Page 1
Instruction Manual
Form 5252
07/89
Incorporates Errata dated January 2001
627 Series Pressure Reducing Regulators
627 Series
Introduction
Scope of Manual
This manual provides instructions for the installation,
adjustment, maintenance, and parts ordering for the
627 Series regulators. These regulators usually are
shipped separate for line installation, although sometimes they are shipped installed on other equipment.
Refer to the instruction manual for the other equipment
for installation and operating instructions.
Description
The 627 Series self-operated pressure reducing regulators (figure 1) are for high and low pressure systems.
These regulators can be used with natural gas, air, or a
variety of other gases. P erf ormance characteristics
vary according to construction (see the AVAILABLE
CONFIGURA TIONS specification in tab le 1).
Specifications
Table 1 gives some general specifications f or the 627
Series regulators. The nameplates (figure 2) giv es
detailed information for a particular regulator as it
comes from the factory.
W4793
Figure 1. Typical 627 Series Self-Operated
Pressure Reducing Regulator
Regulators
NUMBER 1
10B3679-D
NUMBER 2
Figure 2. Nameplates
D101328X012
www.FISHERregulators.com
Page 2
627 Series
T ab le 1. Specifications
Av ailable Constructions
T ype 627: Self-oper ated pressure reducing regulator
equipped with a pitot tube for greater regulated
capacities (figure 7)
Type 627R: Type 627 with internal relief and with an
open throat (figure 8)
Type 627M: Type 627 with a stem seal between the
body outlet pressure and diaphragm case. Pressure
is measured under the diaphragm through the
1/4-inch NPT downstream control line connection
(figure 9)
Type 627MR: T ype 627M with internal relief (figure 10)
Type 627H: Type 627 with a diaphragm limiter to
deliver a higher outlet pressure (figure 11)
Type 627HM: Type 627H with a stem seal between
the body outlet pressure and diaphragm case.
Pressure is measured under the diaphragm through
two 1/4-inch NPT downstream control line
connections (figure 12)
Body Sizes
3/4, 1, or 2-inch
End Connection Styles
3/4, 1, or 2-inch body sizes: NPT
1 or 2-inch body sizes: ANSI Class 300 or 600 RF
flanged
Maximum Inlet Pressure
(1)
(Body Rating)
2000 psig (138 bar) for NPT steel, 1480 psig
(102 bar) for RF flanged steel, or 1000 psig (69 bar)
for ductile iron
Maximum V alve Disk Inlet Pressure Rating
(1)
2000 psig (138 bar) for nylon disk or 1000 psig (69
bar) for nitrile disk
Maximum Operating Inlet Pressure, Pressure
Differential, and Outlet Pressure Ranges
(1)
See table 2 for pressures by port and spring range
Maximum Spring and Diaphragm Casing Pressure
See table 3
Maximum Body Outlet Pressure(1) (T ype 627M,
627MR, and 627HM Only)
2000 psig (138 bar) for screwed steel, 1480 psig
(102 bar) for RF flanged steel, or 1000 psig (69 bar)
for ductile iron. (Type 627 and 627R are limited by
maximum diaphragm casing pressure)
Port Diameters
See table 2
Internal Relief Performance
Type 627R: See table 4
Type 627MR: Limited by field-installed control line
piping
Temperature Capabilities
(1)
-20 to 180°F (-29 to 82°C)
Pressure Registration
T ype 627, 627H or 627R: Internal
Type 627M, 627HM or 627MR: External through
1/4-inch NPT control line connection in the
diaphragm casing
De-Icer System
See figure 3 and Type 627M Regulator De-Icer
System Application section
Relief Indicator
For 627R and 627MR (see figures 8 and 9)
Spring Case Vent Connection
3/4-inch NPT female with removable screened vent
assembly
Control Line Connection (T ype 627M, 627HM or
627MR Only)
1/4-inch NPT female
Approximate Weight
Ductile Iron or Steel Casings: 10 pounds (4,5 kg)
(1)
Aluminum Casings: 6.3 pounds (2.8 kg)
1. The pressure/temperature limits in this instruction manual or any applicable standard limitation should not be exceeded.
2
Page 3
627 Series
T able 2. Maxim um Inlet Pressures, Differential Pressures , and Outlet Pressure Ranges
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Page 4
627 Series
T able 3. Maximum Spring and Diaphragm Casing Pressure(1)
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Personal injury , property damage, equipment damage, or leakage due to escaping
gas or bursting of pressure-containing
parts may result if this regulator is overpressured or is installed where service
conditions could exceed the limits given
in tables 1, 2, 3, and 4, or where conditions exceed any ratings of the adjacent
piping or piping connections.
T o av oid such injury or damage, provide
pressure-relieving or pressure-limiting
devices (as required by the appropriate
code, regulation, or standard) to prevent
service conditions from exceeding those
limits. The T ype 627R or 627MR regulator
with internal relief will provide downstream overpressure protection within the
limits given in tables 1, 2, 3 and 4. If these
limits are exceeded additional downstream overpressure protection must be
provided by the user .
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 location.
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Like most regulators, 627 Series regulators have outlet
pressure ratings that are lower than their inlet pressure
ratings. A pressure relieving or pressure limiting device
must be provided by the user f or the Type 627, 627H,
627M, and 627HM regulators if the inlet pressure can
exceed the outlet pressure rating, since these regulators do not have internal relief.
T ype 627R regulators provide internal relief which limits
the total outlet pressure buildup over setpoint. Use table
4 to determine the total outlet pressure. This internal
relief may be adequate for the application, if not,
provide additional pressure relief or a pressure limiting
device downstream.
Note
If the regulator is shipped mounted on
another unit, install that unit according to
the appropriate instruction manual.
Perf orm steps 1 through 6 for all types of regulators:
1. Only personnel qualified through training and
experience should install, operate, or maintain this
regulator.
2. For a regulator that is shipped separately, make
sure that there is no damage to, or foreign material in,
the regulator.
Installation
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. Key n umbers referenced in this section are shown
in figures 7 through 12. Ensure that the operating temperature capabilities listed in table 1 are not exceeded.
4
3. Ensure that all tubing and piping have been blown
free of foreign debris.
4. The regulator may be installed in any position as
long as the flow through the body is in the direction
indicated by the arrow cast on the body.
5. If continuous operation is required during inspection
or maintenance, install a three-valve bypass around the
regulator.
Page 5
627 Series
Figure 3. Schematic of De-Icer System
A regulator may vent some gas to the
atmosphere. In hazardous or flammable
gas service, vented gasmay accumulate
and cause personal injury , death, or
property damage due to fire or explosion.
Vent a regulator in hazardousgas service
toa remote, safe location away from air
intakes or any hazardous area. The vent
line or stack opening must be protected
against condensation or clogging.
6. Position the body (ke y 1) and/or diaphragmspring
case (key 29) so it will not collectmoisture or debris into
the screened vent. If the regulator requires repositioning, refer to the body area maintenance procedures
and/or the diaphragm case area maintenance procedures in the Maintenance section to reposition the
screened vent for the application.
Perform steps 7 through 9 f or T ypes 627M, 627HM,
and 627MR regulators only:
7. A Type 627M, 627HM, or 627MR regulator requires
a downstream control line. Install the control line before
putting the regulator into operation.
8. Ensure that the downstream control line piping is at
least 3/8-inch or larger outside diameter tubing and
connected to a straight section of outlet piping 10
diameters downstream of the regulator.
9. A hand valve should be installed in the control line.
This hand valve can be used to throttle down and
dampen outlet pulsations in control pressure which may
cause unstability or cycling of the regulator.
Remote Vent Line Installation
All 627 series regulators have a vent assembly installed
in the 3/4-inch NPT spring case vent opening. The v ent
assembly can be removed to install a remote vent line if
necessary. Remote vent lines must hav e the largest
practical diameter. The vent line should be as short as
possible with a minimum number of bends or elbows.
Protect the remote vent opening against entrance of
rain, snow , or any other foreign material that may plug
the vent or vent line and prevent proper operation of the
regulator. P eriodically check the vent opening to be sure
it is not plugged with foreign debris.
Type 627M or 627HM Regulator DeIcer System Application
For the T ype 627M or 627HM regulator de-icer system,
refer to the application shown in figure 3. With a large
pressure drop across the working regulator, ice can
5
Page 6
627 Series
T able 4. Type 627R Internal Relief Performance
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form with in this regulator. The f ormation of ice decreases the size of the port opening, so the regulator is
unable to supply enough flow to satisfy the downstream
demand. When the downstream pressure f alls below the
outlet pressure setting of the Type 627M or 627HM
regulator, the disk assembly of the Type 627Mor
627HMregulator moves off its seat ring, permitting
alcohol to flow into the main gas line. The alcohol
carried to the main regulator by the flow stream prevents additional ice from forming on the seat ring. When
normal flow resumes, and as pressure in the downstream system is restored, the Type 627M or 627HM
regulator shuts off.
6
Startup and Adjustment
Startup
To a v oid personal injury or property damage due to explosion or damage to regulator or downstream components during
startup, release downstream pressure to
prevent an overpressure condition on the
diaphragm of the regulator.
Page 7
627 Series
)8,57(0011
)011(0061
)831(0002
)831(0002
)831(0002
)5,65(028
)5,69(0041
)131(0091
)831(0002
)831(0002
)1,13(054
)8,57(0011
)711(0071
)831(0002
)831(0002
)6,85(058
)5,69(0041
)831(0002
)831(0002
)5,43(005
)7,28(0021
)711(0071
)831(0002
)4,14(006
)7,28(0021
)831(0002
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(1)
(continued)
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)7,28(0021
)011(0061
)6,72(004
)8,44(056
)3,84(007
)8,57(0011
)301(0051
)6,81(072
)2,73(045
)8,35(087
)0,96(0001
)5,69(0041
)6,92(034
)2,64(076
)4,36(029
)6,98(0031
)7,02(003
)9,73(055
)2,55(008
)7,28(0021
)6,72(004
)4,34(036
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)5,61(042
)9,53(025
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)2,64(076
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)1,31(091
)7,02(003
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)9,71(062
)2,62(083
)9,64(086
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)9,51(032
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)9,51(032
)0,02(092
)4,32(043
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)8,22(033
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)1,31(091
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)4,12(013
)0,92(024
)7,11(071
)9,51(032
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)6,72(004
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)6,81(072
)9,62(093
)8,31(002
)2,71(052
)8,42(063
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)1,42(053
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)9,51(032
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)5,41(012
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T able 4. Type 627R Internal Relief Perf ormance
TELTUO
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)3,01(051)2,71(052)7,28(0021)9,71(062)9,71(062)9,71(062)9,71(062)9,71(062
MUMIXAM
(GISPrab)
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)831(0002
)831(0002
)831(0002
)831(0002
)831(0002
)5,69(0041
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In order to avoid an overpressure condition and possible equipment damage,
pressure gauges should always be used
to monitor pressures during startup.
1. Slowly open the upstream shutoff valve.
2. Slowly open the downstream shutoff valve.
3. Check all connections for leaks.
4. Make final control spring adjustments according to
the adjustment procedures.
Adjustment
The range of allowable pressure settings is marked on
the nameplate (figure 2). If a pressure setting beyond
this range is necessary, substitute the appropriate
regulator control spring. Change the nameplate to
indicate the new pressure range.
Before increasing the setting, refer to tables 2, 3, or 4.
Review the pressure limits for the control spring range
being used and be certain that the new pressure setting
will not result in an overpressure condition.
7
Page 8
627 Series
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64
T able 5. Maximum T orque Values
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Note
Always use a pressure gauge to monitor
pressure when making adjustments.
Refer to figures 7 through 12 for key number locations.
1. Remove the adjusting screw cap (key 36).
2. Loosen the locknut (key 34).
3. Increase the outlet pressure setting by turning the
adjusting screw (key 35) clockwise. Decrease the outlet
pressure setting by turning the adjusting screw counterclockwise.
4. When the desired pressure is obtained, hold the
adjusting screw (key 35) in place and tighten the
locknut (key 34).
Shutdown
T o av oid personal injury or property damage due to explosion or damage to regulator or downstream components during
shutdown, release downstream pressure to
prevent an overpressure condition on the
diaphragm of the regulator.
1. Close the nearest upstream shutoff valve.
2. Close the nearest downstream shutoff valve.
3. Open the vent valve between the regulator and the
downstream shutoff valve nearest to it.
4. For a Type 627, 627H, or 627R regulator, the
regulator will open to release pressure between the
upstream shutoff valve and the regulator .
5. A Type 627M, 627HM, or 627MR regulator requires
venting the control line and downstream pressure from
the regulator before maintenance. The pressure between
these shutoff valves is released through the open
regulator because the disk assembly remains open in
response to the decrease in control line pressure.
Maintenance
Unless otherwise specified, the following maintenance
procedures apply to all types of regulators. For a
summary of maximum torque values required for all
types of regulators, refer to table 5.
Due to normal wear, damage from e xternal sources, or
debris in the air or gas line, regulator parts such as the
disk assembly, seat ring, and diaphragm must be
inspected periodically and replaced as necessary to
ensure correct performance. The frequency of inspection and replacement depends upon the severity of
conditions and the requirements of state and federal
laws. Normal wear of the seat ring and disk assembly is
accelerated with high pressure drops and with large
amounts of impurities in the flow stream. Instructions
are given below f or replacing the disk assembly, seat
ring, diaphragm, and O-rings. These procedures may
also be used for disassembly required for inspection
and replacement of other parts.
8
Page 9
Problem Indication for Type 627R and
627MR Regulators
Isolate the regulator from all pressure to
avoid personal injury and equipment
damage due to explosion or sudden
release of process pressure. Cautiously
release pressure from the regulator
before attempting disassembly .
W4665*
627 Series
RELIEF
INDICATOR
CAP (KEY 49)
The vent assembly is equipped with a relief indicator
(key 49, figure 4). The cap f or the relief indicator snaps
over the vent assembly opening. If the relief valve
opens wide, exhaust gas pops the cap off the screen
vent assembly opening indicating a problem with the
regulator. If the cap pops off, refer to the shutdown and
to the body area maintenance procedures to inspect the
disk assembly and seat ring.
If the disk assembly and seat ring are not damaged,
refer to the diaphragm and spring case area maintenance procedures in this section.
The disk assembly and seat ring can be inspected,
removed, and replaced without removing the regulator
body from the line connections. Refer to the body area
maintenance procedures.
Body Area Maintenance Procedures
These procedures are for gaining access to the disk
assembly, seat ring, diaphragm casing O-ring and stem
assembly. All pressure must be released from the
diaphragm casing before the performing these steps.
While using the following procedures, refer to figures 7
through 12 for key number locations.
Replacing the Disk Assembly or Seat Ring
1. To inspect and replace the disk assembly (key 9) or
seat ring (key 2), remove the cap screws (key 3, figure
5), and separate the diaphragm casing (key 5) from the
body (key 1).
2. Inspect and, if necessary , remo ve the seat ring
(key 2). If removed, coat the threads of the replacement seat ring with lubricant (key 38) and torque to 25
foot-pounds (34 N•m).
Figure 4. Relief Indicator
Replacing the Stem Assembly
If it is necessary to perform maintenance on the stem
assembly, continue with steps 4 through 8 and 15
through 19 for Type 627, 627H, and 627R regulators, or
steps 9 through 19 for Type 627M, 627HM, and 627MR
regulators.
Perform steps 4 through 8 f or Type 627, 627H, and
627R Regulators only:
4. ForType 627, 627H, and627R regulators (figure 5),
use steps 5 through 8 to remove and replace the stem
assembly.
5. Remove the boost body (key 6), stabilizer (key 7),
and stem guide (key 8) from the diaphragm casing (key
5). Unhook and remove the stem (key 10) from the
diaphragm casing (key 5).
6. Remove and inspect the diaphragm casing O-ring
(key 4, figure 7, 8, or 11) and replace it if necessary.
7. Apply lubricant (key 42) to a replacement diaphragm casing O-ring (key 4, figure 7, 8, or 11) and
install it onto the boost body (key 6). Skip to step 14.
8. For the Type 627 or 627H regulators, be sure to
insert the pitot tube (tab) into the outlet side of the body
(see figure 7 or 11). Skip to step 14.
Perform steps 9 through 19 f or Type 627M, 627HM,
and 627MR Regulators only:
9. For T ype 627M, 627HM, and 627MR regulators
(figure 5), use steps 10 through 14 to remove and
replace the stem assembly.
3. Inspect the disk assembly and, if necessary,
remove the hair pin clip (key 13) that holds the disk
assembly (key 9) in place. If replacing the disk assembly is the only maintenance required, skip to step 16.
10. To remove the blocked throat (key 43), insert a
screw driver blade into the groove provided in the throat
and pry it out of the diaphragm casing (key 5). Inspect
and replace parts as necessary .
9
Page 10
627 Series
LEVER
(KEY 15)
DIAPHRAGM
CASING (KEY 5)
W4792*
W4791*
STEM (KEY 10)
STEM BACKUP
RINGS
(KEY 12)
STEM O-RING
(KEY 11)
DIAPHRAGM CASING
O-RING (KEY 4)
STEM GUIDE
(KEY 8)
STABILIZER
(KEY 7)
BOOST BODY
(KEY 6)
Type 627 and 627R
BLOCKED THROAT
BACKUP RINGS (KEY 45)
BLOCKED THROAT
(KEY 43)
Type 627M amd 627MR
Figure 5. Stem Assemblies
HAIR PIN CLIP
(KEY 13)
DISK
ASSEMBLY
(KEY 9)
PITOT TUBE
AND TAB FOR
TYPE 627 ONL Y
BLOKED THROAT
O-RINGS (KEY 44)
SEAT RING
(KEY 2)
BODY
(KEY 1)
CAP SCREW
(KEY 3)
11. Inspect and, if necessary, replace the b loc k e d
throat O-rings (key 44, figure 5) and backup rings (key
45, figure 5).
12. Apply lubricant (key 42) to replacement blocked
throat O-rings (key 44) and backup rings (key 45).
13. Apply lubricant (key 42) to the replacement stem
O-ring (key 11) and stem backup rings (key 12) and
install them on the stem (key 10).
14. For assembly, insert the stem (key 10) into the
diaphragm casing (key 5) and hook it on the lever (key
15).
15. Insert parts into the diaphragm casing (key 5) that
were removed in steps 5 and 6 or step 10 (see figure 5).
16. Install the the disk assembly (key 9), line up the
hole in the disk assembly and stem (key 10) and insert
the hair pin clip (key 13).
17. Position the diaphragm casing plus attached parts
in relation to the body (key 1) so that they are correct
for the application.
18. Secure the diaphragm casing to the body with the
cap screws (key 3, figure 5). For an aluminum diaphragm casing (key 5), torque the cap screws (key 3)
to 16 foot-pounds (22 N•m). For ductile iron or steel
diaphragm casings, torque the cap screws (key 3) to 25
foot-pounds (34 N•m).
19. It may be necessary to reposition the diaphragm
spring case to prevent rain, ice, and foreign debris from
entering the spring case. Refer to the diaphragm and
spring case area maintenance procedures, steps 1, 2,
and 21 through 25.
Diaphragm and Spring Case Area Maintenance Procedures
These procedures are for gaining access to the control
spring, diaphragm assembly, and lever assembly. All
spring pressure must be released from the diaphragm
casing before these steps can be performed.
While using the following procedures, refer to figures 7
through 12 for key number locations.
1. Remove the adjusting screw cap (key 36), loosen
the lock nut, and turn the adjusting screw (key 35)
counterclockwise until all compression is removed from
the control spring (key 32).
2. Remove the spring case cap screws (key 37), the
nameplates, and lift off the spring case (key 29). If
changing the control spring (key 32) or repositioning the
spring case (key 29) is the only maintenance required,
install the replacement control spring or rotate the
spring case so it is correct for the application. Skip to
step 21. For diaphragm area maintenance, continue with
step 3.
10
Page 11
RELIEF VALVE O-RING
(KEY 28)
DIAPHRAGM
(KEY 23)
DIAPHRAGM
HEAD (KEY 24)
627 Series
PUSTHER POST
(KEY 19)
W4668*
RELIEF SEAL
RETAINER (KEY 47)
PUSTHER POST
(KEY 19)
W5433-1*
DIAPHRAGM
(KEY 23)
PUSTHER POST
O-RING (KEY 52)
DIAPHRAGM CONNECTOR
ASSEMBLY (KEY 21)
Type 627
DIAPHRAGM LIMITER
O-RING (KEY 51)
DIAPHRAGM
HEAD (KEY 24)
DIAPHRAGM
HEAD CAP
SCREW (KEY 46)
Type 627H amd 627HM
Figure 6. Diaphragm Assemblies
DIAPHRAGM CONNECTOR
NUT (KEY 22)
SPRING (KEY 32)
LOWER SPRING
SEAT (KEY 31)
UPPER SPRING
SEAT (KEY 33)
DIAPHRAGM
LIMITER (KEY 50)
GUIDE RETAINER
O-RING (KEY 48)
GUIDE RETAINER
(KEY 26)
3. Remove the diaphragm limiter and O-ring (keys 50
and 51, on the Type 627H or 627HM only). Remove the
diaphragm assembly by tilting it so that the pusher post
(key 19) slips off the lever (key 15).
4. If it is necessary to replace the lever assembly,
remove the lever cap screws (key 18).
5. Install the replacement lever (key 15) into the lever
retainer (key 16) b y inserting the lever pin (ke y 17).
Secure the lever assembly into the diaphragm casing
with the cap screws (key 18) and torque the cap screws
to 7 foot-pounds (9 N•m).
If it is necessary to perform maintenance on the
diaphragm assembly, continue with steps 6 through 11
and step 20 for Type 627, 627H, 627M, and 627HM
regulators, or steps 12 through 19 for Type 627R and
627MR regulators.
Perform steps 6 through 11 f or T ype 627, 627H,
627M, and 627HM Regulators only:
6. For Type 627, 627H, 627M, and 627HM regulators
(figures 5 & 6), use steps 7 through 11 to disassemble
and reassemble the diaphragm assembly.
7. Remove the diaphragm head cap screw (key 46),
lower spring seat (ke y 31,T ype 627 or 627Monly), and
diaphragm head (key 24). On the T ype 627H or 627HM,
remove the diaphragm cap screw O-rings (key 52).
Separate the diaphragm (key 23) from the pusher post
(key 19).
8. Install the diaphragm (key 23), in reverse order in
step 7, on the pusher post (key 19), insert and finger
tighten the diaphragm head cap screw (key 46).
9. Hook the pusher post on the lever (key 15), then
turn the diaphragm (key 23) to match the holes in the
diaphragm with the holes in the spring casing.
10. Unhook the pusher post from the lever and torque
the diaphragm head cap screw (key 46) to 7 footpounds (9 N•m) for the Type 627 or 627M. On the Type
627H or 627HM torque the diaphragm head cap screw
to 14 foot-pounds (18 N•m).
11. Hook the pusher post on the lever (key 15) and
check the hole alignment. If necessary, loosen the cap
screw (key 46) and reposition the diaphragm (key 23)
on the pusher post (key 19). Retorque the screw (see
step 10). Skip to step 20.
11
Page 12
627 Series
Perform steps 12 through 19 f or Type 627R and
627MR Regulators only:
12. For T ype 627R and 627MR regulators (figure 6),
use steps 13 through 19 to disassemble and reassemble the diaphragm assembly:
13. Remove the guide retainer (key 26) and separate
the diaphragm parts. Ref er to figure 6 for the sequence
of parts.
14. To remove the diaphragm (ke y 23), remov e the
diaphragm connector nut (key 22) and lift off the
diaphragm head (key 24) and diaphragm (key 23) from
the connector assembly (key 21). Do not attempt to
disassemble the connector assembly (key 21).
15. Position the replacement diaphr agm (key 23) on
the connector assembly (key 21), install the diaphragm
head (key 24) and connector nut (key 22), then torque
to 17 foot-pounds (32 N•m).
16. If necessary, replace the guide retainer O-ring
(key 48) and, set the guide retainer (key 26) aside,
ready for assembly.
17. On the pusher post (key 19) install the relief seal
O-ring (key 28) and lubricate (key 42). Also, install the
relief seal retainer (key 47), diaphragm connector
assembly (ke y 21, with attached parts) relief spring
(key 27), upper relief spring seat (key 33), and guide
retainer (key 26). Torque the guide retainer (key 26) to 3
foot-pounds (4 N•m).
18. Hook the pusher post (with attached parts) on the
lever (key 15) to check the alignment of the holes in the
diaphragm with the holes in the spring casing. If the
holes do not line up, unhook the pusher post from the
lever , hold the pusher post, and rotate the diaphragm to
the correct position.
19. Install the lower spring seat (key 31) over the relief
spring so it rests flat on the connector nut (key 22).
20. Insert the diaphragm assembly into the diaphragm
casing (key 5) and hook the pusher post on the lever
(key 15).
21. Install the control spring (key 32) and upper spring
seat (key 33), and apply lubricant (key 38) to the upper
spring seat (key 33).
22. Install the spring case (key 29) so that the
screened vent assembly (key 30) is in the correct
position for the application. Place the nameplates (key
39) over the screw holes , insert the spring case cap
screws (key 37), and finger tighten.
23. Screw in the adjustment screw to put slack into the
diaphragm (key 23).
24. Using a crisscross pattern, finish tightening the
spring case cap screws (key 37) to 7 foot-pounds (9
N•m) of torque.
25. If necessary , ref er to the installation and/or the
startup and adjustment procedures.
26. Install the adjusting screw cap (key 34) after
regulator adjustment.
Parts Ordering
When corresponding with your Fisher sales office or
sales representative about this regulator , always
reference the type number which is found on the
nameplate (key 39, figures 7 through 12).
When ordering replacement parts, reference the key
number of each needed part as found in the following
parts list.
Parts List
Key Description Part Number
Type 627 Parts Kit with aluminum/nitrile trim
(includes keys 4, 9, 11, 12, and 23) R627X000A12
Type 627 Parts Kit with stainless steel/nitrile trim
(includes keys 4, 9, 11, 12, and 23) R627X000S12
Type 627R Parts Kit with aluminum/nitrile trim
(includes keys 4, 9, 11, 12, 23, 28, and 48) R627RX00A12
Type 627R Parts Kit with stainless steel/nitrile trim
(includes keys 4, 9, 11, 12, 23, 28, and 48) R627RX00S12
1 Body
Ductile iron
1000 psig (69 bar) max inlet pressure
3/4-inch NPT size 30B3046X012
1-inch NPT size 30B3048X012
2-inch NPT size 30B3096X012
Steel
2000 psig (138 bar) max inlet pressure
3/4-inch NPT size 30B3050X012
1-inch NPT size 30B3051X012
2-inch NPT size 30B7452X012
Steel, ANSI Class 600 RF flanged
1480 psig (102 bar) max inlet pressure
1-inch size 40B6754X012
2-inch size 40B6756X012
2* Seat ring
Aluminum
3/32-inch (2.4 mm) port diameter 0R044109022
1/8-inch (3.2 mm) port diameter 1A936709012
3/16-inch (4.8 mm) port diameter 00991209012
1/4-inch (6.4 mm) port diameter 0B042009012
3/8-inch (9.5 mm) port diameter 0B042209012
1/2-inch (12.7 mm) port diameter 1A928809012
303 Stainless steel
3/32-inch (2.4 mm) port diameter 0R044135032
1/8-inch (3.2 mm) port diameter 1A936735032
3/16-inch (4.8 mm) port diameter 00991235032
1/4-inch (6.4 mm) port diameter 0B042035032
3/8-inch (9.5 mm) port diameter 0B042235032
1/2-inch (12.7 mm) port diameter 1A928835032
*Recommended spare part.
12
Page 13
627 Series
Key Description Part Number
2* Seat ring (continued)
316 Stainless steel, NACE
3/32-inch (2.4 mm) port diameter 0R0441X0012
1/8-inch (3.2 mm) port diameter 1A9367X0022
3/16-inch (4.8 mm) port diameter 009912X0012
1/4-inch (6.4 mm) port diameter 0B0420X0012
3/8-inch (9.5 mm) port diameter 0B0422X0012
3 Cap Screw (not shown), (2 req’d)
4* Diaphragm Case O-Ring (Type 627, 627H, or
5 Diaphragm Case
6 Boost Body (not for Type 627M, 627HM,
7 Stabilizer (for Type 627, 627H, and 627R
8 Stem Guide (for Type 627, 627H, and 627R
9* Disk Assembly (for all port diameters)
10 Stem
11* Stem O-Ring, nitrile 1D687506992
12 Stem Backup Ring, TFE (2 required) 1K786806992
13 Hair Pin Clip, stainless steel 10B3058X012
14 Drive Pin, plated steel 1A953228982
15 Lever, plated steel 20B3063X012
16 Lever Retainer, plated steel 30B3097X012
17 Lever Pin
18 Lever Cap Screw (2 required)
19 Pusher Post, aluminum
21 Diaphragm Connector (for Type 627R
22 Diaphragm Connector Nut (for Type
23* Diaphragm, nitrile
1/2-inch (12.7 mm) port diameter 1A9288X0012
Type 627 and 627R w/aluminum
diaphragm case, pl steel 18A1087X012
All Types w/ductile iron
diaphragm case, pl steel 1C403824052
or steel diaphragm case, pl steel 1C403024052
627R only), nitrile 17A2325X022
For Type 627 or 627R
Aluminum w/o 1/8-inch gauge tap 40B3084X012
Aluminum with 1/8-inch gauge tap
for Type 627 only 11B5380X012
Ductile iron w/o 1/8-inch gauge tap 30B3053X012
Ductile iron with 1/8-inch gauge tap
for Type 627 only 31B0641X012
Steel 30B3104X012
For Type 627M or 627MR
Ductile iron 39A5987X012
Steel 30B8734X012
For Type 627H, steel 30B3104X012
For Type 627HM, steel 30B8734X012
or 627MR), Delrin
For Type 627 or 627H 30B3056X012
For Type 627R 30B3057X012
only), nitrile 10B3060X012
only), powdered metal 20B3061X012
Aluminum holder and nitrile disk 1C4248X0212
303 Stainless steel holder and nitrile disk 1C4248X0202
Aluminum holder and nylon disk 1C4248X00A2
303 Stainless steel holder and nylon disk 1C4248X0062
NACE construction only
Aluminum holder and nitrile disk 1C4248X0212
316 Stainless steel holder and nitrile disk 1C4248X0252
Aluminum holder and nylon disk 1C4248X00A2
316 Stainless steel holder and nylon disk 1C4248X0262
303 stainless steel 10B3059X012
316 stainless steel (NACE) 10B3059X022
Stainless steel 10B3083X012
316 stainless steel (NACE) 10B3083X022
Plated steel 10B7454X012
316 stainless steel (NACE) 10B7454X022
For Type 627 or 627M 10B3098 X012
For Type 627R or 627MR 10B3098 X022
For Type 627H or 627HM,
416 stainless steel 10B3098 X032
or 627MR only), stainless steel 10B6758X012
627R or 627MR only), stainless steel 10B7449X012
For Type 627 or 627M w/aluminum or
ductile iron diaphragm case 10B3069X012
(2)
(1)
construction only
Key Description Part Number
23* Diaphragm, nitrile (continued)
For Type 627 or 627M w/steel
diaphragm case 10B8735X012
For Type 627R or 627MR w/aluminum
or ductile iron diaphragm case 10B3068X012
For Type 627R or 627MR w/steel
diaphragm case 10B8736X012
For Type 627H or 627HM w/steel
diaphragm case (diaphragm is neoprene
with nylon fabric) 12B0178X012
24 Diaphragm Head, plated steel
For Type 627 or 627M, plated steel 1D666428982
For Type 627R or 627MR, plated steel 10B3071X012
For Type 627H or 627HM, 416 stainless steel 12B0175X012
25 Relief Spr ing Seat (for Type 627R or
627MR only), steel 10B7446X012
26 Guide Retainer (for Type 627R or
627MR only), stainless steel 10B7450X012
27 Relief Spr ing (for Type 627R or 627MR
only), plated steel 10B6757X012
28* Relief Seal O-Ring (for Type 627R or
627MR only), nitrile 1J108506992
29 Spring Case
For Type 627 or 627R
Aluminum 40B3086X012
Ductile iron 30B3055X012
Steel 30B3102X012
For Type 627M or 627MR
Ductile iron 30B3055X012
Steel 30B3102X012
For Type 627H or 627HM
Steel 30B3102X012
30 Screened Vent Assembly, plastic 10B3093X012
31 Lower Spring Seat, plated steel
For Type 627 or 627M 1D666625072
For Type 627R or 627MR 20B3073X012
32 Control Spring, pl steel
5 to 20 psig (0.34 to 1.4 bar), yellow 10B3076X012
15 to 40 psig (1.0 to 2.8 bar), green 10B3077X012
35 to 80 psig (2.4 to 5.5 bar), blue 10B3078X012
70 to 150 psig (4.8 to 10.3 bar), red 10B3079X012
140 to 250 psig range (9.6 to 17.2 bar),
blue, used in a Type 627H or 627HM 10B3078X012
240 to 500 psig range (16.5 to 34.5 bar),
red, used in a Type 627H or 627HM 10B3079X012
33 Upper Spring Seat, plated steel 1D667125072
34 Locknut, plated steel 1D667728982
35 Adjusting Screw, pl steel
For Type 627 or 627M 10B3081X012
For Type 627H or 627HM 10B3081X012
For Type 627R or 627MR 10B3080X012
36 Adjusting Screw Cap, plastic 20B3082X012
37 Spr ing Case Cap Screw, pl steel (8 required)
For aluminum or ductile iron diaphragm case 1A391724052
For steel diaphragm case 10B8737X012
For Type 627H/HM, steel diaphragm case 1A346424052
39 Nameplate - - - - - - - - - - 43 Blocked Throat (for Type 627M, 627HM or
627MR only), stainless steel 10B3085X012
44 Blocked Throat O-Ring (for Type 627M,
627HM, or 627MR only), nitrile (2 required) 1E264306992
45 Blocked Throat Backup Ring (for Type 627M,
627HM, or 627MR only), TFE (2 required) 10B3106X012
46 Diaphragm Head Cap Screw, steel
For Type 627 or 627M 1K920724052
For Type 627H or 627HM 1C379124052
47 Relief Seal Retainer (for Type 627R or
627MR only), stainless steel 10B7445X012
48* Guide Retainer O-Ring (for Type 627R
or 627MR only), nitrile 1D682506992
49 Relief Indicator (for Type 627R or
627MR only), rubber (not shown) 30B3100X012
50 Diaphragm Limiter 22B0176X012
51* Diaphragm Limiter O-Ring 1K877606992
52* Pusher Post O-Ring (2 required) 1C853806992
13
Page 14
627 Series
30B3092-D
14
Figure 7. Type 627 Regulator Components
Page 15
627 Series
30B3089-D
Figure 8. Type 627R Regulator Components
15
Page 16
627 Series
30B6433-C
16
1/4-INCH NPT
CONNECTION
Figure 9. Type 627M Regulator Components
Page 17
627 Series
1/4-INCH NPT
30B6434-D
CONNECTION
Figure 10. Type 627MR Regulator Components
17
Page 18
627 Series
31B5374-B
18
Figure 11. Type 627H Regulator Components
Page 19
627 Series
31B9872-B
Figure 12. Type 627HM Regulator Components
19
Page 20
627 Series
January 2001
Errata Sheet
for
627 Series
Form 5252, July 1989
This errata sheet includes information covering the Type 627LB extended body regulator. This new body style
is available on all 627 Series configurations and will be an addition to key 1 in the Parts List. The pressure
ratings on the Type 627LB bodies will be identical to the existing specifications stated in the current 627
Series Instruction Manual. Each bullet on this errata sheet refers to a section of the 627 Series Instruction
Manual (form 5252) where this infornation needs to be added.
• Add the following to the A vailable Constructions
section of Table 1. Specifications on page 2.
Type 627LB: A 627 Series construction with an
extended NPT screwed body. Note: The pressure
ratings and capacities for a Type 627LB depend on the
627 Series construction. See the above listed constructions for ratings and specifications.
• Add the following to the Parts List on page 12.
Key Description Part Number
1 Body
Type 627LB - Ductile iron
1000 psig (69 bar) max inlet pressure
3/4-inch NPT screwed body 39B2450X012
1-inch NPT screwed body 39B2451X012
2-inch NPT screwed body 39B0414X012
Type 627LB - Steel
2000 psig (138 bar) max inlet pressure
3/4-inch NPT screwed body 39B0411X012
1-inch NPT screwed body 39B0412X012
2-inch NPT screwed body 39B0415X012
• Add the following figure to the end of page 18.
E0650
Figure 13. Type 627LB Regulator Body
©Fisher Controls International, Inc., 1986, 1989; All Rights Reserved
Fisher and Fisher Regulators are marks owned by Fisher Controls International, Inc. The Emerson logo is a trade mark 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.
For information, contact Fisher Controls:
Marshalltown, Iowa 50158 USA
28320 Gallardon, France
Sao Paulo 05424 Brazil
Singapore 128461
Printed in U.S.A.
www.FISHERregulators.com
Regulators
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