.
- Page 9 PRODUCT 31-B, 31-N 1164, 1164(OPT-45) 1171, 1171(OPT-45), 1171(CRYO) 2171, 2171(OPT-45), 2171(CRYO), 3171 1465, 3381, 3381(OPT-45), 3381(OPT-40) 4381, 4381(OPT-37), 4381(CRYO), 4381(OPT-45), 5381 MPRV-H, MPRV-L PBE, PBE-L, PBE-H CA-1, CA-2 CA1, SA1, CA4, SA4, CA5, SA5 DA2, DA4, DA5, DA6, DA8 DA0, DA1, DAP, SAP...
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