Emerson Fisher LS200 Series User manual

LS200 Series Direct-Operated Regulators
Table of Contents
Introduction..................................................................1
Specifications .............................................................. 2
Principle of Operation.................................................. 7
Installation ...................................................................8
Overpressure Protection.............................................. 8
Startup.........................................................................9
Adjustment ..................................................................9
Shutdown...................................................................10
Maintenance..............................................................10
Parts Ordering ........................................................... 12
Parts List....................................................................13
▲ WARNING
Failure to follow these instructions or
to properly install and maintain this
equipment could result in an explosion,
fire and/or fire 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.
(Emerson) 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 qualified service person to service
the unit. Installation, operation and
maintenance procedures performed
by unqualified person may result
in improper adjustment and unsafe
operation. Either condition may result in
equipment damage or personal injury.
Only a qualified person shall install or
service the regulator.
Introduction
Scope of the Manual
This manual provides specications, installation,
adjustment, maintenance instructions and parts
ordering information for the LS200 Series Regulators.
Only personnel qualied through training or experience
should install, operate and maintain this regulator. If
there are any questions concerning these instructions,
contact your local Emerson Impact Partner O󰀩ce
before proceeding.
Figure 1. LS200 Series Regulator
LS200 Series
January 2023
Instruction Manual
D104616X012

Specifications
The Specifications section lists the specifications for the LS200 Series Direct-Operated Regulators. Factory
specification is stamped on the nameplate fastened on the regulator at the factory.
Actuator Sizes
Types LS220 and LS224 (13.8 in. / 350 mm):
Medium pressure construction for outlet pressure
range of 4.35 to 10 psig / 0.3 to 0.69 bar.
Maximum operating inlet pressure of 125 psi /
8.61 bar. Medium Pressure for outlet range of 10
to 21.75 psig / 0.69 to 1.5 bar has a maximum
operating inlet up to 284 psig / 19.6 bar. The
maximum operating and emergency inlet pressure
rating is 284 psig / 19.6 bar at 100°F / 38°C(1).
Types LS250 and LS254 (10.0 in. / 255 mm):
High pressure construction for outlet
pressure range of 20 to 60 psig / 1.37 to
4.2 bar. The maximum operating inlet pressure
is 284 psig / 19.6 bar with a maximum
emergency inlet pressure of 284 psig / 19.6 bar
at 100°F / 38°C(1).
Body Sizes and End Connection Styles
See Table 3
Outlet Pressure Ranges(2)
See Table 4
Pressure Ratings(2)
See Table 4
Maximum Outlet Pressure(2)
See Table 5
Certifications
EN 334, EN 14382 and
Pressure Equipment Directive (PED)
DVGW
Up to 25% Hydrogen Blend (Pending 100%)
V9
Hydrogen Construction Available(4)
Pressure Registration
External; downstream control line is required
Temperature Capabilities(2)(3)
-20 to 150°F / -29 to 66°C
-4 to 140°F / -20 to 60°C for PED
Lockup and Function Tested to -40°F / -40°C
Control Line Connection
Without Slam-Shut:
1/4 NPT (internal); connection will be positioned
directly over body outlet (standard position)
or 90 degrees right or left of standard position
if specified.
With Slam-Shut:
1/4 NPT (internal) connection right or left directly
over slam-shut. Can be selected or changed
after shipment.
Vent Connection
3/4 NPT (internal) vent assembly.
Approximate Weight
Body
NPT: 26.5 lbs / 12 kg
2x2: 30.4 lbs / 13.5 kg
2x4: 38.7 lbs / 17.55 kg
Slam-Shut Device: 16.4 lbs / 7.45 kg
Type LS220: 61.1 lbs / 27.7 kg
(Eye nuts included)
Type LS250: 44.9 lbs / 20.35 kg
(Eye nuts included)
1. Shown at ambient temperature 100°F / 38°C. Follow applicable ange pressure/temperature code limits.
2. The pressure/temperature limits in this Instruction Manual and any applicable standard or code limitation should not be exceeded.
3. The lock up and function were tested to -40°F / -40°C. Flow performance was tested at ambient temperature.
4. Contact your Emerson Impact Partner or the local Emerson sales o󰀩ce for more information.
PED Categories and Fluid Group
A single LS200 Regulator without Slam-shut cannot
be used as a safety accessory according Pressure
Equipment Directive PED 2014/68/EU to protect
downstream pressure equipment.
According to EN 14382, only in integral strength type
and Class A conguration (when both over and under
pressure protections are set up), the possible built-in
safety shut-o󰀨 device can be classied like a safety
accessory according to Pressure Equipment Directive
PED 2014/68/EU.
The minimum PS between slam shut device valve
and slam-shut controller shall be the PS of the safety
accessory to comply the provisions of EN 14382 about
integral strength type.
Table 1. LS200 Series Regulators PED Category
PRODUCT SIZE CATEGORY FLUID GROUP
2 I 1
All sizes with slam shut IV
2
LS200 Series

Table 3. Body Sizes and End Connection Styles
BODY SIZE END CONNECTION STYLE
In. DN Cast iron Body Ductile iron Body WCC steel Body
2x2 50x50 NPT or CL125 FF CL150 RF or PN 16 NPT, CL150 RF or PN 16
2x4 50x100 CL125 FF CL150 RF or PN16 CL150 RF or PN 16
Table 4. LS200 Series Outlet Pressure Ranges and Control Spring Information
TYPE
ACTUATOR
DIAMETER SIZE,
in. / mm
SPRING RANGE CONTROL SPRING
PART NUMBER WIRE DIAMETER COLOR
psig bar In. mm
LS220 and
LS224 13. 8 / 350
4.35 to 5.1 0.3 to 0.35 ERAA07586A0 8.5 0.312 Light Green
4.35 to 10.6 0.3 to 0.73 ERAA07589A0 10.5 0.406 Pink
4.8 to 15.7 0.33 to 1.08 ERAA07283A0 12 0.438 Dark Blue
8.3 to 21.75 0.57 to 1.5 ERAA07283A0 12.5 0.5 Orange
LS250 and
LS254 10.0 / 255
20 to 30.3 1.38 to 2.09 ERAA07589A0 10.5 0.406 Pink
20 to 44.8 1.38 to 3.09 ERAA07592A0 12 0.438 Dark Blue
25 to 60 1.72 to 4.14 ERAA07283A0 12.5 0.5 Orange
PRESSURE TYPE LS220 TYPE LS250
psig bar psig bar
Maximum Operating Inlet Pressure <10 psi / 0.69 bar max. outlet pressure 125 8.61 - - - - - - - -
>10 psi / 0.69 bar max. outlet pressure 284 19.6 284 19.6
Maximum Emergency Inlet Pressure 284 19.6 284 19.6
Maximum Operating Outlet Pressure(1) 21.7 1.5 60 4.13
Maximum Outlet Pressure Over Outlet Pressure Setting 28.9 1.99 83.7 5.77
Maximum Emergency Outlet (Casing) Pressure 50 3.44 150 10.34
1. With highest spring range available only.
Table 5. Maximum Inlet and Outlet Pressure
Table 2. Available Configurations
TYPE NUMBER OPTION
L S 2
PRESSURE CONSTRUCTION
0 Low Pressure Applications (In Development)
2Medium Pressure Applications (Outlet Pressure: 0.3 to 1.5 bar / 4.35 to 21.75 psig)
5High Pressure Applications (Outlet Pressure: 1.38 to 4.14 bar / 20 to 60 psig)
OVERPRESSURE PROTECTION
0 Without Overpressure Protection Module
4 With Slam-shut Module(1)
1. Reference Instruction Manual D103127X012 for Type VSX8 safety slam-shut module.
Table 6. Wide Open Flow Coecients
UNIT INFORMATION FLOW COEFFICIENTS
Regulator Body Type CgC1Cv
LS200 Series
2x2 LS220 and LS250 2083 29 72
2x4 2461 33 74
2x2 LS224 and LS254
with slam shut device
2001 28 28
2x4 2304 34 67
3
LS200 Series

TYPE OUTLET RANGE BODY
MATERIAL
END
CONNECTION
TEMPERATURE RANGE MAXIMUM
OPERATING INLET
MAXIMUM BODY
PRESSURE RATING
psig bar ˚F ˚C psig bar psig bar
LS220 and
LS224 4.35 to 10 0.3 to 0.69
Ductile iron
PN 16 -20 to 100 -29 to 38
125 8.6
232 16
-20 to 150 -29 to 66
CL150 RF -20 to 100 -29 to 38 249 17.2
-20 to 150 -29 to 66 242 16.7
Steel
PN 16 -20 to 100 -29 to 38 232 16
-20 to 150 -29 to 66
CL150 RF -20 to 100 -29 to 38 284 19.6
-20 to 150 -29 to 66 271 18.7
NPT -20 to 100 -29 to 38 284 19.6
-20 to 150 -29 to 66 271 18.7
Cast iron
CL125 FF -20 to 100 -29 to 38
175 12.1
-20 to 150 -29 to 66
NPT -20 to 100 -29 to 38
-20 to 150 -29 to 66
LS220 and
LS224 10 to 21.7 0.69 to 1.5
Ductile iron
PN 16 -20 to 100 -29 to 38 232 16 232 16
-20 to 150 -29 to 66
CL150 RF -20 to 100 -29 to 38 249 17.2 249 17.2
-20 to 150 -29 to 66 242 16.7 242 16.7
Steel
PN 16 -20 to 100 -29 to 38 232 16 232 16
-20 to 150 -29 to 66
CL150 RF -20 to 100 -29 to 38 284 19.6 284 19.6
-20 to 150 -29 to 66 271 18.7 271 18.7
NPT -20 to 100 -29 to 38 284 19.6 284 19.6
-20 to 150 -29 to 66 271 18.7 271 18.7
Cast iron
CL125 FF -20 to 100 -29 to 38
175 12.1 175 12.1
-20 to 150 -29 to 66
NPT -20 to 100 -29 to 38
-20 to 150 -29 to 66
LS250 and
LS254 20 to 60 1.37 to 4.13
Ductile iron
PN 16 -20 to 100 -29 to 38 232 16 232 16
-20 to 150 -29 to 66
CL150 RF -20 to 100 -29 to 38 249 17.2 249 17.2
-20 to 150 -29 to 66 242 16.7 242 16.7
Steel
PN 16 -20 to 100 -29 to 38 232 16 232 16
-20 to 150 -29 to 66
CL150 RF -20 to 100 -29 to 38 284 19.6 284 19.6
-20 to 150 -29 to 66 271 18.7 271 18.7
NPT -20 to 100 -29 to 38 284 19.6 284 19.6
-20 to 150 -29 to 66 271 18.7 271 18.7
Cast iron
CL125 FF -20 to 100 -29 to 38
175 12.1 175 12.1
-20 to 150 -29 to 66
NPT -20 to 100 -29 to 38
-20 to 150 -29 to 66
Table 7. Pressure Ranges and Body Pressure-Temperature Ratings Without PED Certication
4
LS200 Series

TYPE OUTLET RANGE BODY
MATERIAL
END
CONNECTION
TEMPERATURE RANGE MAXIMUM
OPERATING INLET
MAXIMUM BODY
PRESSURE RATING
psig bar ˚F ˚C psig bar psig bar
LS220 and
LS224 4.35 to 10 0.3 to 0.69
Ductile iron
PN 16 -4 to 100 -20 to 38
125 8.6
232 16
-4 to 140 -20 to 60
CL150 RF -4 to 100 -20 to 38 249 17.2
-4 to 140 -20 to 60 242 16.7
Steel
PN 16 -4 to 100 -20 to 38 232 16
-4 to 140 -20 to 60
CL150 RF -4 to 100 -20 to 38 284 19.6
-4 to 140 -20 to 60 271 18.7
NPT -4 to 100 -20 to 38 284 19.6
-4 to 140 -20 to 60 271 18.7
LS220 and
LS224 10 to 21.7 0.69 to 1.5
Ductile iron
PN 16 -4 to 100 -20 to 38 232 16 232 16
-4 to 140 -20 to 60
CL150 RF -4 to 100 -20 to 38 249 17.2 249 17.2
-4 to 140 -20 to 60 242 16.7 242 16.7
Steel
PN 16 -4 to 100 -20 to 38 232 16 232 16
-4 to 140 -20 to 60
CL150 RF -4 to 100 -20 to 38 284 19.6 284 19.6
-4 to 140 -20 to 60 271 18.7 271 18.7
NPT -4 to 100 -20 to 38 284 19.6 284 19.6
-4 to 140 -20 to 60 271 18.7 271 18.7
LS250 and
LS254 20 to 60 1.37 to 4.13
Ductile iron
PN 16 -4 to 100 -20 to 38 232 16 232 16
-4 to 140 -20 to 60
CL150 RF -4 to 100 -20 to 38 249 17.2 249 17.2
-4 to 140 -20 to 60 242 16.7 242 16.7
Steel
PN 16 -4 to 100 -20 to 38 232 16 232 16
-4 to 140 -20 to 60
CL150 RF -4 to 100 -20 to 38 284 19.6 284 19.6
-4 to 140 -20 to 60 271 18.7 271 18.7
NPT -4 to 100 -20 to 38 284 19.6 284 19.6
-4 to 140 -20 to 60 271 18.7 271 18.7
Table 8. Pressure Ranges and Body Pressure-Temperature Ratings With PED Certication
Downstream equipment, protected by possible built-in
safety shut-o󰀨 device (in its Class A and integral
strength conguration) of this product, shall have
technical features such as to be category per table
below according to Pressure Equipment Directive
PED 2014/68/EU.
The regulator and built-in pressure accessories
(e.g. slam-shut controller Type VSX8) installed in
all the available sizes of LS200 Series Regulators,
conform to Pressure Equipment Directive PED
2014/68/EU Article 4 Section 3 and were designed and
manufactured in accordance with Sound Engineering
Practice (SEP).
Per Article 4 Section 3, these “SEP” products must not
bear the CE marking.
Product Description
The LS200 Series Direct-Operated Gas Regulators,
shown in Figure 1 are primarily designed for
industrial and commercial applications supplying
gas to furnaces, burners and other appliances.
The LS200 Series Balancing System enables the
regulator to provide accurate control gas pressure
for maximum combustion efficiency despite varying
inlet pressure conditions. The single port construction
provides bubble-tight shutoff.
This product has been designed to be used with fuel
gases of 1st and 2nd family according to EN 437 and
with other nonaggressive and nonfuel gases. For any
other gases, other than natural gas, please contact
your local sales agent.
5
LS200 Series

Figure 2. LS200 Series Operational Schematics
Figure 3a. LS200 Series Installation Schematic
TYPE LS220 TYPE LS250
INLET PRESSURE
OUTLET PRESSURE
ATMOSPHERIC PRESSURE
5 x DN
10 x DN
6
LS200 Series
MXXXX
Type LSR
Type LSR Medium Pressure Direct-Operated Regulator
August 2022
INLET PRESSURE
OUTLET PRESSURE
ATMOSPHERIC PRESSURE

5 x DN
10 x DN
Figure 3b. LS200 Series Monitor Conguration Installation Schematic
The standard gas pressure devices (regulators
and safety shut-off devices) are those used in the
assemblies dealt with into EN 12186 and EN 12279
and their use has to be under the provisions into
ENs 12186 and 12279.
If additional pressure accessories (e.g. slam shut
controller) are needed, it is recommended to use
Emerson products.
Emerson will not be responsible for any possible
inefficiency due to installation of non-Emerson
production additional pressure accessories (e.g.
slam-shut controller).
An external downstream control line is required for
the operation of the regulator. A restriction collar is
available to reduce the flow capacity of the regulator.
Principle of Operation
Refer to the operational schematics in Figure 3. The
LS200 Series downstream pressure is registered
under the diaphragm via the external control line and
is used as the operating medium. Increased demand
lowers the downstream pressure and allows the
spring to move the diaphragm and stem assembly
down, opening the valve disk and supplying more gas
to the downstream system.
Decreased demand increases the downstream
pressure and moves the diaphragm and stem
assembly up, closing the valve disk and decreasing
the gas supply to the downstream system.
Boosting System
The LS200 Series incorporates a balancing diaphragm
and a boosting system. When the regulator is locked
up, inlet pressure is registered on the top of the disk
and on the bottom of the balancing diaphragm through
space between the stem and cage. Also, downstream
pressure is registered on the bottom of the disk and on
the top of the balancing diaphragm through a passage
in the stem.
When the trim is open, gas flows from the inlet over
the edge of the disk to the outlet. Under the disk,
there is little gas flow. The gas pressure is higher
than it is in the flow path where gas velocity tends to
lower the pressure. The higher pressure near the disk
is registered on the top of the balancing diaphragm
through the space between the stem and the cage.
This pressure registered on the top of the balancing
diaphragm aids downward disk travel and
compensates for spring and diaphragm effect. This
improves regulator rangeability and performance.
MONITOR REGULATOR
7
LS200 Series

Figure 4. Rearming Process
Installation
▲ WARNING
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
installed where service conditions
could exceed the limits given in
the Specifications section 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 limits.
Additionally, physical damage to the
regulator could cause personal injury or
property damage due to escaping gas.
To avoid such injury or damage, install
the regulator in a safe location.
Before installing the LS200 Series Regulator, inspect
it for shipping damage and ensure that the body and
orice are clean. Blow out the pipeline to remove pipe
scale and other foreign material.
The regulator may be installed in any position as long
as the ow through the body is the same as indicated
by the ow direction arrow on the body and the vent
opening is unobstructed and protected from the rain,
ice and other foreign material.
If the regulator has threaded end connections, coat
external threads with pipe compound. For anged end
connections, tighten the ange bolts evenly.
Parallel run with LS200 Series is recommended
to ensure continued operation during
maintenance windows.
The regulator must be protected from damage by
vehicles and other outside sources.
Overpressure Protection
The LS200 Series Regulator has an outlet pressure
rating lower than the inlet pressure rating. Some type
of overpressure protection is needed if the actual inlet
pressure exceeds the outlet pressure rating.
Maximum operating inlet pressure for the
LS200 Series Regulators is given in Table 4. All
models must be protected against inlet pressure above
their listed maximum.
Regulator operation below these emergency pressure
limitations does not preclude the possibility of damage
from external sources or from debris in the gas line.
ARMED REARMING
RESET
ARMED
TRIPPED
RESET
ARMED
TRIPPED
8
LS200 Series

The regulator should be inspected for damage after
any overpressure condition.
Reset Procedure
See Figure 4 for the rearming process. The rearm tool
is included with all LS200 Series units with slam-shut
option. If the tool is not readily available, a 17 mm
wrench can be used to rearm.
Rotate counterclockwise until the lever is pointed
down. Continue rotating past this point to rearm.
The lever should point to the Reset Point on the
cover. The lever should no longer rotate back to the
tripped position.
Downstream Control Line
▲ WARNING
Downstream control line is required for
proper operation of these regulators.
An external downstream control line must be
installed before putting the LS200 Series Regulators
in operation. Without the control line, the regulator
will remain wide open. The downstream control line
should be a pipe or tubing of at least 1/2 in. / 12.7 mm
diameter; connect it to the downstream pipe line at
least 5 to 10 pipe diameters from the regulator and in a
straight section of pipe.
The external downstream control line connection on
the LS200 Series Regulator is 1/4 NPT.
Vent
The LS200 Series vent uses a dampening assembly to
improve performance. The damper is connected to the
spring case with 1/2 NPT connection. It is screened to
prevent insects or foreign material from entering.
If a vent to the atmosphere is required for indoor
installations, remove the damper assembly and pipe
the vent to the outside.
The vent pipe should be as short as possible with
minimum number of bends or elbows. The pipe
should also have the largest practical diameter. Install
a weather and bug resistant vent assembly on the
outside end of the vent pipe.
For indoor installation that have been piped to the
outside and for outdoor installations, the vent opening
must be positioned so that water, ice and other foreign
material cannot enter the spring case. Use care not
to place the vent opening below downspouts, eaves,
doors, windows or air intakes. The vent opening
should be checked periodically to be sure that the
opening has not been plugged with foreign material.
On some installations it may be necessary to provide
additional protection from the elements.
Startup
▲ WARNING
If the downstream system is already
pressured by another regulator or by a
manual bypass, then extra precautions
must be taken when placing the
LS200 Series in service.
The outlet of the regulator must never
be subjected to pressure higher than the
inlet pressure or the balancing diaphragm
may be damaged. Also, the control line
pressure must never exceed the set point
dictated by the spring setting by more
than 3 psig / 0.21 bar or the valve seat or
diaphragm plates can be damaged.
The procedure used in putting the
regulator in service must be planned
accordingly. Pressure gauges should
always be used to monitor downstream
and control line pressures during startup.
If the downstream system is not pressured by
another regulator or by manual bypass, use the
following procedure:
1. Check to see that all appliances are turned o󰀨.
2. Slowly open the upstream shuto󰀨 valve.
3. Slowly open the downstream shuto󰀨 valve.
4. Check all connections for leaks.
5. Make nal control spring adjustments according to
the adjustment procedures.
Adjustment
▲ WARNING
To avoid personal injury, property
damage or equipment damage caused
by bursting of pressure containing
parts or explosion of accumulated
gas, never adjust the control spring to
maintain a control pressure higher than
the upper limit of the control pressure
9
LS200 Series

Table 9. Torque Requirement for Regulator Maintenance
KEY PART NUMBER DESCRIPTION SIZE TORQUE
Ft-lb N∙m
15 ERAA51785A0 Hex locknut 20 mm / 3/4 in. Socket 26 35
31 ERAA07626A0 Hex 30 mm / 1-1/4 in. Wrench 23 30
54 ERAA12336A0 Hex locknut/Nylon 20 mm / 3/4 in. Socket 26 39
34 ERAA12017A0 Torx screw - Orifice, Cage and Int Flange T20 Torx 3 3.2
21 ERAA07751A0 Travel Indicator 21 mm / 13/16 in. Socket 15 20
58 M0236660X12 Hex 3/4 NPT 14 18
17 M5009027X12 255 and 350 mm actuator - Hex cap screw 17 mm / 11/16 in Socket 18 24
22 ERAA12023A0 Hex cap screw 13 mm / 1/2 in. Socket 17 22
KEY PART NUMBER DESCRIPTION SIZE TORQUE
Ft-lb N∙m
202 GE38176X012 Hex cap screw 10 mm / 13/32 in. Socket 12 15
202 GE38176X012 Hex cap screw 10 mm / 13/32 in. Socket 6 8
228 M5011006X12 Hex socket cap screw 4 mm / 5/32 in. Hex Key 5 6
224 M5011019X12 Hex cap screw 5 mm / 3/16 in. Hex Key 8 10
216 ERAA49756A0 Hex socket set screw 2.5 mm Hex Key 3 3
Table 10. Torque Requirement for Slam-Shut Maintenance
Maintenance
This section includes instructions for disassembly
and replacement of parts. All key numbers refer to
Figures 5, 6 and 7, except where indicated. Reference
Torque Values Table 9 for specic values of each
key number.
▲ WARNING
To avoid personal injury, property
damage or equipment damage caused by
sudden release of pressure or explosion
of accumulated gas, do not attempt any
maintenance or disassembly without
rst isolating the regulator from system
pressure and relieving all internal
pressure from the regulator.
Regulators that have been disassembled
for repair must be tested for proper
operation before being returned to
service. Only parts manufactured by
Emerson should be used for repairing
Fisher™ regulators. Restart gas
utilization equipment according to normal
startup procedures.
To avoid personal injury due to the
sudden uncontrolled movement of
parts, do not loosen the diaphragm
casing cap screws (key 17 and 19) when
the control spring (key 13) has spring
range for that particular spring. If the
desired control pressure is not within
the range of the spring, install a spring
of the proper range according to the
Diaphragm and Spring Case Area
section of the maintenance procedure.
To increase the pressure setting, remove the closing
cap (key 6, Figures 5, 6 and 7) and turn the adjusting
screw (key 10) clockwise; to lower the setting, turn the
adjusting screw counterclockwise.
A pressure gauge should always be used when
adjustments are being made. Do not adjust the spring
to produce an outlet pressure setting above the limit
stamped on the nameplate, located on the casing. If
the required pressure setting is not within the range of
the spring in use, substitute with the correct spring or
a different actuator might be needed, refer to Table 4
for spring ranges and actuator sizes. When changing
the spring, also change the nameplate, located on the
casing flange, to indicate the outlet pressure range.
Shutdown
Isolate the regulator from the pressure system and
release pressure from the outlet and the control line.
Inlet pressure will then automatically be released as
the regulator opens up in response to the lowered
pressure on the diaphragm. If the unit or station
has a slam-shut, ensure the slam-shut has not
isolated pressure upstream or downstream before
beginning maintenance.
10
LS200 Series

force applied to it. Release the spring
compression as described in step 2
of Actuator Maintenance and Balance
Diaphragm Replacement.
Disk or Pad Maintenance
1. Isolate the regulator and bleed downstream
pressure to atmosphere.
2. Remove bolts (key 22) and diaphragm
plate (key 30).
3. Unscrew locknut (key 54) with 19 mm socket and
remove the disc (key 43) and O-ring (key 42). No
need to remove the actuator or hold the stem during
maintenance. Inspect the disc for damage and
replace if needed. Replace O-ring and locknut from
the kit.
4. Reassemble in reverse order. Replace disk
(key 43) and tighten locknut (key 54). Install the
bottom ange (key 44) with O-ring (key 32) and
4 bolts (key 22).
5. During reassembly, check all O-rings (key 32) to
be certain they are in good condition; replace if
necessary. Lubricate the O-ring with elastomer
sealant and lubricant. Apply anti-seize compound
liberally to the adjusting screw threads (key 10), as
indicated in Figures 5 to 6.
Actuator Maintenance (Figures 5 to 6)
△ CAUTION
Ensure to take extra care during aligning
of bolt holes as threads of bolts will
damage the diaphragm.
1. Isolate the regulator and bleed downstream
pressure to atmosphere.
2. Remove closing cap (key 6), rotate the adjusting
screw (key 10) counterclockwise until there is no
compression on the control spring (key 13).
3. Remove cap screws (key 17) from the
actuator (key 2).
4. Lift the spring case (key 2) and set aside.
Remove the control spring (key 13) and spring
seat (key 12).
5. Unscrew locknut (key 15), remove the lower
spring seat (key 14). Then remove diaphragm
plate (key 5).
6. Diaphragm (key 4) should now be loose and can
be replaced.
7. Align bolt holes before tightening down locknut
(key 15).
8. Set diaphragm (key 4), diaphragm head (key 5)
and spring seat (key 14). Align bolts (key 17), lift
stem (key 37) and allow full assembly to settle
which aligns the balance diaphragm (key 28) and
main diaphragm. Once aligned with bolts, tighten
down locknut (key 15) to 25.1 ft-lb / 30 N∙m. Do
not overtighten.
9. During reassembly, ensure that all O-rings
(keys 24, 25, 33, 48, 47 and 57) are in good
condition; replace if necessary. Lubricate with
elastomer sealant and lubricant. Apply anti-seize
compound liberally to the adjusting screw threads
(key 10), as indicated in Figures 5 to 6.
Balance Diaphragm Replacement
1. Isolate the regulator and bleed downstream pressure
to atmosphere. Once pressure upstream and
downstream have bled to 0, manually trip the slam-
shut to release the spring energy in the trim.
2. Remove closing cap (key 6), rotate the adjusting
screw (key 10) counterclockwise until there is no
compression on the control spring (key 13).
3. If slam-shut is included, remove the slam-shut
mechanism from the body. Remove 4 bolts (key 224)
from the box and pull entire slam-shut o󰀨 the body.
Careful of the O-ring seal between the body to
avoid damage. Set aside protecting the cam and
sealing surface.
4. Remove cap screws (key 17) from the
actuator (key 2).
5. Lift the spring case (key 2) and set aside.
Remove the control spring (key 13) and spring
seat (key 12).
6. Unscrew locknut (key 15), remove the lower
spring seat (key 14). Then remove diaphragm
plate (key 5).
7. Diaphragm (key 4) should now be loose and can
be replaced.
8. Remove the 4 intermediary ange screws (key 22)
and lift actuator assembly and trim out of the
body (key 1).
9. Carefully place the lower casing edge (key 3) on a
surface protecting the sealing area.
11
LS200 Series

Parts Ordering
When corresponding with your local Sales Office about
this regulator, include the type number, serial number
and other information stamped on the nameplate.
When ordering replacement parts, reference the key
number of each needed part and specify the eleven
character part number as found in the following
parts list.
10. Remove locknut (key 54) on the disk assembly
(key 43) and remove disk.
11. Remove screws (key 34) then remove the orifice
(key 38) and cage (key 35) from the intermediary
flange (key 26).
12. Remove locknut (key 31) using a 30 mm key and
hold the stem (key 37) in place by the hex feature
using a 16 mm key.
13. Remove the balance diaphragm plate (key 30).
14. Remove and replace balance diaphragm (key 28).
Lightly grease the outside and inside of the
balance diaphragm before reassembly.
15. Reassemble the locknut (key 31) using a 30
mm key and hold the stem (key 37) in place by
the hex feature using a 16 mm key at 25.1 ft-lb /
30 N•m torque.
16. Insert stem (key 37) into cage (key 35), make
sure that balance diaphragm (key 28) is mounted
correctly on intermediary flange (key 26)
inner groove.
17. Mount the cage (key 35) on balance diaphragm
(key 28) on indicated position, make sure the
stem hex feature engages with the one on the
cage (upper diameter edge should enter below
intermediary flange top diameter).
18. Assemble screws (key 34) to fix the cage (key 35)
and orifice (key 38) from the intermediary flange
(key 26). Make sure the gap between cage
and intermediary flange is equal on outside
circle diameter.
19. Put the trim back into body (key 1) and assemble
the 4 intermediary flange screws (key 22).
20. Ensure that the serrated washer (key 29) and
O-ring (key 57) are in right position.
21. Assemble main diaphragm (key 4), replace with a
new one if necessary.
22. Reassemble in reverse order parts above main
diaphragm (key 4).
23. During reassembly, ensure that all O-rings
(keys 24, 25, 33, 48, 47 and 57) are in good
condition; replace if necessary. Lubricate with
elastomer sealant and lubricant. Apply anti-seize
compound liberally to the adjusting screw threads
(key 10), as indicated in Figures 5 to 6.
Replacing Orifice or Seat
1. Isolate the regulator and bleed downstream
pressure to atmosphere. Once pressure upstream
and downstream have bled to 0, manually trip the
slam-shut to release the spring energy in the trim.
2. Remove closing cap (key 6), rotate the adjusting
screw (key 10) counterclockwise until there is no
compression on the control spring (key 13).
3. If slam-shut is included, remove the slam-shut
mechanism from the body. Remove 4 bolts
(key 224) from the box and pull entire slam-shut
o󰀨 the body. Careful of the O-ring seal between
the body to avoid damage. Set aside protecting
the cam and sealing surface.
4. Remove the 4 bonnet screws (key 22) and lift
actuator assembly and trim out of the body (key 1).
5. Carefully place the actuator on a surface
protecting the travel indicator (key 21) and the
vent assembly.
6. Remove locknut (key 54) on the disc assembly
(key 43) and remove disk.
7. Remove the two torx screws (key 34) to remove
the orice (key 38) from the cage (key 35). Keep
the cage connected to the bonnet (key 26). If unit
has a slam-shut option, inspect the slam-shut disc
(key 204) for damage or cuts.
8. Change out the orice (key 38) with new part
and reassemble.
9. During reassembly, ensure that all O-rings
(keys 32, 40 and 42) are in good condition; replace
if necessary. Lubricate the O-ring with elastomer
sealant and lubricant. Apply anti-seize compound
liberally to the adjusting screw threads (key 10), as
indicated in Figures 5 to 6.
12
LS200 Series

*Recommended Spare Part.
Key Description Part Number
Parts List
Key Description Part Number
Spare Parts Kit See Repair Kit Table
1 Body See Key 1 Table
2 Upper Casing, Steel
Types LS220 and LS224 ERAA10668A0
Types LS250 and LS254 ERAA10667A0
3 Lower Casing, Steel
Types LS220 and LS224 ERAA09262A0
Types LS250 and LS254 ERAA09273A0
4* Diaphragm, Nitrile (NBR)
Types LS220 and LS224 ERAA07476A0
Types LS250 and LS254 ERAA07454A0
5 Diaphragm Head, Steel
Types LS220 and LS224 ERAA10663A0
Types LS250 and LS254 ERAA10662A0
6 Protective Cap, Nylon ERAA50712A0
7 Bonnet, Steel ERAA50689A0
10 Adjusting Screw, Steel ERAA07799A0
11 Ball, Stainless steel M4500530X12
12 Upper Spring Seat, Steel ERAA50770A0
13 Spring, Steel
0.3 to 0.35 bar / 4.35 to 5.1 psig, Light Green ERAA07586A0
0.3 to 0.73 bar / 4.35 to 10.6 psig, Pink ERAA07589A0
0.33 to 1.08 bar / 4.8 to 15.7 psig, Dark Blue ERAA07592A0
0.57 to 1.5 bar / 8.3 to 21.75 psig, Orange ERAA07283A0
14 Lower Spring Seat, Steel ERAA50696A0
15* Locknut, Steel ERAA51785A0
16 Nameplate - - - - - - - - - - -
17 Bolt, Steel ERAA53025A0
18 Eyenut Nut, Steel M5043007X12
19 Nut, Steel ERAA12217A0
20* O-ring, Nitrile (NBR) ERAA42931A2
21* Travel Indicator Assembly, Brass
Types LS220 and LS224 ERAA14511A0
Types LS250 and LS254 ERAA14798A0
21a Fitting ERAA07751A0
21b Stem, Stainless steel ERAA07781A0
21c* O-ring, Nitrile (NBR) ERAA12026A0
21d O-ring, Nitrile (NBR) 1H2926X0032
21e Bushing Indicator, Brass ERSA02798A0
21f Cover Assembly, Polymer M0210910X12
21g Nameplate, Polymer - - - - - - - - - - -
21h End Piece, Brass
Types LS220 and LS224 ERAA07793A0
Types LS250 and LS254 ERAA51739A0
21j Spring, Brass ERAA51766A0
21k Pointer, Brass M0229000X12
22 Screw, Steel ERAA12023A0
23* Backup Ring ERAA12012A0
24* O-ring, Nitrile (NBR) ERAA12013A0
25* O-ring, Nitrile (NBR) ERAA12008A0
26 Intermediate Flange, NItirle (NBR)
Types LS220 and LS224 ERAA10701A0
Types LS250 and LS254 ERAA52058A0
27 Balance Diaphragm Head, Nitrile (NBR) ERAA51970A0
28* Balance Diaphragm, Nitirle (NBR) ERAA07724A0
29 Serrated Washer, Steel ERAA51778A0
30 Balance Diaphragm Plate, Steel ERAA51960A0
31 Retaining Nut, Steel ERAA07626A0
32* O-ring, Nitrile (NBR) ERAA52798A0
33* O-ring, Nitrile ERAA51959A0
34 Screw, Steel ERAA52386A0
35 Cage, Stainless steel ERAA10702A0
36* Stem Bushing ERAA49971A0
37 Stem, Stainless steel ERAA50684A0
38* Orifice, Stainless steel ERAA13221A0
39 Hole Plug, Brass ERAA11283A0
40* Gasket, Nitrile (NBR) ERAA12018A0
41 Pad Retainer, Steel
100% capacity, Types LS220 and LS224 ERAA51481A0
100% capacity, Types LS250 and LS254 ERAA52946A0
60% capacity, All types ERAA51820A0
40% capacity, All types ERAA52867A0
78% capacity, All types ERAA53097A0
42* O-ring, Nitrile (NBR) 1F2613X0012
43* Pad Assembly, Steel and Nitrile (NBR)
Single sided ERAA07637A1
Double sided ERAA12823A1
44 Bottom Flange, Steel ERAA07518A0
45 Nut, Steel ERAA53059A0
46 Sealing Washer, Nitrile (NBR) 11A9681X012
47* O-ring GE18400X022
48 Plug 1A369235072
53 Lock Pin, Stainless steel ERAA51580A0
54* Locknut, Steel ERAA12336A0
56* Stem Guide, Nylon ERAA50073A0
57* O-ring, Nitrile (NBR) 1F113906992
58* Damper Assembly M8090197X12
Slam Shut Device
Key Description Part Number
26* Gland Sleeve, Brass ERAA52345A0
30* Protective Cap, Brass ERAA52346A0
110* Shutter, Steel ERAA09134A0
199 Type VSX8 Assembly See Type VSX8 Instruction Manual
200 Blanking Plug, Aluminum GE31255X012
201 Half Ring Flange, Steel GF01942X012
202 Screw, Steel GE38176X012
203* O-ring, Nitrile (NBR) GF03443X012
204* Pad Assembly, Steel or Nitrile (NBR) M0236560X32
205 Spring Holder, Brass ERAA49374A0
206* Anti friction Ring, Bronze filled
Polytetrafluoroethylene (PTFE) M0236980X12
207* O-ring, Nitrile (NBR) FA400519X12
208 Main Spring, Steel ERAA09265A0
209* Snap Ring M4500515X12
210 Spring, Steel ERAA53299A0
211 Mechanism Box, Ductile iron ERAA46519A0
212 Lever 2 ERAA52158A0
213 Latching Pin, Stainless steel ERAA46552A0
214 Lever 1, Cast steel ERAA46523A0
215 Shaft, Stainless steel ERAA46550A0
216* Threaded Pin, Steel ERAA49756A0
217 Bushing, Brass ERAA50286A0
218* O-ring, Nitrile (NBR) ERAA49833A0
219* Baseplate Bushing, Polymer ERAA50072A0
220 Cam, Stainless steel ERAA49540A0
221* O-ring, Nitrile (NBR) M6010013X12
222 Lid, Ductile iron ERAA51898A0
223* Gasket, Nitrile (NBR) ERAA51913A0
224 Screw, Steel M5011019X12
225 Base Plate, Steel ERAA50038A0
226 Torsion Spring, Steel ERAA46779A0
227* O-ring, Nitrile (NBR) ERAA50661A0
228 Screw, Steel M5011006X12
229* Gasket, Nitrile (NBR) ERAA51439A0
230 Reloading Nameplate, Aluminum ERAA53509A0
231 Drive screw, Stainless steel M4500027X12
232 Wrench , Aluminum M0193731X12
233 Silencer, Brass M4500367X12
13
LS200 Series

Repair Kit
SPARE PART KITS ACTUATOR TYPE (SIZE) KEY KIT PART NUMBER
Pad Repair Kit All (single side) 32, 42, 43, 54 RLS2PAD10A0
All (double side) 32, 42, 43, 54 RLS2PAD20A0
Orifice Kit All 32, 38, 40, 42, 54 RLS2ORFC0A0
All with slam shut device 32, 38, 40, 42, 54, 203, 206, 207, 223 RLS24ORFCA0
Balance Port Kit
All 15, 20, 23, 24, 28, 32, 33, 42, 47,
54, 57 RLS2BALN0A0
All with slam shut device 15, 20, 23, 24, 28, 32, 33, 42, 47, 54,
57, 203, 223 RLS2XBALNA0
Actuator Kit LS220 (350 mm) 4, 15, 20, 21C, 33, 57 RLS220ACTA0
LS250 (255 mm) 4, 15, 20, 21C, 33, 57 RLS250ACTA0
Full Rebuild Kit
LS220 (350 mm) 4, 15, 20, 21C, 23, 24, 25, 28, 32, 33,
36, 38, 40, 42, 43, 47, 54, 56, 57 RLS220REBA0
LS250 (255 mm) 4, 15, 20, 21C, 23, 24, 25, 28, 32, 33,
36, 38, 40, 42, 43, 47, 54, 56, 57 RLS250REBA0
LS200 (475 mm) with
slam shut device
4, 15, 20, 21C, 23, 24, 25, 28, 32, 33,
36, 38, 40, 42, 43, 47, 54, 56, 57 RLS204REBA0
LS220 (350 mm) with
slam shut device
4, 15, 20, 21C, 23, 24, 25, 28, 32, 33,
36, 38, 40, 42, 43, 47, 54, 56, 57, 203,
204, 206, 207, 209, 216, 218, 219,
221, 223, 227, 229, 21C
RLS224REBA0
LS250 (255 mm) with
slam shut device
4, 15, 20, 21C, 23, 24, 25, 28, 32, 33,
36, 38, 40, 42, 43, 47, 54, 56, 57, 203,
204, 206, 207, 209, 216, 218, 219,
221, 223, 227, 229, 21C
RLS254REBA0
Travel Indicator LS220 (350 mm) 21 RLS220TVLA0
LS250 (255 mm) 21 RLS250TVLA0
Vent All 58 RLS20VENTA0
Slam Shut Device VSX8 All 203 RLS20VSX8A0
14
LS200 Series

Key 1, Body Materials and Part Numbers
BODY SIZE BODY MATERIAL END CONNECTION STYLE(1) SLAM-SHUT POSITION PART NUMBER
2x2
Ductile iron
CL150 RF
L-R ERAA52444A0
R-L ERAA52446A0
W/O ERAA52448A0
L-R and R-L ERAA09111A0
PN 16
L-R ERAA52432A0
R-L ERAA52445A0
L-R and R-L ERAA09124A0
W/O ERAA52447A0
WCC
CL150 RF
L-R ERAA52451A0
R-L ERAA52452A0
L-R and R-L ERAA07381A0
W/O ERAA08618A0
PN 16
L-R ERAA52449A0
R-L ERAA52450A0
L-R and R-L ERAA07419A0
NPT
L-R ERAA52453A0
R-L ERAA52473A0
L-R and R-L ERAA12504A0
W/O ERAA08366A0
Cast iron CL125 FF W/O ERAA09046A0
NPT W/O ERAA09096A0
2x4
Ductile iron
CL150 RF
L-R ERAA52476A0
R-L ERAA52478A0
L-R and R-L ERAA09149A0
W/O ERAA52492A0
PN 16
L-R ERAA52475A0
R-L ERAA52477A0
L-R and R-L ERAA09157A0
W/O ERAA52489A0
WCC
CL150 RF
L-R ERAA52480A0
R-L ERAA52484A0
L-R and R-L ERAA08233A0
W/O ERAA08630A0
PN 16
L-R ERAA52479A0
R-L ERAA52481A0
L-R and R-L ERAA08234A0
Cast iron CL125 FF W/O ERAA09121A0
15
LS200 Series

(Ø 350)
B
B
A
A
6
7
5
4
1
10
12
11
13
15
53
17
19
24
26
28
30
35
37
56
40
44
20
L2
21C
10
39
L1
21C
L1
L2
L2
L2
L2
L1
L1
L1
L1
22
18
17
L2
22
L2
22
34
L2
34
L3
L1
L1
L1
L1
L3
L1
L1
32
54
43
42
41
38
32
47
3
25
2
27
31
46
L2
29
L1
57
L2
58
L1
33
45
36
14
23
Figure 5. Type LS220 Assembly
1. Lubricants must be selected such that they meet the temperature requirements.
APPLY LUBRICANT (L)(1):
L1 = GENERAL PURPOSE PTFE OR LITHIUM GREASE
L2 = ANTI-SEIZE COMPOUND
L3 = THREAD LOCKER
PRESSURE LOADED OPTION
SECTION A-A
SECTION B-B
16
LS200 Series

1. Lubricants must be selected such that they meet the temperature requirements.
APPLY LUBRICANT (L)(1):
L1 = GENERAL PURPOSE PTFE OR LITHIUM GREASE
L2 = ANTI-SEIZE COMPOUND
L3 = THREAD LOCKER
PRESSURE LOADED OPTION
SECTION A-A
SECTION B-B
(Ø 255) B
AA
B
6
10
L2
16
21
L2
20
L1
12
L2
11
13
15
53
39
5
4
L2
17
19
L2
21C
L1
24
26
30
35
37
56
L1
22 18
17
L2
22
L2
22 L2
34
34
L3
L1
40
44 32
L1
L1
7
L2
42 L1
32 L1
47 L1
25 L1
31 L3
3
2
41
41
38
54
43
1
14 L2
57 L1
58 L2
33 L1
45
27
23
36
29
Figure 6. Type LS250 Assembly
17
LS200 Series

SECTION A-A
SECTION C-C
SECTION B-B
Figure 7. LS200 Series Slam-Shut Device Assembly
1. Lubricants must be selected such that they meet the temperature requirements.
APPLY LUBRICANT (L)(1):
L1 = GENERAL PURPOSE PTFE OR LITHIUM GREASE
L2 = ANTI-SEIZE COMPOUND
L3 = THREAD LOCKER
A
A
J
K
B B
CC
F
F
ARMED
RESET
TRIPPED
D
D
208
224
213
212
214
217221
206
L1
L1
207
L1
228
L2
233
225
L2
203
L1 223
L1 227 L1
210
204
209
232
230
119
205
228 226
219
L2
218
215
222
L1
202 L2
229211
216 L3
231
18
LS200 Series

216
220
L3
200 202
201
L2
202 L2
SECTION F-F
SECTION E-E
SECTION K
Figure 7. LS200 Series Slam-Shut Device Assembly
1. Lubricants must be selected such that they meet the temperature requirements.
APPLY LUBRICANT (L)(1):
L2 = ANTI-SEIZE COMPOUND
L3 = THREAD LOCKER
19
LS200 Series

D104616X012 © 2022 Emerson Process Management Regulator
Technologies, Inc. All rights reserved. 12/22.
The Emerson logo is a trademark and service mark of Emerson Electric Co.
All other marks are the property of their prospective owners.
Fisher™ is a mark owned by Fisher Controls International LLC, a business
of Emerson Automation Solutions.
The contents of this publication are presented for informational purposes
only, and while every e󰀨ort 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. All sales are governed by our terms and conditions, which
are available upon request. We reserve the right to modify or improve the
designs or specications of such products at any time without notice.
Emerson Process Management Regulator Technologies, Inc does not
assume responsibility for the selection, use or maintenance of any product.
Responsibility for proper selection, use and maintenance of any Emerson
Process Management Regulator Technologies, Inc. product remains solely
with the purchaser.
LS200 Series
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