INSTALLATION, OPERATION & MAINTENANCE MANUAL (IOM)
IOM-1465
12-13
MODEL 1465
PRESSURE REDUCING REGU LA TOR
SECTION I
I. DESCRIPTION AND SCOPE
The Model 1465 is a high pressure reducing reg u la tor designed primarily for analytical sampling and low fl ow ap-
plications. Size is 1/4" (DN8). With proper trim utilization, the unit is suitable for liquid and gaseous ser vice. Refer to
Technical Bulletin 1465-TB for design conditions and se lec tion rec om men da tions. NOT FOR DEAD END SER VICE.
SECTION II
II. INSTALLATION
CAUTION A
Do not dead end (no fl ow demand) down stream of
the regulator. The inlet pres sure will transmit past
the metal seat (not positive shut-off) and equal ize
on the down stream. This will lead to di a phragm
failure, regulator mal func tion, and pos si ble dam age
to sys tem in stru men ta tion down stream.
CAUTION B
For welded installations, all internal trim parts,
seals and diaphragm(s) must be removed from
reg u la tor body prior to welding into pipeline. The
heat of fusion welding will dam age non-metallic
parts if not re moved. NOTE: This does not apply to
units equipped with ex tend ed pipe nip ples.
1. An inlet block valve should always be in stalled.
2. If service application is continuous such that
shut down is not readily accomplished, it is rec om mended that an inlet block valve, outlet block
valve, and a manual bypass valve be in stalled.
3. Pipe unions should be installed to allow re mov al
from piping.
4. An outlet pressure gauge should be located ap prox i mate ly ten pipe diameters down stream, and
within sight.
5. All installations should include a downstream re lief device if the inlet pressure could exceed the
pressure rating of any down stream equip ment or
the max i mum outlet pressure rating of the unit.
Bypass
Outlet
@ P2
Sup ply
@ P1
SRV
Model 1465
Reducing
Regulator
Recommended Piping Schematic
for Pressure Reducing Station
CAUTION C
Installation of adequate overpressure pro tec tion
is rec om mend ed to pro tect the reg u la tor and all
down stream equip ment from dam age in the event
of reg u la tor failure.
6. Clean the piping of all foreign material in clud ing
chips, welding scale, oil, grease and dirt before
installing the regulator. Strainers are rec om mended.
7. In placing thread sealant on pipe ends prior to
en gage ment, ensure that excess material is
re moved and not allowed to enter the reg u la tor
upon startup.
8. Flow Direction: Install in accordance with the
fl ow di rec tion arrow cast on the body. The inlet
pres sure is con nect ed to the bottom connection
and the outlet (reduced) pressure is connected
to the side connection. When in stall ing, hold by
the body (1) hex to keep the regulator fi rm.
9. Basic Regulator - (Refer to Figure 1): Reg u la tor
may be installed in any position in relation to the
pipe. Rec om mend ed position is with spring cham ber vertical upwards. Orient such that the spring
chamber vent hole does not collect rain wa ter or
debris.
10. Regulators are not to be direct buried under ground.
11. For insulated piping systems, recommendation is
to not insulate the regulator.
SECTION III
CAUTION D
DO NOT HYDROSTATIC TEST THRU AN IN STALLED
UNIT; ISOLATE REG U LA TOR FROM TEST. The up per
range spring pres sure level list ed on the name plate
is the rec om mend ed "upper op er a tive limit" for the
sens ing di a phragm (see Sec tion IV. Startup, Num ber
7). High er pres sures could cause inter nal dam age.
In ad di tion, note on the name plate that the Inlet and
Outlet pres sure and tem pera ture ratings are at different lev els.
III. PRINCIPLE OF OPERATION
1. Movement occurs when the inlet pressure pass es
by the seat causing a distributive force on the
un der side of the diaphragm. This, in turn, op poses the point force of the range spring caus ing
up ward movement of the di a phragm, al low ing
IV. START-UP
1. Start with the block valves closed. A bypass valve
may be used to maintain outlet pressure in the
down stream sys tem without changing the fol low ing steps.
2. Relax the range spring (10) by turning the ad just ing
screw (12) counter clockwise (CCW) a min i mum
of three (3) full revolutions. This re duces the outlet
(downstream) pres sure setpoint. NOTE: If the
Option -2 or -22 is utilized, the adjusting screw
(12) and locknut (13) are re placed with a knob
(18) and locknut (13). With Option -2 +80 or -22
+80, the adjusting screw (12) and locknut (13) are
replaced with a handwheel subas sem bly (20) and
locknut (13).
3. If it is a “hot” piping system, and equipped with
a bypass valve, slowly open the bypass valve
to preheat the system piping and to allow slow
ex pan sion of the piping. Ensure proper steam
trap operation if installed. Closely monitor outlet
(down stream) pressure via gauge to ensure not
over-pressurizing. NOTE: If no bypass valve is
in stalled, extra caution should be used in start ing
up a cold system; i.e. do everything slowly.
4. Crack open the outlet (downstream) block
valve.
5. Slowly open inlet (upstream) block valve ob serv ing
the outlet (downstream) pressure gauge. De ter-
the plug to seat. When set pressure de creases,
due to de mand, the dis trib u tive force beneath the
dia phragm lessens - al low ing the range spring to
open the seat and regulate pres sure.
2. A complete diaphragm failure will cause the reg u la tor to fail open.
SEC TION IV
mine if the regulator is fl owing. If not, slowly rotate
the regulator adjusting screw (12) clock wise (CW)
until fl ow begins.
6. Continue to slowly open the inlet (upstream) block
valve until fully open.
7. Continue to slowly open the outlet (downstream)
block valve, especially when the downstream pip ing
system isn’t pressurized. If the outlet (down stream)
pressure exceeds the desired pres sure, close the
block valve and go to Step 2, then return to Step
4.
8. When fl ow is established steady enough that the
outlet (downstream) block valve is fully open, begin
to slowly close the bypass valve if installed.
9. Develop system fl ow to a level near its expected
normal rate, and reset the regulator setpoint by
turning the ad just ing screw (12) CW to increase
outlet pressure or CCW to reduce outlet pressure.
10. Reduce system fl ow to a minimum level - ob serve
setpoint. Outlet pressure will rise from the setpoint
of Step 9. The maximum rise in outlet pressure
on decreasing fl ow should not exceed the stated
upper limit of the range spring (10) by greater than
10%; i.e. 5-30 psig (.34-2.1 Barg) range spring, at
low fl ow the outlet pressure should not exceed 33
psig (2.3 Barg). If it does, consult factory.
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IOM-1465
SECTION V
V. SHUTDOWN
1. On systems with a bypass valve, and where sys tem pressure is to be maintained as the regu la tor
is shut down, slowly open the bypass valve while
closing the inlet (up stream) block valve. Fully
close the inlet (upstream) block valve. (When on
bypass, the system pressure must be con stantly
observed and manually reg u lat ed. ) Close the
outlet (down stream) block valve.
SECTION VI
VI. MAINTENANCE
WARNING 1
SYSTEM UNDER PRESSURE. Prior to per form ing any
main te nance, isolate the reg u la tor from the sys tem
and relieve all pres sure. Failure to do so could result
in personal injury.
A. General:
1. Maintenance procedures hereinafter are
based upon re mov al of the regulator from
the pipe line where in stalled.
2. Owner should refer to owner’s procedures for
removal, handling, cleaning and dis posal of
non-reusable parts, i.e. O-rings, etc.
CAUTION E
Do not leave a bypassed reg u la tor unattended.
2. If the regulator and system are to both be shut down, slowly close the inlet (upstream) block
valve. Close the outlet (downstream) valve only
if reg u la tor re mov al is required.
units with Option -80 (spring ranges 270-400
psig (18.6-27.6 Barg) and 360-500 psig (24.8
-34.5 Barg)) also remove the thrust bearing
(15), upper bear ing washer (16), and lower
bearing wash er (17). Inspect threads of spring
chamber (2) for cleanliness.
5. Remove pressure plate (9) and inspect to
ensure no deformation due to over-pres suri za tion. If deformed, replace.
6. Remove diaphragm(s) (8), O-ring (7) and
push er plate (6). Inspect pusher plate (6) to
ensure no deformation due to over-pres suri za tion. If de formed, re place. Dis card O-ring
(7) and diaphragm(s) (8).
3. Refer to Figure 1 for the standard regu la tor
and its options.
B. Diaphragm Replacement:
1. Securely install the body (1) in a vise with the
spring chamber (2) directed up wards.
WARNING 2
SPRING UNDER COM PRES SION. Prior to re mov ing
spring chamber, relieve spring com pres sion by back ing out the ad just ing screw or handwheel. Failure
to do so may result in fl ying parts that could cause
per sonal in ju ry.
2. Relax range spring (10) by turning ad just ing
screw (12) CCW until removed from spring
cham ber (2). NOTE: If the Option -2 or -22 is
utilized, the adjusting screw (12) and locknut
(13) are replaced with a knob (18) and locknut
(13). With the Option -2 +80 or -22 + 80, the
ad just ing screw (12) and lock nut (13) are
replaced with a handwheel subas sem bly (20)
and lock nut (13).
3. Loosen spring chamber (2) by placing wrench
on “fl ats” and rotating CCW. DO NOT use the
fl ats on either side of the vent hole.
4. Remove spring chamber (2), spring button
(11), and range spring (10). NOTE: For
IOM-1465
7. Clean body (1) and body recess according
to owner's procedures. NOTE: On regulators
orig i nal ly sup plied as “oxygen clean”, Option
1465-55, main te nance must include a lev el of
clean li ness equal to Cash co’s clean ing Stan dard #S-1134. Con tact factory for details.
8. Install new O-ring (7) and diaphragm(s) (8).
NOTE: Refer to the quantity of diaphragm(s)
(8) in cor po rat ed in the bill of materials list ing.
De pend ing on outlet pressure level, multiple
metal di a phragms may be “stacked”.
9. Visually center pressure plate (9) on
diaphragm(s) (8). Place the range spring (10)
on to the retainer hub of the pressure plate
(9).
10. Place multi-purpose, high temperature grease
into the depression of the spring button (11)
where adjusting screw (12) bears. Set spring
button (11) onto range spring (10); ensure
spring button (11) is laying fl at. NOTE: For
units with Option -80 (spring ranges 270-400
psig (18.6-27.6 Barg) and 360-500 psig (24.8-
34.5 Barg) position spring button (11), thrust
bear ing (15), upper bearing washer (16), and
lower bearing wash er (17) on top of the range
spring (10).
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