Emerson 627 Instruction Manual
Instruction Manual
Form 5252
May 2013
627 Series
627 Series Pressure Reducing Regulators
WARNING
!
Failure to follow these instructions or
to properly install and maintain this
equipment could result in an explosion
and/or re causing property damage and
personal injury or death.
Fisher® regulators must be installed,
operated, and maintained in accordance
with federal, state, and local codes, rules
and regulations, and Emerson Process
Management Regulator Technologies, Inc.
(Regulator Technologies) instructions.
If the regulator vents gas or a leak
develops in the system, service to the unit
may be required. Failure to correct trouble
could result in a hazardous condition.
Call a gas service person to service the
unit. Only a qualied person must install
or service the regulator.
Introduction
Scope of the Manual
This manual provides instructions for the installation,
adjustment, maintenance, and parts ordering information
for the 627 Series regulators. These regulators are
usually shipped separate for line installation, although
sometimes they are shipped installed on other
equipment. Refer to the Instruction Manual of the other
equipment for installation and operating instructions.
Description
The 627 Series direct-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. Performance
characteristics vary according to construction.
W4793
Figure 1. Typical 627 Direct-Operated
Pressure Reducing Regulator
WARNING
!
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 is installed
where service conditions could exceed
the limits given in the Specications
section, Tables 1, 2, 3, and 4, 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
service conditions from exceeding
www.fisherregulators.com
D101328X012
627 Series
Specications
The Specications section gives some general specications for the 627 Series regulators. The nameplates give
detailed information for a particular regulator as it comes from the factory.
Available Constructions
Type 627: Direct-operated 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 627LR: Type 627R with light rate relief spring
(Figure 9).
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 NPT downstream control line
connection (Figure 10).
Type 627MR: Type 627M with internal relief
Maximum Body Outlet Pressure
(Types 627M, 627MR, and 627HM Only)
NPT Steel: 2000 psig / 138 bar
Flanged Steel: 1500 psig / 103 bar
Ductile Iron: 1000 psig / 69.0 bar
Orice Sizes
See Table 1
Internal Relief Performance
Type 627R: See Table 3
Type 627LR: See Table 4
Type 627MR: Limited by eld-installed control
line piping
Elastomer Temperature Capabilities
(Figure 11).
Type 627H: Type 627 with a diaphragm limiter to
deliver a higher outlet pressure (Figure 12).
Type 627HM: Type 627H with a stem seal
between the body outlet pressure and diaphragm
case. Pressure is measured under the diaphragm
through the 1/4 NPT downstream control line
connection (Figure 13).
MATERIAL
Nitrile (NBR)
Fluorocarbon (FKM)
Nylon (PA) Disk -40 to 180 -40 to 82
Neoprene (CR) for
Types 627H and 627HM only
Body Sizes and End Connection Styles
BODY SIZE
NPS DN
3/4 - - - - NPT
1 25
2 50
END CONNECTION STYLE
NPT, CL150 RF, CL300 RF,
CL600 RF, and Long Body
NPT, CL150 RF, CL300 RF,
CL600 RF, and Long Body
Maximum Inlet Pressure
(1)
(Body Rating)
CONSTRUCTION
AVAILABLE
All
NPT Stainless Steel: 2000 psig / 138 bar
Flanged Stainless Steel: 1440 psig / 99.3 bar
NPT Steel: 2000 psig / 138 bar
Flanged Steel: 1500 psig / 103 bar
Ductile Iron: 1000 psig / 69.0 bar
Maximum Valve Disk Inlet Pressure Rating
(1)
Nylon (PA) Disk: 2000 psig / 138 bar
Nitrile (NBR) Disk: 1000 psig / 69.0 bar
Fluorocarbon (FKM) Disk: 300 psig / 20.7 bar
Maximum Operating Inlet Pressure, Pressure
Differential, and Outlet Pressure Ranges
(1)
See Table 1 for pressures by orice size and
spring range
Maximum Spring and Diaphragm Casing Pressure
Flow Coefcients
See Table 5
IEC Sizing Coefcients
See Table 6
Pressure Registration
Type 627, 627H, 627R, or 627LR: Internal
Type 627M, 627HM, or 627MR: External through
1/4 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 Types 627R, 627LR, and 627MR
(see Figures 8, 9, and 11)
Spring Case Vent Connection
3/4 NPT with removable screened vent assembly
Approximate Weights
Ductile Iron, Steel, or Stainless Steel Casings:
10 pounds / 4 kg
(1)
Aluminum Casings: 6.3 pounds / 3 kg
See Table 2
1. The pressure/temperature limits in this Instruction Manual or any applicable standard limitation should not be exceeded.
2. Types 627, 627H, 627R, and 627LR are limited by maximum diaphragm casing pressure.
3. Stainless steel body is rated to -40°F / -40°C. Steel and Ductile Iron bodies are rated to -20°F / -29°C.
(1)(2)
(1)(3)
DISK/
DIAPHRAGM
Disk
Diaphragm
Disk
Diaphragm
Diaphragm -40 to 180 -40 to 82
TEMPERATURE
°F °C
-40 to 180 -40 to 82
0 to 180 -18 to 82
2
627 Series
INLET PRESSURE
OUTLET PRESSURE
ATMOSPHERIC PRESSURE
ADJUSTING SCREW
A6557
INLET PRESSURE
OUTLET PRESSURE
ATMOSPHERIC PRESSURE
DIAPHRAGM
PUSHER POST
LEVER
CONTROL SPRING
STEM
VALVE DISK
ORIFICE
Figure 2. Type 627 Operational Schematic
those limits. The Type 627R, 627LR,
or 627MR regulator with internal relief
will provide downstream overpressure
protection within the limits given in
the Specications section, 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.
Principle of Operation
Refer to Figure 2. When downstream demand
decreases, the pressure under the diaphragm
increases. This pressure overcomes the regulator
setting (which is set by a spring). Through the action
of the pusher post assembly, lever, and valve stem
the valve disk moves closer to the orice and reduces
gas ow. If demand downstream increases, pressure
under the diaphragm decreases. Spring force pushes
the pusher post assembly downward and the valve
disk moves away from the orice.
Product Description
Types 627 and 627H Direct-Operated Pressure
Reducing Regulators—The Types 627 and 627H
regulators provide economical pressure reducing
control for a variety of residential, commercial, and
industrial applications. The regulator pitot tube located
in a high velocity stream provides dynamic boost that
compensates for outlet pressure drop.
Type 627 Long Body—The Type 627 Long Body
regulator can be used as a drop-in replacement for
existing Type 630 installations without the need to
modify piping.
Internal Relief for Type 627R, 627LR, or
627MR Regulator—The Type 627R internal relief
performance values were obtained by removing the
disk assembly from the regulator. For the Type 627R,
627LR, or 627MR regulator, the internal relief across
the diaphragm provides overpressure protection in
many applications. As outlet pressures build up above
the start-to-discharge point, the diaphragm moves off
the relief valve seat allowing the excess pressure to
bleed out through the screened vent.
For extra protection, should failure conditions exist
which would prevent normal operation of the regulator
3
627 Series
Table 1. Maximum Inlet Pressures and Outlet Pressure Ranges
OUTLET PRESSURE
TYPE
RANGE, SPRING PART
NUMBER, AND
COLOR CODE
(2)
5
to 20 psig /
0.34 to 1.4 bar
10B3076X012
Yellow
15 to 40 psig /
1.0 to 2.8 bar
10B3077X012
627
and
627M
(3)
Green
35 to 80 psig /
2.4 to 5.5 bar
10B3078X012
Blue
70 to 150 psig /
4.8 to 10.3 bar
10B3079X012
Red
(2)
5
to 20 psig /
0.34 to 1.4 bar
10B3076X012
Yellow
15 to 40 psig /
1.0 to 2.8 bar
10B3077X012
627R
Green
and
627MR
35 to 80 psig /
2.4 to 5.5 bar
10B3078X012
Blue
70 to 150 psig /
4.8 to 10.3 bar
10B3079X012
Red
15 to 40 psig /
1.0 to 2.8 bar
627LR
10B3077X012
Green
140 to 250 psig /
9.7 to 17.2 bar
10B3078X012
627H
and
627HM
(3)
Blue
240 to 500 psig /
16.5 to 34.5 bar
10B3079X012
Red
1. For inlet pressure in excess of 1000 psig / 69.0 bar, refer to the maximum body and disk pressure ratings in the Specications section.
2. For pressure settings under 10 psig / 0.69 bar, inlet pressure should be limited to approximately 100 psig / 6.9 bar so the setpoint adjustment can be obtained.
3. The unbalance forces change from the wide-open monitor mode to an active regulator mode such that the Type 627M or 627HM should have a 3/8 inch / 9.5 mm or larger orice.
- Shaded areas indicate that Fluorocarbon (FKM) and Nylon (PA) disk material are not available.
ORIFICE SIZE
Nylon (PA) Disk Nitrile (NBR) Disk Fluorocarbon (FKM) Disk
Inches mm psig bar psig bar psig bar
3/32
1/8
3/16
1/4
3/8
1/2
3/32
1/8
3/16
1/4
3/8
1/2
3/32
1/8
3/16
1/4
3/8
1/2
3/32
1/8
3/16
1/4
3/8
1/2
3/32
1/8
3/16
1/4
3/8
1/2
3/32
1/8
3/16
1/4
3/8
1/2
3/32
1/8
3/16
1/4
3/8
1/2
3/32
1/8
3/16
1/4
3/8
1/2
3/32
1/8
3/16
1/4
3/32
1/8
3/16
1/4
3/8
1/2
3/32
1/8
3/16
1/4
3/8
1/2
2.4
3.2
4.8
6.4
9.5
13
2.4
3.2
4.8
6.4
9.5
13
2.4
3.2
4.8
6.4
9.5
13
2.4
3.2
4.8
6.4
9.5
13
2.4
3.2
4.8
6.4
9.5
13
2.4
3.2
4.8
6.4
9.5
13
2.4
3.2
4.8
6.4
9.5
13
2.4
3.2
4.8
6.4
9.5
13
2.4
3.2
4.8
6.4
2.4
3.2
4.8
6.4
9.5
13
2.4
3.2
4.8
6.4
9.5
13
2000
1000
750
500
300
250
2000
1500
1000
750
500
300
2000
2000
1750
1500
1000
750
2000
2000
2000
1750
1250
750
2000
1000
750
500
300
200
2000
1500
1000
750
300
200
2000
1750
1000
750
300
200
2000
1000
500
300
200
200
2000
2000
1750
1500
1000
750
2000
2000
1750
1500
1000
750
MAXIMUM INLET PRESSURE
138
69.0
51.7
34.5
20.7
17.2
138
103
69.0
51.7
34.5
20.7
138
138
121
103
69.0
51.7
138
138
138
121
86.2
51.7
138
69.0
51.7
34.5
20.7
13.8
138
103
69.0
51.7
20.7
13.8
138
121
69.0
51.7
20.7
13.8
138
69.0
34.5
20.7
13.8
13.8
1000
1000
750
500
300
250
1000
1000
1000
750
500
300
1000
1000
1000
1000
1000
750
1000
1000
1000
1000
1000
750
1000
1000
750
500
300
200
1000
1000
1000
750
300
200
1000
1000
1000
750
300
200
1000
1000
500
300
200
200
1000
1000
750
500
138
138
121
103
69.0
51.7
138
138
121
103
69.0
51.7
1000
1000
1000
1000
750
500
1000
1000
1000
1000
1000
750
69.0
69.0
51.7
34.5
20.7
17.2
69.0
69.0
69.0
51.7
34.5
20.7
69.0
69.0
69.0
69.0
69.0
51.7
69.0
69.0
69.0
69.0
69.0
51.7
69.0
69.0
51.7
34.5
20.7
13.8
69.0
69.0
69.0
51.7
20.7
13.8
69.0
69.0
69.0
51.7
20.7
13.8
69.0
69.0
34.5
20.7
13.8
13.8
69.0
69.0
51.7
34.5
69.0
69.0
69.0
69.0
51.7
34.5
69.0
69.0
69.0
69.0
69.0
51.7
(1)
300
300
300
300
300
250
300
300
300
300
300
300
300
300
300
300
300
300
300
300
300
300
300
300
300
300
300
300
300
200
300
300
300
300
300
200
300
300
300
300
300
200
300
300
300
300
200
200
300
300
300
300
20.7
20.7
20.7
20.7
20.7
17.2
20.7
20.7
20.7
20.7
20.7
20.7
20.7
20.7
20.7
20.7
20.7
20.7
20.7
20.7
20.7
20.7
20.7
20.7
20.7
20.7
20.7
20.7
20.7
13.8
20.7
20.7
20.7
20.7
20.7
13.8
20.7
20.7
20.7
20.7
20.7
13.8
20.7
20.7
20.7
20.7
13.8
13.8
20.7
20.7
20.7
20.7
4
627 Series
Table 2. Maximum Spring and Diaphragm Casing Pressure
MAXIMUM PRESSURE DESCRIPTION
Maximum pressure to spring and diaphragm
casings to prevent leak to atmosphere other than
relief action (internal parts damage may occur)
Maximum pressure to spring and diaphragm
casings to prevent burst of casings during
abnormal operation (leak to atmosphere and
internal parts damage may occur)
Maximum diaphragm casing overpressure (above
setpoint) to prevent damage to internal parts
1. If the spring case is pressurized, a metal adjusting screw cap is required. Contact your local Sales Ofce for details.
DIAPHRAGM
CASING MATERIAL
Die cast aluminum
Ductile iron
Steel or Stainless steel 250 17.2 800 55.2
Die cast aluminum 375 25.9 375 25.9 Not Available Not Available
Ductile iron 465 32.1 465 32.1 465 32.1 465 32.1
Steel or Stainless steel 1500 103 1500 103 1500 103 1500 103 1500 103
All materials 60 4.1 120 8.3 60 4.1 120 8.3 120 8.3
(for example, disk broken off or disk erosion), the
pusher post contacts the lever retainer causing the
relief valve assembly to open. Since the diaphragm
TYPE 627
psig bar psig bar psig bar psig bar psig bar
250 17.2 250 17.2
Perform steps 1 through 6 for all types of regulators:
1. Only personnel qualied through training and
continues to rise as downstream pressure builds, it
opens the relief valve; thereby, opening the valve.
This internal relief may be adequate for the application.
2. For a regulator that is shipped separately, make
Downstream Control Line for Type 627M, 627HM,
or 627MR Regulator—A Type 627M, 627HM, or
627MR regulator has a blocking throat stem seal
3. Ensure that all tubing and piping have been blown
with O-rings and a 1/4 NPT control line connection in
TYPES 627R
AND 627LR
experience should install, operate, or maintain
this regulator.
sure that there is no damage to or foreign material
in the regulator.
free of foreign debris.
the diaphragm case. A regulator with a downstream
control line is used for monitoring applications or
other applications where other equipment is installed
between the regulator and the pressure control point.
The stem seal separates the body outlet pressure
from the diaphragm case.
4. The regulator may be installed in any position as
long as the ow 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.
(1)
TYPE 627M TYPE 627MR
Not Available
250 17.2
Not Available Not Available
TYPES 627H
AND 627HM
Not Available
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 numbers referenced
in this section are shown in Figures 7 through 13.
Ensure that the operating temperature capabilities
listed in Specications section are not exceeded.
Note
If the regulator is shipped mounted on
another unit, install that unit according
to the appropriate Instruction Manual.
WARNING
!
A regulator may vent some gas to the
atmosphere. In hazardous or ammable
gas service, vented gas may accumulate
and cause personal injury, death, or
property damage due to re 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.
6. Position the body (key 1) and/or diaphragm spring
case (key 29) so it will not collect moisture or
debris into the screened vent. If the regulator
requires repositioning, refer to the Body Area
Maintenance Procedures and/or the Diaphragm
and Spring Case Area Maintenance Procedures
in the Maintenance section to reposition the
screened vent for the application.
5
627 Series
EQUALIZING LINE
VENT VALVE
GRAVITY FEED
ALCOHOL DRIP POT
TYPE 627M SET LOWER
THAN WORKING REGULATOR
CONTROL LINE
NEEDLE
VALV E
INLET
A3725
Figure 3. De-Icer System Operational Schematic
Perform steps 7 through 9 for Types 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 / 9.5 mm 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 instability or cycling of the regulator.
Remote Vent Line Installation
All 627 Series regulators have a vent assembly
installed in the 3/4 NPT spring case vent opening.
The vent assembly can be removed to install a
remote vent line if necessary. Remote vent lines
must have the largest practical diameter. It should be
as short as possible with minimum number of bends
or elbows.
HAND
VALV E
WORKING REGULATOR
the vent or vent line and prevent proper operation of
the regulator. Periodically check the vent opening to
be sure it is not plugged with foreign debris.
Type 627M or 627HM Regulator
De-Icer System Application
For the Type 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 form within this regulator. The
formation of ice decreases the size of the orice, so
the regulator is unable to supply enough ow to satisfy
the downstream demand. When the downstream
pressure falls below the outlet pressure setting of the
Type 627M or 627HM regulator, the disk assembly
of the Type 627M or 627HM regulator moves off its
orice, permitting alcohol to ow into the main gas
line. The alcohol carried to the main regulator by the
owstream prevents additional ice from forming on the
orice. When normal ow resumes, and as pressure
in the downstream system is restored, the Type 627M
or 627HM regulator shuts off.
Overpressure Protection
Protect the remote vent opening against entrance of
rain, snow, or any other foreign material that may plug
6
627 Series regulators have outlet pressure ratings that
are lower than their inlet pressure ratings. A pressure-
627 Series
22.1
42.7
57.2
75.8
89.6
110
17.9
42.1
55.8
75.8
89.6
110
14.5
41.4
55.2
75.8
89.6
110
14.5
40.7
55.2
75.8
89.6
66.2
10.3
37.9
52.4
75.8
89.6
66.2
31.1
46.2
69.0
82.7
110
22.8
38.6
69.0
82.7
110
(1)
190
13.1
26.9
33.1
46.2
53.1
66.2
11.7
25.5
33.1
46.2
53.1
66.2
9.0
24.8
33.1
46.2
53.1
66.2
9.0
24.1
32.4
44.1
53.8
66.2
6.9
22.8
31.1
43.4
53.1
66.2
17.9
27.6
42.1
52.4
66.9
13.8
23.4
37.9
50.3
66.9
95
180
220
320
360
450
90
170
220
320
360
450
80
170
220
320
360
450
80
170
220
320
370
450
70
160
210
320
360
460
140
190
300
360
460
120
180
290
350
460
390
480
670
770
960
170
370
480
670
770
960
130
360
480
670
770
960
130
350
470
640
780
960
100
330
450
630
770
960
260
400
610
760
970
200
340
550
730
970
Table 3. Type 627R Internal Relief Performance
OUTLET
PRESSURE RANGE,
SPRING PART
NUMBER, AND
COLOR CODE
(3)
to 20 psig /
5
0.34 to 1.4 bar
10B3076X012
Yellow
15 to 40 psig /
1.0 to 2.8 bar
10B3077X012
Green
1. The internal relief performance values are obtained by removing the disk assembly.
2. For inlet pressures in excess of 1000 psig / 69.0 bar, refer to the maximum body and disk pressure ratings in the Specications section.
3. For pressure settings under 10 psig / 0.69 bar, inlet pressure should be limited to approximately 100 psig / 6.9 bar so the setpoint adjustment can be obtained.
- Shaded areas indicate maximum inlet pressures allowed during system malfunction only. Table 1 gives the maximum inlet pressure for normal regulator operation.
OUTLET
PRESSURE
SETTING
psig bar psig bar psig bar psig bar psig bar psig bar psig bar psig bar
10 0.69
15 1.0
20 1.4
15 1.0
1.4
20
30 2.1
40 2.8
MAXIMUM
ALLOWABLE
DOWNSTREAM
SYSTEM
PRESSURE
60
100
125
175
200
250
60
100
125
175
200
250
60
100
125
175
200
250
60
100
125
175
200
250
60
100
125
175
200
250
100
125
175
200
250
100
125
175
200
250
4.1
6.9
8.6
12.1
13.8
17.2
4.1
6.9
8.6
12.1
13.8
17.2
4.1
6.9
8.6
12.1
13.8
17.2
4.1
6.9
8.6
12.1
13.8
17.2
4.1
6.9
8.6
12.1
13.8
17.2
6.9
8.6
12.1
13.8
17.2
6.9
8.6
12.1
13.8
17.2
MAXIMUM INLET PRESSURE TO KEEP MAXIMUM ALLOWABLE DOWNSTREAM
3/32 / 2.4 1/8 / 3.2 3/16 / 4.8 1/4 / 6.4 3/8 / 9.5 1/2 / 13
1250
86.2
2000
138
2000
138
2000
138
2000
138
2000
138
1000
69.0
2000
138
2000
138
2000
138
2000
138
2000
138
850
58.6
2000
138
2000
138
2000
138
2000
138
2000
138
1000
69.0
2000
138
2000
138
2000
138
2000
138
2000
138
630
43.4
2000
138
2000
138
2000
138
2000
138
2000
138
2000
138
2000
138
2000
138
2000
138
2000
138
1500
103
2000
138
2000
138
2000
138
2000
138
SYSTEM PRESSURE FROM BEING EXCEEDED
Orice Size, Inches / mm
740
51.0
103
131
138
138
138
42.7
96.5
131
138
138
138
33.8
89.6
124
138
138
138
26.2
89.6
124
138
138
138
13.8
82.7
117
138
138
138
65.5
103
138
138
138
48.3
89.6
124
138
138
320
620
830
1100
1300
1600
260
610
810
1100
1300
1600
210
600
800
1100
1300
1600
210
590
800
1100
1300
1600
150
550
760
1100
1300
1600
450
670
1000
1200
1600
330
560
1000
1200
1600
1500
1900
2000
2000
2000
620
1400
1900
2000
2000
2000
490
1300
1800
2000
2000
2000
380
1300
1800
2000
2000
2000
200
1200
1700
2000
2000
2000
950
1500
2000
2000
2000
700
1300
1800
2000
2000
(2)
6.6
75
130
160
220
260
320
70
130
160
220
260
320
65
120
160
220
260
320
65
120
160
220
260
320
65
120
160
220
260
320
110
150
220
260
320
108
140
220
250
320
5.2
9.0
11.0
15.2
17.9
22.1
4.8
9.0
11.0
15.2
17.9
22.1
4.5
8.3
11.0
15.2
17.9
22.1
4.5
8.3
11.0
15.2
17.9
22.1
4.5
8.3
11.0
15.2
17.9
22.1
7.6
10.3
15.2
17.9
22.1
7.4
9.7
15.2
17.2
22.1
12.4
15.2
22.1
24.8
31.0
6.2
11.7
15.2
22.1
24.8
31.0
5.5
11.7
15.2
22.1
24.8
31.0
5.5
11.7
15.2
22.1
25.5
31.0
4.8
11.0
14.5
22.1
24.8
31.7
9.7
13.1
20.7
24.8
31.7
8.3
12.4
20.0
24.1
31.7
- continued -
relieving or pressure-limiting device must be provided
by the user for the Types 627, 627H, 627M, and
627HM regulators if the inlet pressure can exceed the
outlet pressure rating, since these regulators do not
have internal relief.
Types 627R and 627LR regulators provide internal
relief which limits the total outlet pressure buildup over
setpoint. Use Tables 3 and 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.
Startup and Adjustment
Startup
WARNING
!
To avoid personal injury or property
damage due to explosion or damage to
regulator or downstream components
during startup, release downstream
7
627 Series
Table 3. Type 627R Internal Relief Performance
OUTLET PRESSURE RANGE,
SPRING PART NUMBER,
AND COLOR CODE
35 to 80 psig /
2.4 to 5.5 bar
10B3078X012
Blue
70 to 150 psig /
4.8 to 10.3 bar
10B3079X012
Red
1. The internal relief performance values are obtained by removing the disk assembly.
2. For inlet pressures in excess of 1000 psig / 69.0 bar, refer to the maximum body and disk pressure ratings in the Specications section.
3. For pressure settings under 10 psig / 0.69 bar, inlet pressure should be limited to approximately 100 psig / 6.9 bar so the setpoint adjustment can be obtained.
- Shaded areas indicate maximum inlet pressures allowed during system malfunction only. Table 1 gives the maximum inlet pressure for normal regulator operation.
OUTLET
PRESSURE
SETTING
psig bar psig bar psig bar psig bar psig bar psig bar psig bar psig bar
40 2.8
50 3.4
60 4.1
70 4.8
80 5.5
70 4.8
80 5.5
100 6.9
125 8.6 250 17.2 2000 138 1000 69.0 500 34.5 390 26.9 290 20.0 260 17.9
150 10.3 250 17.2 1200 82.7 260 17.9 260 17.9 260 17.9 260 17.9 260 17.9
MAXIMUM
ALLOWABLE
DOWNSTREAM
SYSTEM
PRESSURE
125
150
175
200
250
125
150
175
200
250
125
150
175
200
250
150
175
200
250
150
175
200
250
175
200
250
175
200
250
200
250
MAXIMUM INLET PRESSURE TO KEEP MAXIMUM ALLOWABLE DOWNSTREAM
3/32 / 2.4 1/8 / 3.2 3/16 / 4.8 1/4 / 6.4 3/8 / 9.5 1/2 / 13
8.6
2000
10.3
2000
12.1
2000
13.8
2000
17.2
2000
8.6
1400
10.3
2000
12.1
2000
13.8
2000
17.2
2000
8.6
10.3
12.1
13.8
17.2
10.3
12.1
13.8
17.2
10.3
12.1
13.8
17.2
12.1
13.8
17.2
12.1
13.8
17.2
13.8
17.2
900
1700
2000
2000
2000
1200
2000
2000
2000
800
1500
2000
2000
1900
2000
2000
1400
2000
2000
1500
2000
SYSTEM PRESSURE FROM BEING EXCEEDED
138
1100
138
1600
138
2000
138
2000
138
2000
96.5
820
138
1400
138
1900
138
2000
138
2000
62.1
450
117
1100
138
1700
138
2000
138
2000
82.7
850
138
1400
138
2000
138
2000
55.2
500
103
1200
138
1700
138
2000
131
600
138
1200
138
2000
96.5
250
138
960
138
2000
103
250
138
1600
(1)
(continued)
Orice Size, Inches / mm
75.8
500
750
980
1200
1600
400
650
700
1100
1500
270
540
780
1000
1400
430
670
920
1300
300
550
800
1200
400
630
1100
240
520
1000
240
770
34.5
51.7
67.6
82.7
110
27.6
44.8
48.3
75.8
103
18.6
37.2
53.8
69.0
96.5
29.6
46.2
63.4
89.6
20.7
37.9
55.2
82.7
27.6
43.4
75.8
16.5
35.9
69.0
16.5
53.1
110
138
138
138
56.5
96.5
131
138
138
31.0
75.8
117
138
138
58.6
96.5
138
138
34.5
82.7
117
138
41.4
82.7
138
17.2
66.2
138
17.2
110
300
440
580
720
940
230
370
530
670
920
190
300
470
610
880
250
400
550
830
200
330
480
770
260
380
680
200
330
620
230
520
20.7
30.3
40.0
49.6
64.8
15.9
25.5
36.5
46.2
63.4
13.1
20.7
32.4
42.1
60.7
17.2
27.6
37.9
57.2
13.8
22.8
33.1
53.1
17.9
26.2
46.9
13.8
22.8
42.7
15.9
35.9
140
170
230
290
340
450
150
210
270
330
430
190
250
310
420
170
230
280
400
160
210
270
390
200
250
360
190
240
350
210
320
(2)(3)
11.7
15.9
20.0
23.4
31.0
10.3
14.5
18.6
22.8
29.6
9.7
13.1
17.2
21.4
29.0
11.7
15.9
19.3
27.6
11.0
14.5
18.6
26.9
13.8
17.2
24.8
13.1
16.5
24.1
14.5
22.1
140
180
220
250
320
140
170
210
240
320
130
160
200
230
310
160
190
230
310
150
190
220
300
175
210
290
175
210
280
210
270
9.7
12.4
15.2
17.2
22.1
9.7
11.7
14.5
16.5
22.1
9.0
11.0
13.8
15.9
21.4
11.0
13.1
15.9
21.4
10.3
13.1
15.2
20.7
12.1
14.5
20.0
12.1
14.5
19.3
14.5
18.6
Table 4. Type 627LR Internal Relief Performance
OUTLET PRESSURE RANGE,
SPRING PART NUMBER,
AND COLOR CODE
15 to 40 psig /
1.03 to 2.8 bar
10B3077X012
Green
1. The internal relief performance values are obtained by removing the disk assembly.
2. For inlet pressures in excess of 1000 psig / 69.0 bar, refer to the maximum body and disk pressure ratings in the Specications section.
OUTLET
PRESSURE
SETTING
psig bar psig bar psig bar psig bar psig bar psig bar
30 2.1
40 2.8
MAXIMUM ALLOWABLE
DOWNSTREAM
SYSTEM PRESSURE
55 3.8 500 34.5 270 18.6 110 7.6 80 5.5
60 4.1 850 58.6 480 33.1 200 13.8 120 8.3
66 4.5 1000 69.0 660 45.5 290 20.0 175 12.1
66 4.5 380 26.2 190 13.1 85 5.9 80 5.5
70 4.8 700 48.3 370 25.5 150 10.3 115 7.9
75 5.2 1000 69.0 560 38.6 240 16.5 160 11.0
MAXIMUM INLET PRESSURE TO KEEP MAXIMUM ALLOWABLE
DOWNSTREAM SYSTEM PRESSURE FROM BEING EXCEEDED
3/32 / 2.4 1/8 / 3.2 3/16 / 4.8 1/4 / 6.4
(1)
Orice Size, Inches / mm
8
(2)
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