Emerson Fisher Accu-Pressure Y693 User manual

Type Y693
D102021X012
Instruction Manual
Form 5342
March 1994
www.FISHERregulators.com
Type Y693 Gas Blanketing Regulator
Introduction
Scope of Manual
This instruction manual includes installation, startup,
maintenance, and parts information for the Type Y693
Gas Blanketing Regulator (figure 1).
Product Description
The Accu-Pressure®Type Y693 Gas Blanketing Regula-
tor (figure 1) is a pressure reducing regulator with
external registration requiring a downstream control line.
It is used for accurate pressure control on pressure
blanketing systems. The regulator will help in controlling
emissions from the blanketed product and helps in
protecting against any contamination to the blanketed
product by atmospheric conditions.
The regulator will maintain a positive vessel pressure
reducing the possibility of vessel wall collapse. The
Type Y693 is available in 1-1/2-inch and 2-inch body
sizes.
Specifications
Table 1 lists specifications for the Type Y693 Gas
Blanketing Regulator. Specifications for a given regula-
tor as it originally comes from the factory are stamped
on the spring case nameplate.
Figure 1. Type Y693 Gas Blanketing Regulator
W6200

Type Y693
2
1. Flanged end connections and end connections for other than U.S. standard can usually be provided; consult the Fisher sales office or sales representative.
2. The pressure/temperature limits in this manual, and any applicable standard limitation, should not be exceeded.
Specifications
Installation
Personal injury, equipment damage, or
leakage due to escaping accumulated gas
or bursting of pressure-containing parts
may result if the gas blanketing regulator
is overpressured or is installed where
service conditions could exceed the
limits given in table 1, or where condi-
tions 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 byTitle 49, Part 192, of the U.S.
Body Sizes and End Connection Styles(1)
1-1/2 and 2 inch NPT screwed, Flanged ANSI
class 150 & 300 (Optional), or DIN class PN 16,
25, and 40 raised faced flanged (Optional)
Maximum Allowable Inlet Pressure(2)
150 Psig (10.4 bar) or body rating limit
Maximum Outlet Pressure (Casing)(2)
15 Psig (1.0 bar)
Outlet Pressure Ranges (2)
See table 1
Maximum Operating Outlet Pressure to Avoid
Internal Part Damage(2)
2 Psig (0.14 bar) above outlet pressure setting
Material Temperature Capabilities(2)
Nitrile: - 20° to 180°F (- 29° to 82°C)
Fluoroelastomer: + 40° to 300°F (+ 5° to 149°C)
Elastomeric PTFE: 0° to 300°F (- 18° to 149°C)
Spring Case Connection
Aluminum Version: 3/4 inch NPT
Steel & Stainless Steel Version: 1/2 inch NPT
Approximate Weights
Aluminum Version: 22 lbs (9.9 kg)
Steel Version: 57 lbs (25.8 kg)
Steel & Stainless Steel with Aluminum Spring
Case: 35 lbs (15.8 kg)
Code of Federal Regulations, by the
National Fuel Gas Code Title 54 of the
National Fire Codes of the National Fire
Protection Association, or by other
applicable codes) to prevent service
conditions from exceeding those limits. A
regulator should be inspected immedi-
ately for damage after any overpressure
condition.
Additionally,physical damage to the gas
blanketing regulator could result in
personal injury and property damage due
to escaping accumulated gas. To avoid
such injury and damage, install the gas
blanketing regulator in a safe and well
ventilated location.
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Table 1. Outlet (Control) Pressure Ranges

Type Y693
3
Key numbers referenced in this section are shown in
figures 3, 4 & 5.
1. Use qualified personnel when installing, operating,
and maintaining the regulator. Before installing, inspect
the regulator for any shipment damage or foreign
material that may have collected during crating and
shipment. Make certain the body interior is clean and
the pipelines are free of foreign material. Apply pipe
compound only to the male pipe threads.
2. The regulator may be installed in any position as
long as the flow through the body is in the direction
indicated by the flow arrow attached to the body. Install
the regulator as close as possible to the blanketed
vessel using a straight run of pipe the same size or
larger as the regulator body. Position the body (key 28)
and/or diaphragm spring case (key 23) so it will not
collect moisture or debris into the screened vent (as
shown in figure 2). If the regulator requires reposition-
ing, refer to the body area maintenance procedures
and/or the diaphragm & spring case area maintenance
procedures in the Maintenance section to reposition the
screened vent for the application. If a block valve is
required, install a full flow valve between the regulator
and the blanketed vessel.
3. Attach a downstream pressure control line to the
female connection in the lower spring case. The female
pressure connection is a 1/2-inch NPT in the steel or
stainless steel lower spring case and a 3/4-inch NPT
for the aluminum lower spring case. Connect the other
end of the control line to the vessel. To allow for self-
drainage, install the control line at an angle so that any
liquid material will drain away from the regulator. See
figures 4 & 5 for the location of the external control line
connection.
If the regulator vents some gas or a leak
develops in the system, it indicates that
service is required. Failure to take the
regulator out of service immediately may
create a hazardous condition. In hazard-
ous 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 location. The vent line or stack
opening must be protected against
condensation or clogging.
4. For proper regulator operation, a spring case vent
(key 56) is required to allow atmospheric pressure to
register on the diaphragm. The spring case vent must
be kept open and positioned in such a manner to
prevent the spring case from collecting moisture,
corrosive chemicals, or other foreign material. To allow
maximum flexibility in installing the regulator, the vent
assembly is supplied separately in a bag. Install the
vent assembly in the 3/4-inch NPT vent tapping and
position the vent pointed down as shown in figure 2.
Depending on the orientation of the regulator, the elbow
(key 75) supplied with the vent may not be required to
position the vent pointed down.
5. To remotely vent the regulator, remove the vent and
install obstruction-free tubing or piping into the 3/4-inch
NPT vent tapping. Provide protection on a remote vent
by installing a screened vent cap into the remote end of
the vent pipe.
6. If continuous operation of the system is required
during inspection or maintenance, install a parallel
regulator with a three-valve bypass around the regulator.
Figure 2. Typical Type Y693 Installation
TYPE Y693
VENT
VALVE
VENT
VALVE
CONTROL
LINE
VENT
VALVE
BLOCK
VALVE
GAS BLANKETING PRESSURE
VESSEL / TANK
BLOCK
VALV E
BLOCK
VALVE
A6342

Type Y693
4
Startup and Adjustment
To avoid personal injury, property dam-
age, 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 or that
particular spring (see table 1). 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.
With installation completed, the regulator can be placed
in operation by slowly opening the upstream and
downstream block valves, if used, while using gauges
to monitor 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.
To ensure the correct pressure setting always use a
pressure gauge to verify the outlet pressure setting. The
range of allowable pressure settings is stamped on the
spring casing nameplate. If a pressure setting beyond
the stamped range is required, install a spring with the
desired range by following the procedures for changing
the spring and diaphragm in the Maintenance section.
To adjust the pressure setting, perform the following
steps (key numbers are referenced in figures 3, 4 & 5):
1. Remove the closing cap (key 3, if required).
2. Turn the adjusting screw (key 2) either clockwise to
increase outlet pressure or counterclockwise to de-
crease outlet pressure. The regulator will go into imme-
diate operation. To ensure correct operation always use
a pressure gauge to monitor the blanket pressure when
making adjustments.
3. Replace the closing cap (key 3, if required).
Shutdown
First, close the nearest upstream shutoff valve and
then, close the nearest downstream shutoff valve and
the block valve on the control line (refer to figure 2).
Next, open the vent valve between the regulator and
the downstream shutoff valve nearest to it. Then, open
the upstream vent valve and the vent valve in the
control line. All pressure between these shutoff valves
is released through the open vent valves, since a gas
blanketing regulator remains open in response to the
decreasing downstream pressure. If vent valves are not
installed, safely bleed off both inlet and outlet pressures,
and check that the regulator contains no pressure.
Principle of Operation
The Type Y693 Gas Blanketing Regulator reduces a
higher pressure gas to maintain a positive low pressure
of blanket gas over a stored liquid (see figure 2). Also
when the vessel (or tank) is suddenly cooled, causing
vapors to contract, the regulator replaces the volume of
contracting vapors with a volume of blanketing gas to
prevent the internal vessel pressure from decreasing. In
both cases, a positive vessel pressure prevents
outside air from entering the vessel and reduces the
possibility of atmospheric pressure collapsing the
vessel.
Gas blanketing regulators respond to a slight decrease in
internal vessel pressure (caused by pumpout or atmo-
spheric cooling) by throttling open to increase the flow
rate of gas into the vessel. When the vessel’s liquid level
has been lowered to the desired point and the vapor
pressure reestablished, the regulator throttles closed.
When the liquid level drops and vessel pressure de-
creases below the setting of the control spring, the
spring force on the diaphragm opens the disk assembly
to supply the required flow of gas to the vessel. When
vessel pressure has been satisfied, outlet pressure
tends to increase slightly, acting on the diaphragm. When
the outlet pressure exceeds the control spring setting,
the diaphragm moves to close the disk assembly.
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 dam-
age, or equipment damage caused by
sudden release of pressure, isolate the
regulator from all pressure and cau-
tiously release trapped pressure from the
regulator before attempting disassembly.

Type Y693
5
Body Area Maintenance Procedures
For the Aluminum lower casing version only:
Key numbers are referenced in figure 4.
This procedure is for gaining access to the disk assem-
bly, orifice, and body O-ring. All pressure must be
released from the regulator, before these steps can be
performed.
1. Remove the cap screws (key 18) that hold the
lower casing assembly (key 9) to the body (key 28).
Separate the lower casing from the body.
2. Inspect and replace the orifice (key 27) if necessary.
Lubricate the threads of the replacement orifice with a
good grade of pipe thread sealant. Install the orifice with
75 to 100 foot-pounds (102 to 136 N•m) of torque.
3. Inspect the disk (key 99) for nicks, cuts, and other
damage. Unscrew the machine screw (key 12) and
replace the disk with a new part if necessary. Install the
new disk, disk washer, and machine screw (keys 99,
98, & 12) and tighten to a torque of 1 to 2 foot-pounds
(1 to 3 N•m).
4. Inspect the bias spring (key 85) and disk holder (key
25). Unscrew the disk holder (key 25) from the valve
stem (key 13) and replace the bias spring with a new
part, if necessary. Lubricate the disk holder threads and
carefully tighten to 5 to 7 foot-pounds (7 to 9 N•m).
5. Inspect the body O-ring (key 16) for damage and/or
wear and replace if necessary.
6. Install the lower casing assembly (key 9) to the
body (key 28) with cap screws (key 18). Uniformly
tighten the two cap screws to a torque of 45 to 50 foot-
pounds (61 to 68 N•m).
For the Steel or Stainless Steel lower casing
version only:
Key numbers are referenced in figure 5.
This procedure is for gaining access to the disk assem-
bly, orifice, body gasket, and split ring. All pressure
must be released from the regulator, before these steps
can be performed.
1. Unscrew the union nut (key 19) from the body (key
28) and remove the lower casing assembly (key 20) and
split ring (key 17).
2. Inspect and replace the orifice (key 27) if necessary.
Lubricate the threads of the replacement orifice with a
good grade of pipe thread sealant. Install the orifice with
75 to 100 foot-pounds (102 to 136 N•m) of torque.
3. Inspect the disk (key 99) for nicks, cuts, and other
damage. Unscrew the machine screw (key 12) and
replace the disk with a new part if necessary. Install the
new disk, disk washer, and machine screw (keys 99,
98, & 12) and hand tighten to a torque of 1 to 2 foot-
pounds (1 to 3 N•m).
4. Inspect the bias spring (key 85) and disk holder
(key 25). Unscrew the disk holder (key 25) from the
valve stem (key 13) and replace the bias spring with a
new part, if necessary. Lubricate the disk holder
threads and carefully tighten to no more than 5 to 7
foot-pounds (7 to 9 N•m).
5. If necessary, install a replacement body gasket
(key 16) into the body (key 28).
6. Slide the union nut (key 19) as far as it will go onto
the lower casing assembly (key 20). Install both halves
of the split ring (key 17) into the slots of the lower
casing assembly (key 20) and secure them by sliding
the union nut down on the split ring.
7. Install the lower casing assembly (key 20) with the
attached split ring (key 17) and union nut (key 19) to
the body (key 28).
8. Tighten the union nut (key 19) until the lower casing
assembly (key 20) is secure on the body (key 28).
Diaphragm and Spring Case Area
This procedure is for gaining access to the spring,
diaphragm, and lever assembly stem. All pressure must
be released from the diaphragm case assembly before
these steps can be performed. Key numbers are
referenced in figures 3, 4 & 5.
To Change the Control Spring:
1. Remove the closing cap (key 3, if required), and turn
the adjusting screw (key 2) counterclockwise until all
compression is removed from the control spring (key 1).
2. Remove the adjusting screw (key 2) and upper
spring seat (key 4 or 44). Change the control spring to
match the desired spring range.
3. Replace the upper spring seat and install the
adjusting screw (key 2).
4. Install a replacement closing cap gasket (key 35),
if necessary, and reinstall the closing cap (key 3, if
required).
5. If the spring range was changed, be sure to change
the stamped spring range on the nameplate.

Type Y693
6
To Disassemble and Reassemble Diaphragm
Parts:
For the Aluminum lower casing version only:
Key numbers are referenced in figures 3 & 4.
1. Remove the downstream external control line.
Remove the closing cap (key 3), and turn the adjusting
screw (key 2) counterclockwise to remove the adjusting
screw (key 2). Remove the upper spring seat (key 4 or
44) and the control spring (key 1).
2. Remove the hex nuts (key 22), cap screws (key
21), and spring case (key 23).
3. Remove the diaphragm assembly (key 5) plus
attached parts by tilting them so that the pusher post
(key 8) slips off the lever assembly (key 49). To sepa-
rate the diaphragm (key 5) from the attached parts,
unscrew the spring holder cap screw (key 30) from the
pusher post (key 8).
4. Inspect the pusher post and replace if required.
5. To replace the lever assembly (key 49), remove the
machine screws (key 11), cotter pin (key 14), and clevis
pin (key 10). To replace the valve stem (key 13), unscrew
the cap screws (key 18) from the body (key 28) and
remove the lower casing assembly (key 9). Pull the valve
stem (key 13) out of the lower casing assembly (key 9).
6. To inspect the body bushing (key 97), remove the
bushing snap ring (key 74) and carefully remove the
body bushing from the lower casing assembly (key 9).
7. During the assembly procedure, use lubricants on
parts as indicated in figure 4 and replace parts as
required.
8. Install the body bushing O-ring (key 64) on the
body bushing (key 97). A wiper retaining ring (key 63) is
required to hold the wiper (key 66) in place while the
bushing is installed into the lower casing assembly (key
9). Ensure that the wiper is properly oriented with the
wiper lip pointing inward toward the diaphragm. Install
the bushing snap ring (key 74) to hold the body bushing
in place.
9. Apply a moderate coating of lubricant to the valve
stem (key 13). Install the stem O-ring (key 15) and the
two back-up rings (key 69, one on each side of the
O-ring) onto the valve stem (key 13).
10. Install the valve stem (key 13) from the body side
of the bushing, this is to ensure that the O-ring groove
does not damage the wiper.
11. Install the lever assembly (key 49) into the stem
(key 13) and insert the clevis pin (key 10) and cotter pin
(key 14). Secure the lever assembly (key 49) with the
machine screws (key 11). Carefully tighten the machine
screws to a torque of 7 to 9 foot-pounds (9 to 12 N•m).
12. Install the diaphragm and plate assembly (key 5,
pattern side up) on the pusher post. Then install the
lower spring seat (key 4).
13. Lubricate the diaphragm cap screw threads (key
30) and insert the cap screw to secure the diaphragm
parts to the pusher post (key 8). Carefully tighten to a
torque of 7 to 9 foot-pounds (9 to 12 N•m).
14. Install the assembled parts in the lower casing
(key 9). Make sure that the lever (key 49) fits in the
pusher post (key 8) and that the holes in the diaphragm
align with the holes in the lower casing.
15. Install the spring case (key 23) on the lower
casing assembly (key 9) so that the vent assembly
(key 56) is correctly oriented, and secure with the cap
screws (key 21) and hex nuts (key 22) fingertight only.
16. Insert the control spring (key 1) into the spring
case (key 23), followed by the upper spring seat (key 4
or 44) and the adjusting screw (key 2).
17. Turn the adjusting screw (key 2) clockwise until
there is enough control spring (key 1) force to provide
proper slack to the diaphragm (key 5). Using a crisscross
pattern, finish tightening the cap screws (key 21) and
hex nuts (key 22) to 18 to 21 foot-pounds (24 to 28 N•m)
of torque. To adjust the outlet pressure to the desired
setting, refer to the Startup and Adjustment section.
18. Install a replacement closing cap gasket (key 35)
if necessary, and then install the closing cap (key 3, if
required).
19. Connect the downstream control line and refer to
the Startup section before putting the regulator back in
operation.
For the Steel or Stainless Steel lower casing
version only:
Key numbers are referenced in figures 3 & 5.
1. Remove the downstream external control line.
Remove the closing cap (key 3, if required), and turn
the adjusting screw (key 2) counterclockwise to remove
the adjusting screw (key 2). Remove the upper spring
seat (key 4 or 44) and the control spring (key 1).
2. Remove the hex nuts (key 22), cap screws (key 21),
and spring case (key 23).
3. Remove the diaphragm assembly (key 5) plus
attached parts by tilting them so that the pusher post
(key 8) slips off the lever assembly (key 9). To separate

Type Y693
7
the diaphragm (key 5) from the attached parts, unscrew
the spring holder cap screw (key 30) from the pusher
post (key 8).
4. Inspect the pusher post and replace if required.
5. Inspect the lower spring seat (key 4), lower dia-
phragm head (key 6) and the lower diaphragm head
gasket (key 7) and replace if necessary.
6. To replace the lever assembly (key 9), remove the
machine screws (key 11). To replace the valve stem
(key 13), unscrew the union nut (key 19) from the body
(key 28) and remove the lower casing assembly (key
20) and split ring (key 17). Pull the valve stem (key 13)
out of the lower casing assembly (key 20).
7. To inspect the body bushing (key 97), remove the
bushing snap ring (key 74) and carefully remove the
body bushing from the lower casing assembly (key 20).
8. During the assembly procedure, use lubricants
indicated parts (figure 5) and replace parts as required.
9. Install the body bushing O-ring (key 64) on the
body bushing (key 97). To install the wiper (key 66),
place a small swab of lubricant into the body bushing to
hold the wiper in place while the bushing is installed
into the lower casing assembly (key 20). Ensure that
the wiper is properly oriented with the wiper lip pointing
inward toward the diaphragm. Install the bushing snap
ring (key 74) to hold the body bushing in place.
10. Apply a moderate coating of lubricant to the valve
stem (key 13). Install the stem O-ring (key 15) and the
two back-up rings (key 69, one on each side of the
O-ring) onto the valve stem (key 13).
11. Install the valve stem (key 13) from the body side
of the bushing, this is to ensure that the O-ring groove
does not damage the wiper.
12. Install the lever assembly (key 9) into the stem
(key 13) and secure the lever assembly (key 9) with the
machine screws (key 11). Carefully tighten the machine
screws to a torque of 2 to 3 foot-pounds (3 to 4 N•m).
13. Always use a new lower diaphragm plate gasket
(key 31). Install the parts on the pusher post in the
order listed below:
• Lower diaphragm plate gasket (key 7)
• Lower diaphragm plate (key 6)
• Diaphragm and plate assembly (key 5) pattern side up
• Lower spring seat (key 4)
14. Lubricate the diaphragm cap screw threads (key
30) and insert the cap screw to secure the diaphragm
parts to the pusher post (key 8). Carefully tighten to a
torque of 7 to 9 foot-pounds (9 to 12 N•m).
15. Install the assembled parts in the lower casing
(key 20). Make sure that the lever (key 9) fits in the
pusher post (key 8) and that the holes in the diaphragm
align with the holes in the lower casing.
16. Install the spring case (key 23) on the lower
casing assembly (key 20) so that the vent assembly
(key 56) is correctly oriented, and secure with the cap
screws (key 21) and hex nuts (key 22) fingertight only.
17. Insert the control spring (key 1) into the spring
case (key 23), followed by the upper spring seat (key 4
or 44) and adjusting screw (key 2).
18. Turn the adjusting screw (key 2) clockwise until
there is enough control spring (key 1) force to provide
proper slack to the diaphragm (key 5). Using a crisscross
pattern, finish tightening the cap screws (key 21) and
hex nuts (key 22) to 18 to 21 foot-pounds (24 to 28 N•m)
of torque. To adjust the outlet pressure to the desired
setting, refer to the Startup and Adjustment section.
19. Install a replacement closing cap gasket (key 35)
if necessary, and then install the closing cap (key 3).
20. Connect the downstream control line and refer to
the Startup section before putting the regulator back in
operation.
Parts Ordering
When contacting your Fisher sales office or sales
representative about this regulator, include the type
number and all other pertinent information stamped on
the nameplate.
Parts List
In this parts list, parts marked NACE are intended for
corrosion-resistant service as detailed in the National
Association of Corrosion Engineers (NACE) standard
MR0-175-90.
Type Y693 Regulator (figures 3, 4 & 5)
Aluminum lower casing version (figures 3 & 4)
Key Description Part Number
1 Control Spring, pl steel See table 2
2 Adjusting Screw
0.5 to 32-inches w.c. (1.2 to 78 mbar) springs 1A589644022
1 to 5 psig (0.07 to 0.34 bar) springs 1L928608012
2 to 5.5 psig (0.14 to 0.37 bar) spring 1A500528982
4 to 10 psig (0.27 to 0.69 bar) spring 1A500528982
3 Closing Cap
0.5 to 32-inches w.c. (1.2 to 78 mbar) springs 1A589544022
1 to 5 psig (0.07 to 0.34 bar) springs 1A589544022
2 to 5.5 psig (0.14 to 0.37 bar) spring 1H798714012
4 to 10 psig (0.27 to 0.69 bar) spring 1H798714012
Continued on page 11

Type Y693
8
ONLY USED WITH THE FOLLOWING CONTROL SPRINGS:
BROWN—0.5 TO 2 INCHES WC (1.2 TO 6.7 MBAR)
RED—2 TO 5 INCHES WC (1.2 TO 12 MBAR)
BLACK—5 TO 8 INCHES WC (12 TO 19 MBAR)
GRAY—8 TO 18 INCHES WC (19 TO 44 MBAR)
DARK GREEN—18 TO 32 INCHES WC (44 TO 78 MBAR)
34B4867-A
ONLY USED WITH THE FOLLOWING CONTROL SPRINGS:
DARK BLUE—1 TO 2 PSIG (0.07 TO 0.14 BAR)
ORANGE—1.5 TO 3.3 PSIG (0.10 TO 0.23 BAR)
YELLOW—2 TO 5 PSIG (0.14 TO 0.34 BAR)
ONLY USED WITH GREEN STRIPE
2 TO 5.5 PSIG (0.14 TO 0.37 BAR) AND
SILVER — 4 TO 10 PSIG (0.27 TO 0.66 BAR)
CONTROL SPRINGS
Figure 3. Type Y693 Adjusting Screw/Control Spring Combinations
34B4832-B
34B4869-A

Type Y693
9
APPLY LUB
54B2264-B
Figure 4. Type Y693 Regulator, Aluminum Lower Casing Version
SECTION
A-A
VIEW B
A
A

Type Y693
10
SECTION
A-A
VIEW B
A
A
Figure 5. Type Y693 Regulator, Steel or Stainless Steel Lower Casing Version
APPLY LUB
54B2266-B
CONTROL LINE
CONNECTION

Type Y693
11
Key Description Part Number
4 Lower Control Spring Seat, plated steel
0.5 to 32-inches w.c. (1.2 to 78 mbar) springs 14B4240X012
1 to 5 psig (0.07 to 0.34 bar) springs 14B4240X012
2 to 5.5 psig (0.14 to 0.37 bar) spring 1A500528982
4 to 10 psig (0.27 to 0.69 bar) spring 1A500528982
5* Diaphragm Assembly
0.5 to 32 inches w.c. (1.2 to 78 mbar) springs
Nitrile 14B3350X012
Fluoroelastomer 14B3350X022
1 to 10 psig (0.07 to 0.69 bar) springs
Nitrile 14B3350X032
Fluoroelastomer 14B3350X042
8 Pusher Post, stainless steel 1L143311992
9 Lower Casing Assembly, aluminum 1H9751X0022
10* Clevis Pin, pl steel 14B2155X012
11 Machine Screw, stainless steel (2 req’d) 1B420428982
12 Machine Screw, stainless steel 1A8664X00A2
13 Stem, stainless steel 24B1765X012
14* Cotter Pin, stainless steel 1A866537022
15* Stem O-ring
Nitrile 1E216306992
Fluoroelastomer 1L949306382
16* Body Gasket
Nitrile T12587T0012
Fluoroelastomer T12587T0022
18 Cap Screw, plated steel (2 req’d) 1H974724052
21 Diaphragm Case Cap Screw, plated steel
(12 req’d) 1B136324052
22 Hex Nut, zinc plated steel (12 req’d) 1A309324122
23 Spring Case, aluminum AE6180X0012
25* Disk Holder, stainless steel 24B1952X012
27 Orifice, stainless steel, 1/2-inch (12.7 mm) 1A928835032
28 Body
Cast Iron
NPT
1-1/2 x 1-1/2-inch size 14B3192X012
2 x 2-inch size 14B3192X022
Class 125 FF Flanged, 2 x 2-inch size 14B3193X012
Class 250 RF Flanged, 2 x 2-inch size 14B3193X022
WCB Steel
NPT
1-1/2 x 1-1/2-inch size 14B3192X032
2 x 2-inch size 14B3192X042
Class 150 RF Flanged
1-1/2 x 1-1/2-inch size 14B4053X012
2 x 2-inch size 14B4053X022
Class 300 RF Flanged
1-1/2 x 1-1/2-inch size 14B4053X032
2 x 2-inch size 14B4053X042
DIN Class PN 16, 25 & 40 RF Flanged
1-1/2 x 1-1/2-inch size 14B4053X052
2 x 2-inch size 14B4053X062
30 Cap Screw
0.5 to 32-inches w.c. (1.2 to 78 mbar) springs 1A667824052
1 to 5 psig (0.07 to 0.34 bar) springs 1B720924052
2 to 5.5 psig (0.14 to 0.37 bar) spring 1E4539X0012
4 to 10 psig (0.27 to 0.69 bar) spring 1E4539X0012
35* Closing Cap Gasket, neoprene 1N446206992
44 Spring Seat 0Y095644012
49 Lever Assembly, stainless steel 1H974028992
50 Nameplate - - - - - - - - - - -
51 Drive Screw - - - - - - - - - - -
56 Vent Assembly Type Y602-8, plastic 17A6573X022
63 Wiper Retaining Ring 14B2153X012
64* Bushing O-Ring
Nitrile 1L142906992
Fluoroelastomer 1P1676X0032
66* PTFE Wiper 14B1553X012
69* PTFE Back-up ring (2 req’d) 14B2150X012
72 Reducing Nipple, plastic 14B3323X012
74 Bushing Snap Ring, stainless steel 1L142838992
75 Elbow, plastic 14B3191X012
79 Pin, stainless steel 1H972935032
Key Description Part Number
80 Lubricant - - - - - - - - - - -
85 Bias Spring, stainless steel 14B2154X012
93 Hex Nut, zinc plated steel
2 to 5.5 psig (0.14 to 0.37 bar) spring 1A352424122
4 to 10 psig (0.27 to 0.69 bar) spring 1A352424122
97 Body Bushing, aluminum 24B1454X012
98 Disk Washer, stainless steel 14B1954X012
99* Disk
Nitrile 14B1953X032
Fluoroelastomer 14B1953X022
Steel and Stainless Steel lower casing ver-
sion (figures 3 & 5)
Key Description Part Number
1 Control Spring, plated steel See table 2
2 Adjusting Screw
0.5 to 32-inches w.c. (1.2 to 78 mbar) springs 1A589644022
1 to 5 psig (0.07 to 0.34 bar) springs 1L928608012
2 to 5.5 psig (0.14 to 0.37 bar) spring 1A500528982
4 to 10 psig (0.27 to 0.69 bar) spring 1A500528982
3 Closing Cap
0.5-inches w.c. to 5 psig (1.2 to 340 mbar) springs
Aluminum 1A589544022
Steel 1J880124092
Stainless Steel 1J8801X0022
2 to 5.5 psig (0.14 to 0.37 bar) spring, brass 1H798714012
4 to 10 psig (0.27 to 0.69 bar) spring, brass 1H798714012
4 Lower Control Spring Seat, plated steel
0.5 to 32-inches w.c. (1.2 to 78 mbar) springs 14B4240X012
1 to 5 psig (0.07 to 0.34 bar) springs 14B4240X012
2 to 5.5 psig (0.14 to 0.37 bar) spring (2 req’d) 1H7974X0012
4 to 10 psig (0.27 to 0.69 bar) spring (2 req’d) 1H7974X0012
5* Diaphragm Assembly
0.5 to 32 inches w.c. (1.2 to 78 mbar) springs
Nitrile 1N9721X0012
Fluoroelastomer 1N9721X0022
1 to 10 psig (0.07 to 0.69 bar) springs
Nitrile 1N9722X0012
Fluoroelastomer 1N9722X0022
6 Lower Diaphragm Plate
Stainless steel 0V003935032
Stainless steel (NACE) 0V0039X0022
7* Diaphragm Plate Gasket, composition 1A348704022
8 Pusher Post
Stainless steel 0Y096435072
Stainless steel (NACE) 0Y096435072
9 Lever Assembly
Stainless steel 1E3409X0052
Stainless steel (NACE) 1E3409X0052
11 Machine Screw, stainless steel (2 req’d) 1A866935032
12 Machine Screw, stainless steel 1A8664X00A2
13 Stem
Stainless steel 24B1975X012
Stainless steel (NACE) 24B1975X022
15* Stem O-ring
Nitrile 15A6080X012
Fluoroelastomer 1L949306382
FFKM 15A6080X022
16* Body Gasket, composition 1A348004032
17 Snap Ring, steel 0Y095828982
19 Union Nut
WCB Steel 0Z017624092
Stainless Steel 0Z0176X0012
WCB Steel (NACE) 0Z017624092
20 Lower Casing Assembly
WCB steel 34B1452X012
Stainless steel 34B1452X022
21 Diaphragm Case Cap Screw, plated steel
(12 req’d) 1B136324052
22 Hex Nut, zinc pl steel (12 req’d) 1A309324122

Type Y693
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
or implied, regarding the products or services described herein or their use or applicability. We reserve the right to modify or improve the designs or specifications of such products at any time without notice.
Fisher does not assume responsibility for the selection, use or maintenance of any product. Responsibility for proper selection, use and maintenance of any Fisher product remains solely with the purchaser.
For information, contact Fisher:
Marshalltown, Iowa 50158 USA
McKinney, Texas 75070 USA
28320 Gallardon, France
40013 Castel Maggiore (BO), Italy
Sao Paulo 05424 Brazil
Singapore 128461
www.FISHERregulators.com
©Fisher Controls International, Inc., 1994; All Rights Reserved
Key Description Part Number
23 Spring Case
Aluminum AE6180X0012
WCB steel 34B2157X012
Stainless steel 34B2157X022
25* Disk Holder
Stainless steel 24B1952X012
Stainless steel (NACE) 24B1952X022
27 Orifice
Stainless Steel, 1/2-inch (12.7 mm) 0L040135032
Stainless steel (NACE), 1/2-inch (12.7 mm) 0L0401X0012
28 Body
WCB Steel
NPT
1-1/2 x 1-1/2-inch size 14B3194X012
2 x 2-inch size 14B3194X022
Class 150 RF Flanged
1-1/2 x 1-1/2-inch size 14B3195X012
2 x 2-inch size 14B3195X022
Class 300 RF Flanged
1-1/2 x 1-1/2-inch size 14B3195X032
2 x 2-inch size 14B3195X042
DIN Class PN 16, 25 & 40 Raised Face
1-1/2 x 1-1/2-inch size 14B3195X092
2 x 2-inch size 14B3195X102
Stainless steel
NPT
1-1/2 x 1-1/2-inch size 14B3194X032
2 x 2-inch size 14B3194X042
Class 150 RF Flanged
1-1/2 x 1-1/2-inch size 14B3195X052
2 x 2-inch size 14B3195X062
Class 300 RF Flanged
1-1/2 x 1-1/2-inch size 14B3195X072
2 x 2-inch size 14B3195X082
DIN Class PN 16, 25 & 40 RF Flanged
1-1/2 x 1-1/2-inch size 14B3195X112
2 x 2-inch size 14B3195X122
WCB Steel (NACE)
NPT
1-1/2 x 1-1/2-inch size 14B3194X052
2 x 2-inch size 14B3194X062
30 Cap Screw, plated steel
0.5 to 32-inches w.c. (1.2 to 78 mbar) springs 1A667824052
1 to 5-inches psig (0.07 to 0.34 bar) springs 1B720924052
2 to 5.5 psig (0.14 to 0.37 bar) spring 1E4539X0012
4 to 10 psig (0.27 to 0.69 bar) spring 1E4539X0012
Key Description Part Number
35* Closing Cap Gasket, neoprene 1N446206992
44 Spring Seat, aluminum 0Y095644012
50 Nameplate - - - - - - - - - - -
51 Drive Screw - - - - - - - - - - -
56 Vent Assembly Type Y602-8, plastic 17A6573X022
64* Bushing O-Ring
Stainless steel trim
Nitrile 1C782106992
Fluoroelastomer 1N163206382
FFKM 1C7821X0052
Stainless steel trim (NACE)
Neoprene 15A6078X012
Fluoroelastomer 1N163206382
FFKM 1C7821X0052
66* PTFE Wiper 14B1553X012
69* PTFE Back-up ring (2 req’d) 14B2150X012
72 Reducing Nipple, plastic 14B3323X012
74 Bushing Snap Ring
Stainless steel 14B1764X012
Stainless steel (NACE) 14B1764X022
75 Elbow, plastic 14B3191X012
80 Lubricant - - - - - - - - - - -
85 Bias Spring
Stainless steel 14B2154X012
Stainless steel (NACE) 14B3540X012
93 Hex Nut, plated steel
2 to 5.5 psig (0.14 to 0.37 bar) spring 1A352424122
4 to 10 psig (0.27 to 0.69 bar) spring 1A352424122
97 Body Bushing
Stainless steel 24B1455X012
Stainless steel (NACE) 24B1455X022
98 Disk Washer, stainless steel 14B1954X012
99* ` Disk
Stainless steel trim
Nitrile 14B1953X032
Fluoroelastomer 14B1953X022
FFKM 14B1953X052
Stainless steel trim (NACE)
Neoprene 14B1953X042
Fluoroelastomer 14B1953X022
FFKM 14B1953X052