Page 1
Instruction Manual
Form 5463
April 1999
Y690A Series
Y690A Series Pressure Reducing Regulators
Introduction
Scope of Manual
This manual provides instructions for installation,
startup, maintenance, and parts information for the
Y690A Series pressure reducing regulators.
Instructions and parts lists for other equipment used
with these regulators are found in separate manuals.
Product Description
The Y690A Series pressure reducing regulator (figure 1)
is ideally suited to control gas supply to in-plant
processing equipment. The rugged casings and sliding
pusher post design withstands the full 150 psig (10,3
bar) inlet pressure at both the inlet and outlet
connections. Because these regulators can withstand
the full inlet pressure, a downstream relief valve is not
required to protect the downstream side of the regulator
unless full capacity relief is required. These pressure
reducing regulators may be applied in a variety of
commercial and industrial applications. Available type
numbers are described as follows:
Type Y690A—Low-pressure, 1 to 7-inches w.c. (2 to 17
mbar), direct-operated regulator with internal registration
requiring no downstream control line.
Type Y690AH—Low-pressure, 5-inches w.c. to 7 psig
(12 to 480 mbar), direct-operated regulator with internal
registration requiring no downstream control line.
Type Y690AM—Low-pressure, 1 to 7-inches w.c. (2 to
17 mbar), direct-operated regulator. The Type Y690AM
has a blocked throat and O-ring stem seal for use when
Figure 1. Types Y690A and Y690AH Pressure Reducing Regulators
external registration is required. Lower diaphragm
casing assembly is tapped for 1/2-inch NPT for control
line connection.
Type Y690AHM—Low-pressure, 5-inches w.c. to 7 psig
(12 to 480 mbar), direct-operated regulator with a
blocked throat and O-ring stem seal for use when
external registration is required. Lower diaphragm
casing assembly is tapped for 1/2-inch NPT for control
line connection.
Specifications
The Specifications section on page 2 provides the
ratings and other specifications for the Y690A Series.
Individual regulator data is stamped on the nameplate
as it comes from the factory.
W7293
www.FISHERregulators.com
D102587X012
Page 2
Y690A Series
Specifications
Body Sizes
3/4 (DN 20) or 1-inch (DN 25)
Regulator Temperature Capabilities
With Nitrile (NBR):
-20° to 180°F (-29° to 82°C)
End Connection Styles
See table 3
Maximum Allowable Inlet Pressure
150 psig (10,3 bar)
Maximum Operating Inlet Pressure
See table 2
Maximum Outlet (Casing) Pressure
(1)
(1)
(1)
With Fluoroelastomer (FKM):
40° to 300°F (4° to 149°C)
With Ethylenepropylene (EPDM):
-20° to 300°F (-29° to 149°C)
With Perfluoroelastomer (FFKM):
-20° to 300°F (-29° to 149°C)
Pressure Registration
Y690A and Y690AH: Internal
Y690AM and Y690AHM: External
150 psig (10,3 bar)
Spring Case Connection
Maximum Emergency Outlet Pressure to Avoid
Internal Parts Damage
(1)
1/4-inch NPT Screwed
Diaphragm Case Connection
150 psig (10,3 bar)
Outlet Pressure Ranges
(1)
See table 1
1. The pressure/temperature limits in this manual and any applicable standard or code limitation should not be exceeded.
1/2-inch NPT Screwed
Approximate Weight
19 pounds (8,6 kg)
(1)
Table 1. Outlet Pressure Ranges (Spring, key 6)
EPYTEGNARERUSSERPLORTNOCTELTUOREBMUNTRAPGNIRPSROLOCGNIRPSRETEMAIDERIWGNIRPS
dnaA096Y
MA096Y
dnaHA096Y
MHA096Y
)rabm6ot2(.c.wsehcni-2/1-2ot1
)rabm71ot6(.c.wsehcni-7ot2/1-2
)rabm52ot21(.c.wsehcni-01ot5
)rabm73ot71(.c.wsehcni-51ot7
)rabm38ot43(gisp2.1ot5.0
)rabm271ot38(gisp5.2ot2.1
)rab13,0ot71,0(gisp5.4ot5.2
)rab84,0ot13,0(gisp7ot5.4
.nwodgnitniopdellatsniebtsumesacgnirpsehtegnarerusserpteltuodehsilbupehteveihcaoT.1
)2()1(
250725855B1
)1(
250728356B1
250728356B1
220729356B1
250720735B1
220721735B1
220722735B1
250723735B1
.)C°61(F°06nahtrewolserutarepmetmgarhpaidtasgnirpsesehthtiwmgarhpaid)MKF(remotsaleoroulfesutonoD.2
egnarO
deR
deR
bardevilO
wolleY
neergthgiL
eulbthgiL
kcalB
Table 2. Maximum Operating Inlet Pressures
ECIFIRO
,EZIS
SEHCNI
)mm(
)2,3(8/1)3,01(051)3,01(051)3,01(051)3,01(051)3,01(051)3,01(051)3,01(051)3,01(051
)4,6(4/1
)5,9(8/3
)7,21(2/1
)3,41(61/9
)8,2(04
)4,1(02
)96,0(01
)43,0(5
A096YepyT MHA096Ydna,MA096Y,HA096YsepyT
.c.w.nI-5.2ot1
)rabm0,6ot5,2(
.c.w.nI-7ot5.2
)rabm71ot0,6(
)1,4(06
)4,1(02
)96,0(01
)43,0(5
.c.w.nI-01ot5
)rabm52ot21(
)2,5(57
)4,2(53
)55,0(8
)43,0(5
.c.w.nI-51ot7
)rabm73ot71(
)2,5(57
)4,2(53
)55,0(8
)43,0(5
EGNARERUSSERPTELTUO
gisP2.1ot5.0
)rabm38ot43(
)2,5(57
)4,2(53
)55,0(8
)43,0(5
gisP5.2ot2.1
)rabm271ot38(
)3,01(051
)1,4(06
)96,0(01
)14,0(6
gisP5.4ot5.2
)3,01(051
)1,4(06
)38,0(21
)55,0(8
)mm38,1(hcni-270.0
)mm2,2(hcni-580.0
)mm2,2(hcni-580.0
)mm7,2(hcni-501.0
)mm9,2(hcni-411.0
)mm0,4(hcni-651.0
)mm8,4(hcni-781.0
)mm5,5(hcni-812.0
)rab13,0ot71,0(
gisP7ot5.4
)rab84,0ot13,0(
)3,01(051
)1,4(06
)38,0(21
)55,0(8
2
Page 3
HORIZONTAL PIPELINE
HORIZONTAL PIPELINE
Y690A Series
VENT POINTED DOWN
TYPE Y690AH
VENT POINTED DOWN
Figure 2. Types Y690AH and Y690AHM Actuator Casing Drainage Schematic
Installation
Personal injury, property damage,
equipment damage, or leakage due to
escaping gas or bursting of pressurecontaining parts may result if this
regulator is overpressured or installed
where service conditions could exceed
the limits given in the Specifications
section (page 2), or where conditions
exceed any ratings of the adjacent
piping or piping connections.
To avoid such injury or damage, provide
pressure-relieving or pressure-limiting
devices (as required by the appropriate
code, regulation, or standard) to prevent
DOWNSTREAM CONTROL LINE
TYPE Y690AHM
INLET PRESSURE
OUTLET PRESSURE
ATMOSPHERIC PRESSURE
DOWNSTREAM CONTROL PRESSURE
W6187
service conditions from exceeding
those limits.
Additionally, physical damage to the
regulator could cause personal injury or
property damage due to escaping gas.
To avoid such injury or damage, install
the regulator in a safe and well ventilated location.
Regulator operation within ratings does not preclude the
possibility of damage from debris in the lines or from
external sources. A regulator should be inspected for
damage periodically and after any overpressure condition
beyond the emergency outlet pressure limit specified in
the Specifications section (page 2). Key numbers refer-
enced in this section are shown in figures 4, 5, and 6.
3
Page 4
Y690A Series
Note
If the regulator is shipped mounted on
another unit, install that unit according
to the appropriate instruction manual.
1. Only personnel qualified through training and
experience should install, operate, and maintain a
regulator. For a regulator that is shipped separately,
make sure there is no damage to, or foreign material in
the regulator. Also ensure that all tubing and pipingare
free of debris.
2. The regulator may be installed in any position as
long as the flow through the body is in the direction
indicated by the arrow on the body. Normal installation
is with the spring case barrel vertical above or below
the diaphragm case. However, when using a Type
Y690A or Y690AM regulator, for proper operation to
achieve the published capacities, the spring case barrel
should be installed pointed down as shown in figure 1.
For complete actuator drainage of Types Y690AH and
Y690AHM, the regulator should be installed as shown
in figure 2. If continuous operation of the system is
required during inspection or maintenance, install a
three-valve bypass around the regulator.
before putting the regulator into operation. The control
line pipe should be at least 1/2-inch in diameter and
connected to a straight section of outlet piping 5 to 10
pipe diameters downstream of the regulator. If turbu-
lence exists, a hand valve can be installed in a straight
section of the control line. This hand valve can be
throttled down to dampen out pulsations which may
cause instability or cycling of the regulator.
Startup and Adjustment
To avoid personal injury, property
damage, or equipment damage caused
by bursting of pressure containing parts
or explosion of accumulated gas, never
adjust the control spring to produce an
outlet pressure higher than the upper
limit of the outlet pressure range for that
particular spring. If the desired outlet
pressure is not within the range of the
control spring, install a spring of the
proper range according to the Diaphragm and Spring Case Area section of
the maintenance procedure.
A regulator may vent some gas to the
atmosphere. In hazardous or flammable
gas service, vented gas may accumulate
and cause personal injury, death, or
property damage due to fire or explosion.
Vent a regulator in hazardous gas service
to a remote, safe location away from air
intakes or any hazardous area. The vent
line or stack opening must be protected
against condensation or clogging.
3. To keep the spring case vent from being plugged or
the spring case from collecting moisture, corrosive
chemicals, or other foreign material, point the vent down
or otherwise protect it. The diaphragm casing (key 4)
may be rotated in order to obtain desired positioning.
4. To remotely vent the regulator, remove the vent
(key 26) and install obstruction-free tubing or piping into
the 1/4-inch NPT vent tapping. Provide protection on a
remote vent by installing a screened vent cap into the
remote end of the vent pipe.
5. The Types Y690AM and Y690AHM require a down-
stream control line. Be sure to install the control line
Y690A Series regulators can be placed in operation by
slowly introducing inlet pressure. The regulator takes
control when downstream pressure is established. The
regulator has been adjusted at the factory to provide
approximately the reduced pressure requested on the
order. With a spring-loaded regulator, the pressure
setting may be adjusted to a value within the spring
range shown in table 2. To adjust the pressure setting,
perform the following steps (key numbers are refer-
enced in figures 4, 5, and 6):
1. Remove the closing cap (key 22).
2. Use a 1-inch (25,4 mm) hex rod or flat screwdriver
to turn the adjusting screw (key 35) either clockwise to
increase outlet pressure or counterclockwise to decrease outlet pressure.
Shutdown
First close the nearest upstream shutoff valve and then
close the nearest downstream shutoff valve to vent the
regulator properly. Next, open the vent valve between
the regulator and the downstream shutoff valve nearest
to it. All pressure between these shutoff valves is
4
Page 5
Y690A Series
released through the open vent valve, since a Y690A
Series remains open in response to the decreasing
downstream pressure. For a regulator with a control
line, the valve in the control line must also be closed
and the diaphragm casing vented to the atmosphere.
Maintenance
Regulator parts are subject to normal wear and must be
inspected and replaced as necessary. The frequency of
inspection and replacement of parts depends upon the
severity of service conditions or the requirements of
local, state, and federal regulations. Due to the care
Fisher takes in meeting all manufacturing requirements
(heat treating, dimensional tolerances, etc.), use only
replacement parts manufactured or furnished by Fisher.
To avoid personal injury, property
damage, or equipment damage caused
by sudden release of pressure or explosion of accumulated gas, do not attempt
any maintenance or disassembly without
first isolating the regulator from system
pressure and relieving all internal
pressure from the regulator.
BODY SEAL
O-RING (KEY 11)
BACKUP RING (KEY 50)
BODY (KEY 1)
Figure 3. Expanded View of the Body Area
Showing the O-ring and Backup Ring Placement
5. To replace the pitot tube (key 32, figure 4) on the
Types Y690A and Y690AH, remove the pitot tube
screws (key 33), install the new pitot tube, and secure
with the pitot tube screws (key 33). Position the pitot
tube so that it points into the outlet of the body by
rotating the guide insert (key 18).
6. To inspect the throat seal O-ring (key 31, figure 5)
on the Types Y690AM and Y690AHM, remove the
machine screw (key 33, figure 5). Replace if necessary, and reassemble.
7. Install the disk assembly (key 13) and secure it
with the cotter pin (key 15).
8. Place back-up ring (key 50) into the body (key 1).
Then place the body seal O-ring (key 11) into the body.
See figure 3.
Body Area
This procedure is for gaining access to the disk
assembly, orifice, body O-ring, and pitot tube if used.
All pressure must be released from the diaphragm
casing, and the disk assembly must be open, before
these steps can be performed. Key numbers are
referenced in figures 4, 5, and 6.
1. Remove the cap screws (key 2, figure 6) and
separate the diaphragm casing (key 4) from the body
(key 1).
2. Remove and inspect the body seal O-ring (key 11)
and the backup ring (key 50). See figure 3.
3. Inspect and replace the orifice (key 5) if necessary.
Protect the orifice seating surface during disassembly
and assembly. Lubricate the threads of the replacement
orifice with a good grade of light grease and install with
29 to 37 foot-pounds (39 to 50 N•m) of torque.
4. Remove the cotter pin (key 15) to replace the disk
assembly (key 13) or to inspect the throat seal O-ring
(key 31, figure 5) on the Types Y690AM and Y690AHM.
9. Place the diaphragm casing (key 4) on the body
(key 1). Secure the the diaphragm casing to the body
with the cap screws (key 2, figure 6).
Diaphragm and Spring Case Area
This procedure is for gaining access to the spring,
diaphragm, lever assembly, and stem. All pressure
must be released from the diaphragm casing before
these steps can be performed.
To Change the Control Spring:
Note
Any remote control drive unit used with
a Y690A Series regulator must be removed from the spring case (key 3)
before these steps can be performed.
1. Remove the closing cap (key 22), and turn the
adjusting screw (key 35) counterclockwise to remove
all the compression from the control spring (key 6).
5
Page 6
Y690A Series
2. Change the control spring (key 6) to match the
desired spring range.
3. Replace the adjusting screw (key 35).
4. Install a replacement closing cap gasket (key 25), if
necessary, and reinstall the closing cap (key 22).
5. If the spring range was changed, be sure to change
the stamped spring range on the nameplate.
To Disassemble and Reassemble Diaphragm Parts:
Key numbers are referenced in figures 4, 5, and 6.
1. Remove the closing cap (key 22), and turn the
adjusting screw (key 35) counterclockwise to remove
the adjusting screw and the control spring (key 6).
2. Remove the spring case hex nuts (key 23, not
shown), cap screws (key 24), and spring case (key 3).
3. Remove the diaphragm (key 10) plus attached parts
by tilting them so that the pusher post (key 8) slips off
the lever assembly (key 16). To separate the diaphragm
(key 10) from the attached parts, unscrew the spring
holder screw (key 38) from the pusher post (key 8).
4. Inspect the pusher post (key 8) and the post seal
O-ring (key 48), replace if required.
5. Remove hex nut (key 21) to separate the diaphragm (key 10) and attached parts.
6. To replace the lever assembly (key 16), remove
the machine screws (key 17). To replace the stem
(key 14) or access the stem seal O-ring (key 30, Types
Y690AM and Y690AHM only), perform Body Area
Maintenance procedure steps 1 and 4. Then pull the
stem out of the diaphragm casing (key 4).
• Hex Nut (key 21) — Torque the hex nut 9 to 11
foot-pounds (12 to 15 N•m) to secure parts to the
pusher post connector (key 40)
• Overpressure Spring (key 39)
• Spring Holder (key 37)
• Machine Screw (key 38)
10. Insert and tighten the machine screw (key 38)
with a torque of 1 to 3 foot-pounds (1 to 4 N•m) to
secure the diaphragm parts to the pusher post (key 8).
11. Install the assembled parts in the diaphragm
casing (key 4). Make sure that the lever (key 16) fits in
the pusher post (key 8) and that the holes in the
diaphragm (key 10) align with the holes in the diaphragm casing.
12. Install the spring case (key 3) on the diaphragm
casing (key 4) so that the vent assembly (key 26) is
correctly oriented, and secure with the cap screws
(key 24, figure 6) and hex nuts (key 23, not shown)
fingertight only.
13. Insert the control spring (key 6) into the spring
case (key 3), followed by the adjusting screw (key 35).
14. Turn the adjusting screw (key 35) clockwise until
there is enough spring (key 6) force to provide proper
slack to the diaphragm (key 10). Using a crisscross
pattern, finish tightening the cap screws (key 24) and
hex nuts (key 23) to 14 to 17 foot-pounds (19 to 23
N•m) of torque. To adjust the outlet pressure, refer to
the Startup and Adjustment section.
15. Install a replacement closing cap gasket (key 25)
if necessary, and then install the closing cap (key 22).
To Convert Constructions
7. Install the stem (key 14) into the diaphragm casing
(key 4) and perform Body Area Maintenance procedure
steps 6 through 9 as necessary.
8. Install the lever assembly (key 16) into the stem
(key 14) and secure the lever assembly with the
machine screws (key 17).
9. Install the parts on the pusher post in the order
listed below:
• Pusher Post (key 8)
• Pusher Post Connector (key 40)
• Connector Seal O-Ring (key 49)
• Diaphragm Head (key 7)
• Diaphragm (key 10), pattern side up
• Diaphragm Head (key 7)
6
The Type Y690A to the Type Y690AM:
New parts required: keys 30, 31, and 33
1. Remove pipe plug (key 27, figure 4) from the dia-
phragm casing (key 4).
2. Refer to steps 1 and 5 in the Body Area Maintenance
section to remove the four machine screws (key 33) and
pitot tube (key 32, figure 4).
3. Insert the throat seal O-ring (key 31, figure 5) and one
machine screw (key 33).
4. Insert the stem seal O-ring (key 30, figure 5) by
following steps 1 through 6 in the Diaphragm and Spring
Case Area Maintenance Section
Page 7
Y690A Series
The Type Y690AM to the Type Y690A:
New parts required: keys 27, 32, and 33
1. Insert pipe plug (key 27, figure 4) in the diaphragm
casing (key 4).
2. Follow steps 1 through 6 in the Diaphragm and Spring
Case Area Maintenance Section to remove one machine
screw (key 33, figure 5), the stem seal O-ring (key 30,
figure 5), and the throat seal (key 31, figure 5) blocking
the registration port.
3. Insert pitot tube (key 32) and four machine screws
(key 33) as outlined in step 5 of the Body Area Maintenance section.
Parts Ordering
When corresponding with the Fisher Sales Office or
Sales Representative about this regulator, include the
type number and all other pertinent information
stamped on the nameplate. Specify the elevencharacter part number when ordering new parts from
the following parts list.
Parts List
Key Description Part Number
Spare Parts Kit (Included are keys 10, 11,
12, 13, 15, 30, 31, 33, 48, and 49) RY690AX0012
1 Body See Table 3
2 Cap Screw
Ductile Iron 1C856228992
Stainless Steel 18B3456X012
3 Spring Case Assembly
Ductile iron 13B0109X042
Stainless steel 13B0109X032
Key Description Part Number
4 Diaphragm Casing
Ductile iron 47B3063X012
Stainless steel 47B3064X012
Hastelloy C 47B3064X022
5 Orifice
S30300 Stainless Steel (Standard)
1/8-inch (3,2 mm) 1A936735032
1/4-inch (6,4 mm) 0B042035032
3/8-inch (9,5 mm) 0B042235032
1/2-inch (12,7 mm) 1A928835032
9/16-inch (14,3 mm) 1C425235032
S31600 Stainless steel (NACE)
1/8-inch (3,2 mm) 1A9367X0022
1/4-inch (6,4 mm) 0B0420X0012
3/8-inch (9,5 mm) 0B0422X0012
1/2-inch (12,7 mm) 1A9288X0012
9/16-inch 14,3 mm) 1C4252X0022
Hastelloy C
3/8-inch (3,2 mm) 0B0422X0022
6 Spring
Y690A and Y690AM
1 to 2-1/2-inches w.c. (2 to 6 mbar) 1B558 527052
2-1/2 to 7-inches w.c. (6 to 17 mbar) 1B653 827052
Y690AH and Y690AHM
5 to 10-inches w.c. (12 to 25 mbar) 1B653 827052
7 to 15-inches w.c. (17 to 37 mbar) 1B653 927022
0.5 to 1.2 psig (34 to 83 mbar) 1B537 027052
1.2 to 2.5 psig (83 to 172 mbar) 1B537 127022
2.5 to 4.5 psig (0,17 to 0,31 bar) 1B537 227022
4.5 to 7 psig (0,31 to 0,48 bar) 1B537 327052
7 Diaphragm Head
Stainless Steel 17B9723X032
Hastelloy C 17B9723X022
8 Pusher Post
S30300 Stainless Steel (Standard) 27B5354X012
S31600 Stainless Steel (NACE) 27B5354X022
Hastelloy C 27B5354X032
10* Diaphragm
Nitrile (NBR) 37B9720X012
Fluoroelastomer (FKM) 23B0101X052
Nitrile (NBR) with PTFE 34B4375X012
11* Body Seal O-Ring
Nitrile (NBR) 1H993806992
Fluoroelastomer (FKM) 1H9938X0012
Perfluoroelastomer (FFKM) 1H9938X0042
Ethylenepropylene (EPDM) 1H9938X0022
* Recommended spare part
Table 3. Body Materials and Part Numbers (Body, key 1)
LAIRETAMYDOBELYTSNOITCENNOCDNE
norielitcuDdewercSTPN210X1535B71220X1535B71
sselniatShtiwleetssselniatS
segnalfleets
04/52/61NP211X3379B71221X3379B71
htiwleetssselniatS
segnalfleetsnobraC
04/52/61NP250X3379B71260X3379B71
CyolletsaHFR051ssalCISNA---210X2379B71
)1(
ydoB)02ND(hcnI-4/3ydoB)52ND(hcnI-1
dewercSTPN230X1535B71240X1535B71
FR051ssalCISNA270X3379B71280X3379B71
FR003ssalCISNA290X3379B71201X3379B71
FR051ssalCISNA210X3379B71220X3379B71
FR003ssalCISNA230X3379B71240X3379B71
.ecaf-ot-ecaf)mm653(sehcni-41sinoisnemidegnalfno-dleW.CyolletsaHtpecxenodedlewerasegnalfllA.1
REBMUNTRAP
7
Page 8
Y690A Series
Key Description Part Number
12* Insert Seal
Nitrile (NBR) 1B885 506992
Fluoroelastomer (FKM) 1B8855X0012
Perfluoroelastomer (FFKM) 1B8855X0062
Ethylenepropylene (EPDM) 1B8855X0022
13* Disk Assembly
S30300 Stainless Steel with
Nitrile (NBR) 1C4248X0202
Fluoroelastomer (FKM) 1C4248X0052
Ethylenepropylene (EPDM) 1C4248X0302
S31600 Stainless Steel with
Nitrile (NBR) 1C4248X0252
Fluoroelastomer (FKM) 1C4248X0192
Perfluoroelastomer (FFKM) 1C4248X0332
Ethylenepropylene (EPDM) 1C4248X0152
Hastelloy C with PTFE 1C4248X0382
14 Stem
S30300 Stainless steel (Standard) 17B3423X012
S31600 Stainless steel (NACE) 17B3423X022
Hastelloy C 17B3423X032
15* Cotter Pin
Stainless Steel 1A866537022
Hastelloy C 14B7990X012
16 Lever Assembly
Stainless steel 1B5375000B2
Hastelloy C 1B5375X0092
17 Machine Screw (2 required)
Stainless Steel 19A7151X022
Hastelloy C 17B9736X012
18 Guide Insert
Stainless Steel 27B4028X022
Hastelloy C 27B4028X032
21 Hex Nut 1A354 02 4122
22 Closing Cap
Plastic (Standard) T13524T0062
Steel 1E422724092
Stainless Steel 1E422735072
23 Hex Nut (8 required)
Ductile Iron 1A352 724122
Stainless Steel 1E9440X0352
24 Diaphragm Case Cap Screw (8 required)
Ductile Iron 1A352 524052
Stainless Steel 18B3455X012
25 Closing Cap Gasket, Steel and
Stainless Steel Closing Cap Only 1P753306992
Key Description Part Number
26 Vent Assembly
Spring Case Down (Type Y602-1) 17A6570X012
Spring Case Up (Type Y602-11) 17A5515X012
Spring Case Sideways (Type Y602-12) 27A5516X012
27 Pipe Plug (Types Y690A and Y690AH only)
Steel 1A369224492
Stainless Steel 1A369235072
Hastelloy C 1A3692X0042
30* Stem Seal (Types Y690AM and Y690AHM only)
Nitrile (NBR) 1H2926G0012
Fluoroelastomer (FKM) 1H2926X0022
Perfluoroelastomer (FFKM) 1H2926X0042
Ethylenepropylene (EPDM) 1H2926X0012
31 Throat Seal (Types Y690AM and Y690AHM only)
Nitrile (NBR) 1D682506992
Fluoroelastomer (FKM) 1D6825X0012
Perfluoroelastomer (FFKM) 1D6825X0032
Ethylenepropylene (EPDM) 1D6825X0042
32 Pitot Tube (Types Y690A and Y690AH only) 17 B4479X012
33 Machine Screw (4 required)
Types Y690A and Y690AH
Stainless Steel 19A7151X022
33 Machine Screw (1 required)
Types Y690AM and Y690AHM
Stainless Steel 18A0703X022
Hastelloy C 18A0703X032
35 Adjusting Screw 1B537944012
37 Spring Holder 1R982025072
38 Machine Screw 10B6189X022
39 Overpressure Spring 1B541327022
40 Pusher Post Connector
S30300 Stainless Steel (Standard) 27B7982X012
S31600 Stainless Steel (NACE) 27B7982X022
Hastelloy C 27B7982X032
46 Nameplate - - - - - - - - - - 47 Drive Screw (2 required) 1A368228982
48 Post Seal
Nitrile (NBR) 1D687506992
Fluoroelastomer (FKM) 1N430406382
Perfluoroelastomer (FFKM) 1D6875X0082
Ethylenepropylene (EPDM) 1D6875X0032
49* Connector Seal
Nitrile (NBR) 13A1584X012
Fluoroelastomer (FKM) 13A1584X022
Perfluoroelastomer (FFKM) 13A1584X032
Ethylenepropylene (EPDM) 13A1584X042
50 Backup Ring, Stainless Steel 18B3446X012
* Recommended spare part
8
Page 9
Y690A Series
B2628_1
Figure 4. Type Y690A or Y690AH Regulator Assembly
9
Page 10
Y690A Series
10
B2629_1
Figure 5. Type Y690AM or Y690AHM Regulator Assembly
Page 11
Y690A Series
B2630
Figure 6. Type Y690AM or Y690AHM Regulator Assembly
11
Page 12
Y690A Series
Fisher is a mark owned by Fisher Controls International, Inc., a business of Emerson Process Management. The Emerson logo is a trademark and service mark of Emerson Electric Co. All other marks are the
property of their respective owners.
The contents of this publication are presented for informational purposes only, and while every effort has been made to ensure their accuracy, they are not to be construed as warranties or guarantees, express
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©Fis her C ontro ls Inte rnati onal, Inc., 1999; All Righ ts Res erved
www.FISHERregulators.com
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