Fisher 1098-EGR, 1098H-EGR Instruction Manual
Instruction Manual
Form 5084
December 2008
Types 1098-EGR and 1098H-EGR
Types 1098-EGR and 1098H-EGR Pressure
Reducing Regulators
WARNING
!
Failure to follow these instructions or
to properly install and maintain this
equipment could result in an explosion,
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 Fisher 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.
Installation, operation, and maintenance
personnel may result in improper
adjustment and unsafe operation. Either
condition may result in equipment
personnel when installing, operating,
and maintaining the Types 1098-EGR and
1098H-EGR pressure reducing regulator.
Introduction
Scope of Manual
This manual describes and provides instructions
and parts list for Type 1098-EGR or 1098H-EGR
regulator complete with a standard P590 Series
lter and either a 6350 Series regulator, a 61 Series
pilot, or a Type Y600AM Pilot. The Type 1806 relief
valve is also covered when a 61 Series pilot is used.
Instructions and parts lists for monitoring pilots and
other equipment used with this regulator are found in
separate manuals.
W6956
Figure 1. Type 1098-EGR
Description
Types 1098-EGR and 1098H-EGR regulators provide
economical and accurate pressure control in a
wide variety of applications; natural gas distribution
systems; fuel gas supply to industrial boilers, furnaces,
ovens, and mixers; and large commercial/industrial
establishments such as shopping centers and schools.
They are also used in plant air service and in liquid
service where a slow stroking time (approximately
30 to 90 seconds) is desired on both opening and
closing the main valve.
The Specications section lists pressure limitations
and other specications for various Types 1098-EGR
and 1098H-EGR constructions. Specications for a
given regulator as it originally comes from the factory
are stamped on nameplates located on both the
www.emersonprocess.com/regulators
D100339X012
Types 1098-EGR and 1098H-EGR
Body Sizes and End Connection Styles
See Table 1
Main Valve Maximum Inlet Pressure
(1)
400 psig (27,6 bar) or body rating limit whichever
is lower
Maximum Pilot Supply Pressure
(1,2)
600 psig (41,4 bar)
Outlet Pressure Ranges
See Table 2
Main Valve Flow Direction
In through the seat ring and out through the cage
Pressure Registration
External
Material Temperature Capabilities
Nitrile (NBR):
-20° to 180°F (-29° to 82°C)
Fluorocarbon (FKM):
0° to 300°F (-18° to 149°C),
Water is limited to 0° to 180°F (-18° to 82°C)
Maximum and Minimum Differential Pressures
See Table 4
Actuator Sizes and Maximum Pressures
See Table 3
Main Valve Flow Characteristic
Linear (standard) or Quick opening
Ethylenepropylene (EPR):
-20° to 275°F (-29° to 135°C)
Options
• NACE Construction
• Boiler Fuel Construction
• Aqueous Service Construction
• Monitor Conguration
• Noise Abatement Trim
1. The pressure/temperature limits in this instruction manual or any applicable standard limitation should not be exceeded.
2. For stability or overpressure protection, a reducing regulator may be installed upstream of the pilot according to the Installation section.
Table 1. Body Sizes and End Connection Styles
BODY SIZE,
INCHES (DN)
1 or 2
(25 or 50)
3, 4, or 6
(80, 100 or 150)
8 x 6 or 12 x 6
(200 x 150 or 300 x 150)
CAST IRON STEEL OR STAINLESS STEEL
NPT, CL125 FF, or CL250 RF
CL125 FF or CL250 RF
- - - -
NPT, CL150 RF, CL300 RF, CL600 RF,
BWE, SWE, or PN 16/25/40
CL150 RF, CL300 RF, CL600 RF,
CL150 RF, CL300 RF, CL600 RF,
(2)
BWE, or PN 16/25/40
BWE, or PN 16/25/40
Table 2. Outlet Pressure Ranges
PILOT TYPE OUTLET (CONTROL) PRESSURE RANGES SPRING COLOR SPRING PART NUMBER
6351
6352
6353
(1)
6354L
(2)
6354M
6354H
61L
61LD
61LE
61H 10 to 65 psig (0,69 to 4,5 bar) Green Stripe 0Y066427022
61HP
Y600AM
1. Without diaphragm limiter.
2. With diaphragm limiter.
3 to 20 psig
5 to 35 psig
35 to 100 psig
14-inches w.c. to 2 psig
2 to 10 psig
3 to 40 psig
35 to 125 psig
85 to 200 psig
175 to 220 psig
200 to 300 psig
0.25 to 2 psig
1 to 5 psig
2 to 10 psig
5 to 15 psig
10 to 20 psig
15 to 45 psig
35 to 100 psig
100 to 300 psig
4 to 8-inches w.c.
7 to 16-inches w.c.
15-inches w.c. to 1.2 psig
1.2 to 2.5 psig
2.5 to 4.5 psig
4.5 to 7 psig
(0,21 to 1,4 bar)
(0,34 to 2,4 bar)
(2,4 to 6,9 bar)
(35 mbar to 0,14 bar)
(0,14 to 0,69 bar)
(0,21 to 2,8 bar)
(2,4 to 8,6 bar)
(5,9 to 13,8 bar)
(12,1 to 15,2 bar)
(13,8 to 20,7 bar)
(0,02 to 0,14 bar)
(0,07 to 0,34 bar)
(0,14 to 0,69 bar)
(0,34 to 1,0 bar)
(0,69 to 1,4 bar)
(1,0 to 3,1 bar)
(2,4 to 6,9 bar)
(6,9 to 20,7 bar)
(10 to 20 mbar)
(17 to 40 mbar)
(37 mbar to 0,08 bar)
(0,83 to 0,17 bar)
(0,17 to 0,31 bar)
(0,31 to 0,48 bar)
(1)
(2)
(2)
Green
Silver
Red
Yellow
Black
Yellow
Red
Blue
Blue
Green
Red
Yellow
Blue
Brown
Green
Yellow
Blue
Red
Red
Olive Drab
Yellow
Light Green
Light Blue
Black
1B986027212
1B788327022
1K748527202
14A9672X012
14A9673X012
1E392527022
1K748527202
1L346127142
1L346127142
15A9258X012
1B886327022
1J857827022
1B886427022
1J857927142
1B886527022
1E392527022
1D387227022
1D465127142
1B653827052
1B653927022
1B537027052
1B537127022
1B537227022
1B537327052
2
Types 1098-EGR and 1098H-EGR
Table 3. Actuator Sizes and Maximum Pressures
ACTUATOR
Type Size
1098
1098H 30 300 (20,7) 400 (27,6)
30
40 (standard)
70
OUTLET (CONTROL) PRESSURE, PSIG (bar) EMERGENCY CASING PRESSURE, PSIG (bar)
100 (6,9)
75 (5,2)
50 (3,5)
Table 4. Maximum and Minimum Differential Pressures for Main Valve Selection
BODY SIZE,
INCHES (DN)
1 (25)
2 (50)
3 (80)
4 (100)
6, 8 x 6, and 12 x 6
(150, 200 x 150,
and 300 x 150)
1. Maximum inlet pressure is equal to set pressure plus maximum differential.
2. Requires special 6300 Series pilot construction without integral relief valve and with external Type 1806 40 psid (2,8 bar d) relief valve.
SPRING PART
NUMBER AND COLOR
14A9687X012 Green 60 (4,1) 3.5 (0,24) 2.5 (0,17) 1 (0,07)
14A9680X012 Blue 125 (8,6) 5 (0,34) 4 (0,28) 1.5 (0,10)
14A9679X012 Red 400 (27,6) or body rating limit, whichever is lower 7 (0,48) 5 (0,34) 2.5 (0,17)
14A6768X012 Yellow 20 (1,4) - - - - 2 (0,14) 1 (0,07)
14A6626X012 Green 60 (4,1) 4 (0,28) 3 (0,21) 1.5 (0,10)
14A6627X012 Blue 125 (8,6) 6 (0,41) 5 (0,34) 2 (0,14)
14A6628X012 Red 400 (27,6) or body rating limit, whichever is lower 11 (0,76) 10 (0,69) 3 (0,21)
14A6771X012 Yellow 20 (1,4) - - - - 2.5 (0,17) 1 (0,07)
14A6629X012 Green 60 (4,1) 5 (0,34) 4 (0,28) 2 (0,14)
14A6630X012 Blue 125 (8,6) 8 (0,55) 6 (0,41) 2.5 (0,17)
14A6631X012 Red 400 (27,6) or body rating limit, whichever is lower 14 (0,97) 11 (0,76) 4 (0,28)
14A6770X012 Yellow 20 (1,4) - - - - 3.5 (0,24) 1.3 (0,09)
14A6632X012 Green 60 (4,1) 10 (0,69) 5 (0,34) 2.5 (0,17)
14A6633X012 Blue 125 (8,6) 13 (0,90) 8 (0,55) 3 (0,21)
14A6634X012 Red 400 (27,6) or body rating limit, whichever is lower 22 (1,5) 13 (0,90) 5 (0,34)
15A2253X012 Yellow 20 (1,4) - - - - 6 (0,41) 2.2 (0,15)
14A9686X012 Green 60 (4,1) 13 (0,90) 9.5 (0,66) 4 (0,28)
14A9685X012 Blue 125 (8,6) 19 (1,3) 14 (0,97) 6 (0,41)
15A2615X012 Red 400 (27,6) or body rating limit, whichever is lower 28 (1,9)
MAXIMUM ALLOWABLE DIFFERENTIAL
PRESSURE, PSIG (bar)
(1)
MINIMUM DIFFERENTIAL PRESSURE REQUIRED
FOR FULL STROKE, PSIG (bar)
Size 30 Actuator Size 40 Actuator Size 70 Actuator
(2)
115 (7,9)
82 (5,7)
65 (4,5)
19 (1,3) 8 (0,55)
Table 5. Supply Pressure Settings Required for the Type 95H Regulator
BODY SIZE,
INCHES (DN)
1 (25)
2 (50)
3 (80)
4 (100)
6 (150)
8 X 6 (200)
1. The pressures shown in the table are the minimum supply pressures required by the pilot. If the inlet pressure is less than shown, an external pilot supply is necessary.
TYPE EGR
SPRING COLOR
Green
Blue
Red
Green
Blue
Red
Green
Blue
Red
Green
Blue
Red
Green
Blue
Red
Red Olive Drab Yellow Green Light Blue Black
6
13
14
11
16
13
17
22
7
8
6
8
7
9
8
(0,41)
(0,48)
(0,55)
(0,41)
(0,55)
(0,90)
(0,48)
(0,62)
(0,97)
(0,55)
(0,76)
(1,10)
(0,90)
(1,17)
(1,5)
13
14
11
16
13
17
22
6
7
8
6
8
7
9
8
(0,41)
(0,48)
(0,55)
(0,41)
(0,55)
(0,90)
(0,48)
(0,62)
(0,97)
(0,55)
(0,76)
(1,1)
(0,90)
(1,2)
(1,5)
SUPPLY PRESSURE, PSIG (bar)
Type Y600AM Spring Color
7
(0,48)
8
(0,55)
9
(0,62)
7
(0,48)
9
(0,62)
14
(0,97)
8
(0,55)
10
(0,69)
15
(1,0)
9
(0,62)
12
(0,83)
17
(1,2)
14
(0,97)
18
(1,2)
23
(1,6)
8
(0,55)
10
(0,69)
11
(0,76)
9
(0,62)
11
(0,76)
16
(1,1)
10
(0,69)
12
(0,83)
17
(1,2)
11
(0,76)
14
(0,97)
19
(1,3)
15
(1,0)
20
(1,4)
25
(1,8)
11
(0,76)
13
(0,90)
14
(0,97)
12
(0,83)
14
(0,97)
19
(1,3)
13
(0,90)
15
(1,0)
20
(1,4)
14
(0,97)
17
(1,2)
22
(1,5
18
(1,2)
23
(1,6)
28
(1,9)
13
(0,90)
14
(0,97)
15
(1,0)
13
(0,90)
15
(1,0)
20
(1,4)
14
(0,97)
16
(1,1)
21
(1,5)
15
(1,0)
18
(1,2)
23
(1,6)
20
(1,4)
24
(1,6)
29
(2,0)
3
Types 1098-EGR and 1098H-EGR
TYPE 6351
TYPES 6352,
6353, 6354
A6563
INLET PRESSURE
OUTLET PRESSURE
ATMOSPHERIC PRESSURE
LOADING PRESSURE
6350 SERIES
TYPE 1806
A6641
INLET PRESSURE
OUTLET PRESSURE
ATMOSPHERIC PRESSURE
LOADING PRESSURE
4
TYPE 61LD
Figure 2. Operational Schematics
95 SERIES
Types 1098-EGR and 1098H-EGR
OPTIONAL:
TYPE 112 RESTRICTOR
M1008
INLET PRESSURE
OUTLET PRESSURE
ATMOSPHERIC PRESSURE
LOADING PRESSURE
PILOT SUPPLY PRESSURE
TYPE Y600AM
TYPE Y600AM WITH TYPE 95H SUPPLY REGULATOR
SCREW-ON
TRAVEL STOP
THREADED
SPRING SEAT
W3419–1
DETAIL OF TYPE 1098H ACTUATOR
Figure 2. Operational Schematics (continued)
W3161–1*
DETAIL OF OPTIONAL
RESTRICTED CAPACITY CONSTRUCTION
5
Types 1098-EGR and 1098H-EGR
actuator and main valve body, while the pilot control
spring range is displayed on the pilot spring case, and
the pilot restriction code is stamped on the pilot body
(S = standard gain, L = low gain, and H = high gain).
Principle of Operation
The pilot-operated Types 1098-EGR and 1098H-EGR
regulators both use inlet pressure as the operating
medium, which is reduced through pilot operation to load
the actuator diaphragm. Outlet or downstream pressure
opposes loading pressure in the actuator and also
opposes the pilot control spring. The Type 1098-EGR
regulator operation schematic is shown in Figure 2.
In operation, assume that outlet pressure is below
the pilot control setting. Control spring force on
the pilot diaphragm thus opens the pilot valve plug
providing additional loading pressure to the actuator
diaphragm. This loading pressure forces the actuator
stem forward, opening the main valve plug via a bump
connection. The upward motion of the plug allows gas
to ow through the cage into the downstream system.
40 PSI (2,8 bar) Relief Valve
A mounting assembly for a 40 psi (2,8 bar) differential
relief valve is available for the Type 1098-EGR. The
standard 25 psi (1,7 bar) differential relief valve
construction is integrally mounted between the loading
and downstream pressures in the 6351 through
6354 Series regulating pilots. Both differential relief
valves protect the main regulator diaphragm from
damage that may occur from too high differential
between the loading pressure and downstream pressure.
The 40 psi (2,8 bar) differential relief valve construction
is designed specically for the red main valve spring
selection in the 6-inch (DN 150) Type 1098-EGR-6354
with the size 30 actuator. This construction uses the
Type 1806H relief valve (with a setting of 40 psi
(2,8 bar)) to relieve excess loading pressure and does not
interfere with the normal operation of the regulator.
Installation and Startup
WARNING
!
When downstream demand has been satised, outlet
pressure tends to increase, acting on the pilot and
actuator diaphragms. This pressure exceeds the pilot
control spring setting, moving the pilot diaphragm away
and letting the valve plug spring (Type 6351, 61 Series, or
Y600AM pilots) or bellows (Types 6352 through
6354M pilots) close the pilot valve plug (unbalanced in the
Type 6351 or 61 Series pilots but balanced in the
Types 6352 through 6354M pilot). Excess loading
pressure on the actuator diaphragm escapes downstream
through the bleed hole (Type 6351 pilot), bleed orice
(61 Series pilot), restriction (Types 6352 through
6354M pilots) or xed restrictor (Type Y600AM pilot).
Reduced actuator loading pressure permits the main
valve to close. The combination of main valve spring
force and valve plug unbalance provides positive valve
plug shutoff against the port and upper seals.
To protect the Type 1098 or 1098H actuator diaphragm
from excessive differential pressure, the 6300 Series
pilots have a relief valve that allows loading pressure to
bleed downstream at approximately 25 psig (1,7 bar)
differential across the actuator diaphragm. An external
relief valve (Type 1806) is required when differential is
higher than 25 psid (1,7 bar d) or when using the
61 or Y600A Series pilots.
Personal injury, equipment damage, or
leakage due to escaping accumulated
gas or bursting of pressure-containing
parts may result if this regulator is
overpressured or is installed where
service conditions could exceed the limits
on the appropriate nameplate, 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 to prevent service conditions from
exceeding those limits.
Additionally, physical damage to the
regulator may result in personal injury
and property damage due to escaping
accumulated gas. To avoid such injury
and damage, install the regulator in a
safe location.
Standard Single-Pilot Regulator
(Figure 3)
Installations
A Type 1098-EGR or 1098H-EGR regulator bleeds
no gas to the atmosphere, making it suitable for
installation in pits or other enclosed locations without
6
Types 1098-EGR and 1098H-EGR
elaborate venting systems. This regulator can also be
installed in pits subject to ooding by venting the pilot
spring case above the expected ood level so that the
pilot diaphragm is exposed to atmospheric pressure.
Note
Normal pressure drop assists shutoff.
Therefore, leakage may result during any
reverse pressure drop condition.
1. Use qualied personnel when installing, operating,
and maintaining regulators. Before installing,
inspect the main valve, pilot, and tubing for any
shipment damage or foreign material that may
have collected during crating and shipment. Make
certain the body interior is clean and the pipelines
are free of foreign material. Apply pipe compound
only to the male pipe threads with a screwed
body, or use suitable line gaskets and good
bolting practices with a anged body.
With a weld end body, be sure to remove the
trim package, including the gasket, according
to the Maintenance section before welding
the body into the line. Do not install the trim
package until any post-weld heat treatment is
completed. If heat treating, prevent scale
build-up on all machined guiding and sealing
surfaces inside the body and at the bonnet
ange/body joint.
Note
the valve body.
2. Install a three-valve bypass around the regulator
if continuous operation is necessary during
maintenance or inspection. The pilot may be
eld-changed to the opposite-side mounting
position by swapping the pilot pipe nipple to the
opposite bonnet tapping.
WARNING
!
A regulator may vent some gas to
the atmosphere. In hazardous or
accumulate, and cause personal injury,
explosion. Vent a regulator in hazardous
gas service to a remote, safe location
away from air intakes or any hazardous
location. The vent line or stack opening
must be protected against condensation
or clogging.
3. To keep the pilot spring case vent from being
plugged or the spring case from collecting
moisture, corrosive chemicals, or other foreign
material, point the vent down or otherwise protect
it. To remotely vent the standard pilot, remove the
vent and install obstruction-free tubing or piping
into the 1/4-inch NPT vent tapping. Provide
protection on a remote vent by installing a screened
vent cap into the remote end of the vent pipe.
4. Run a 3/8-inch (9,5 mm) outer diameter or
larger pilot supply line from the upstream pipeline
to the lter inlet as shown in Figure 3. Do not
make the upstream pipeline connection in a
turbulent area, such as near a nipple, swage, or
elbow. If the maximum pilot inlet pressure could
exceed the pilot rating, install a separate reducing
regulator in the pilot supply line. Install a hand
valve in the pilot supply line, and provide vent
valves to properly isolate and relieve the pressure
from the regulator.
5. Attach a 1/2-inch NPT downstream pressure
control line downstream of the regulator in a
straight run of pipe, as shown in Figure 3.
Do not make the tap near any elbow, swage, or
nipple that might cause turbulence. Connect
the other end of the control line to the bonnet
connection. Install a hand valve in the control line
to shutoff the control pressure when the bypass is
in use.
6. If a quick acting solenoid is to be installed
downstream of the regulator, the regulator
and solenoid should be located as far apart
as practical. This maximizes the gas piping
volume between the regulator and solenoid
and improves the regulator response to quick
changing ow rates.
7. Consult the appropriate instruction manual for
installation of an optional Type 662 pneumatic
or electric remote control drive unit. For
optional remote pneumatic loading of a
6350 or 61 Series pilot, make the loading piping
connections to the 1/4-inch NPT vent connection.
Prestartup Considerations
Before beginning the startup procedures in this section,
make sure the following conditions are in effect:
• Block valves isolate the regulator.
• Vent valves are closed.
• Hand valves are closed.
7
Types 1098-EGR and 1098H-EGR
4 MAIN PIPE
DIAMETERS
1/2-INCH (13 mm)
PIPE
PILOT
SUPPLY
LINE
FILTER
VENT
TYPE 1098-EGR OR 1098H-EGR REGULATOR
48A6566-A
B1622
Figure 3. Standard Single-Pilot Installation
WITH STANDARD 6350 SERIES PILOT
CAUTION
Introduce pilot supply pressure into
the regulator before introducing any
downstream pressure, or internal damage
may occur due to reverse pressurization
of the pilot and main valve components.
Always use pressure gauges to monitor downstream
pressure during startup. Procedures used in putting
this regulator into operation must be planned
accordingly if the downstream system is pressurized
by another regulator or by a manual bypass.
Note
For proper operation, pilot supply
pressure must exceed control pressure
the actuator nameplate as minimum
differential pressure.
CONTROL LINE
10 MAIN PIPE DIAMETERS
TO PILOT LIGHT (IF
USED FOR BOILER
FUEL INSTALLATION)
1/2-INCH
(13 mm)
PIPE
compression and pressure setting. Turning the
adjusting screw counterclockwise decreases the spring
compression and pressure setting.
Pilot Adjustment
To adjust standard 6350 Series pilots: loosen the
locknut and turn the adjusting screw. Then tighten
the locknut to maintain the adjustment position. On
a standard Types 6352 through 6354M pilot, a closing
cap must be removed before adjustment and
replaced afterward.
WARNING
!
To avoid possible personal injury from
a pressure-loaded pilot, carefully vent
the spring case before removing the
closing cap. Otherwise, trapped loading
pressure could forcefully eject the freed
closing cap.
The only adjustment necessary on a Type 1098-EGR
or 1098H-EGR regulator is the pressure setting of
the pilot control spring. Turning the adjusting screw
clockwise into the spring case increases the spring
8
To adjust the 61 Series or Type Y600AM pilots:
remove the closing cap and turn the adjusting screw.
Any adjustments made should set the controlled
pressure within the appropriate spring range shown
in the Table 2.
4 MAIN PIPE DIAMETERS
Types 1098-EGR and 1098H-EGR
PILOT
SUPPLY LINE
1/2-INCH
(13 mm)
PIPE
FILTER
TYPE Y600AM
AUXILIARY PILOT
48A6566-A
B1622
VENT
VENT
TYPE 1098-EGR REGULATOR WITH
STANDARD TYPE 6352 WORKING PILOT
Figure 4. Typical Dual-Pilot Boiler Fuel Installation
Startup
1. Slowly open the pilot supply line hand valve.
2. Slowly open the upstream block valve and
partially open the downstream block valve for
minimum ow. Slowly open the hand valve in the
control line.
3. Adjust the pilot setting, if necessary.
4. Completely open the downstream block valve.
5. Slowly close the bypass valve, if any.
Dual-Pilot Boiler Fuel Control
Applications
Boiler Fuel Pressure Control
To enhance proper operation and adequate response
to negative pressure shock condition in low differential
pressure boiler fuel control applications, use the
Type 1098-EGR boiler fuel conguration:
TO PILOT
LIGHT
10 MAIN PIPE DIAMETERS
1/2-INCH
(13 mm)
PIPE
CONTROL
LINE
• Type 1098-EGR with Type 6352 pilot
• Size 70 Actuator
• Quick Opening Cage
• Yellow Main Spring
• Type Y600AM or 627M Auxiliary Pilot mounted in
parallel with the Type 6352 pilot
To provide faster response, two pilots mounted
in parallel sense downstream pressure. To provide
faster response, two pilots mounted in parallel sense
the downstream pressure. The Type 6352 pilot is
the primary controlling pilot and the Type Y600AM
or 627M auxiliary pilot stands by until it senses a
negative pressure shock condition. The auxiliary
pilot opens, allowing additional ow into the actuator,
increasing the stroking speed and providing faster
response. See Figure 5 for schematic. The quick
opening cage allows maximum capacity at shorter
travels to decrease stroking time in opening and
closing directions. The service conditions should not
exceed 20 psig (1,4 bar) maximum inlet pressure and
10 psid (0,69 bar d) maximum differential pressure.
9
Types 1098-EGR and 1098H-EGR
TYPE 1098-EGR SIZE 70
WITH QUICK OPENING CAGE
Modulating solenoid load valves provide
20 PSI (1,4 bar) MAXIMUM
TYPE 6352
WORKING PILOT
one position to the other, effectively
preventing sudden pressure changes in
the system. Alternately, a snap-acting
solenoid valve can be furnished with a
characterized valve plug that, by allowing
maximum capacity to be reached at a
greater proportion of total travel, slows
the action slightly. This action does
not control shock as effectively as
modulating solenoid valves.
Installation
Note
TYPE Y600AM
AUXILIARY PILOT
E0711
Figure 5. Boiler Fuel Conguration
Supply the boiler pilot light gas with the Type 1098-EGR.
The pilot light gas supply line should branch off the
main fuel line downstream of the Type 1098-EGR and
include a separate regulator to control the nal pilot
light gas pressure, if required (see Figure 5). This
allows the Type 1098-EGR to have its main valve plug
just off the seat waiting for the sudden negative shock
created when the boiler solenoid valve is opened to
light the boiler to the low re load. This installation
practice signicantly increases the stroking speed of
the Type 1098-EGR. See Figure 5 for schematic.
1. Perform the Standard Single-Pilot Regulator
Installation section through step 3, making sure
that the regulator is installed with the actuator
below the main valve as shown in Figure 4.
2. Run a 1/2-inch (13 mm) or larger pilot supply
line from the upstream pipeline to the 1/2-inch
NPT supply connection in the pipe tee as shown
in Figure 4. Do not make the connection in a
turbulent area, such as near a nipple, swage, or
elbow. If the maximum pilot inlet pressure could
exceed the pilot rating, install a separate regulator
in the pilot supply line, and provide vent valves so
that pressure can be properly isolated and relieved
from the regulator.
3. Attach a 1/2-inch NPT downstream
pressure control line ten pipe diameters
downstream of the regulator in a straight run
of pipe. Do not make the tap near any elbow,
swage, or nipple, which might cause turbulence.
Table 6. Auxiliary Pilot Selection (Fast Stroke Dual Pilot)
SIZE CONSTRUCTION ORIFICE SPRING RANGES
4 to 8-inches w.c. (10 to 20 mbar) 1B653827052 Red
7 to 16-inches w.c. (17 to 40 mbar) 1B653927022 Olive Drab
15-inches w.c. to 1.2 psi (37 mbar to 0,08 bar) 1B537027052 Yellow
1.2 to 2.5 psi (0,08 to 0,17 bar) 1B537127022 Light Green
2.5 to 4.5 psi (0,17 to 0,31 bar) 1B537227022 Light Blue
4.5 to 7 psi (0,31 to 0,48 bar) 1B537327052 Black
5 to 10 psi (0,35 to 0,69 bar) 10B3076X012 Yellow
3/4-inch
(19 mm)
10
Type Y600AM
Type Y600AM
Type 627M
1/2-inch
(13 mm)
1/2-inch
(13 mm)
1/2-inch
(13 mm)
SPRING
NUMBER
SPRING
COLOR
MINIMUM PRESSURE
AT WHICH AUXILIARY
PILOT CAN BE SET
1-inch w.c. (2 mbar) Under
working pilot setpoint
0.2 psig (0,01 bar) Under
working pilot setpoint
0.3 psig (0,02 bar) Under
working pilot setpoint
Types 1098-EGR and 1098H-EGR
Connect the other end of the control line to the
1/4-inch NPT connection in the control
pipe tee as shown in Figure 4. Install a hand
valve in the control line to shutoff the control
pressure when the bypass is in use. Also use
the hand valve to dampen out pulsations, which
may cause instability or cycling of the regulator.
4. Consult the appropriate instruction manual
for installation of an optional pneumatic or
electric remote control drive unit. For optional
remote pneumatic loading of a 6350 or
61 Series pilot, make the loading piping
connections to the 1/4-inch NPT vent connection.
Startup
1. Slowly open the pilot supply line hand valve.
2. Slowly open the upstream block valve and partially
open the downstream block valve for minimum ow.
3. Slowly open the hand valve in the control line
and make sure that the standby pilot is set
far enough below the working pilot so that
the standby pilot remains closed during normal
operation. For example, with nal desired settings
of 11-inches w.c. (27 mbar) for the working pilot
and 10-inches w.c. (25 mbar) for the standby
pilot, begin by reducing the working pilot setting
far enough below 10-inches w.c. (25 mbar) for
the working pilot to shutoff. Then set the standby
pilot for an outlet pressure of 10-inches w.c.
(25 mbar). Finally, set the working pilot for an
outlet pressure of 11-inches w.c. (27 mbar).
Table 6 shows how close the standby pilot can be
set to the working pilot setting.
4. Completely open the downstream block valve.
5. Slowly close the bypass valve, if any.
SAFTEY SHUTOFF VALVE
GAS
SUPPLY
E0710
TYPE
1098-EGR
PILOT
GAS
SUPPLY
PILOT GAS
REGULATOR
FAST-ACTING
LOAD VALVE
TO PILOT LIGHT
TO BOILER
Figure 6. Boiler Fuel Conguration Installation Guide
Working Monitor (Figure 7)
Installation
1. For both working monitor regulator and
working regulator, perform the Standard Single Pilot Regulator Installation section through step 6.
2. Connect another downstream pressure control
line and hand valve (Figure 7) to the monitoring
pilot according to the monitoring pilot instruction
manual. Attach a 1/2-inch NPT pressure control
line and hand valve from the intermediate
pressure pipeline to the working monitor regulator.
Pipe supply pressure between the monitoring pilot
and the working monitor regulator according to the
monitoring pilot manual.
For two typical monitoring pilots, Table 7 gives
the spread between normal distribution pressure
and the minimum pressure at which the working
monitor regulator can be set to take over if the
working regulator fails to open.
Construction Spring Range Spring Part Number
Type 161AYW and 150 psig (10,3 bar)
maximum allowable pilot inlet
Type 627-109 and 150 psig
(10,3 bar) maximum allowable pilot
inlet for cast iron body or 750 psig
(51,7 bar) maximum allowable pilot
inlet for malleable iron or steel body
Table 7. Working Monitor Performance
MONITORING PILOT INFORMATION
3 to 12-inches w.c.
11 to 25-inches w.c.
0.9 to 2.5 psi
2.5 to 4.5 psi
4.5 to 7.0 psi
5 to 20 psig
15 to 40 psig
35 to 80 psig
70 to 150 psig
130 to 200 psig
(7 to 30 mbar)
(27 to 62 mbar)
(0,06 to 0,17 bar)
(0,17 to 0,31 bar)
(0,31 to 0,48 bar)
(0,34 to 1,38 bar)
(1,0 to 2,8 bar)
(2,4 to 5,5 bar)
(4,8 to 10,3 bar)
(9,0 to 13,8 bar)
Startup
1B653927022
1B537027052
1B537127022
1B537227022
1B537327052
10B3076X012
10B3077X012
10B3078X012
10B3079X012
10B3079X012
MINIMUM PRESSURE AT WHICH
WORKING MONITOR
REGULATOR CAN BE SET
3-inches w.c. (7 mbar) over normal
distribution pressure
0.5 psig (0,03 bar) over normal
distribution pressure
3.0 psig (0,21 bar) over normal
distribution pressure
5.0 psig (0,34 bar) over normal
distribution pressure
11
Types 1098-EGR and 1098H-EGR
UPSTREAM
VENT VALVE
UPSTREAM
BLOCK VALVE
HAND VALVE
26A4298-A
A2118-2
PRESSURE
TYPE 161AYW OR 627-109
MONITORING PILOT
HAND
VALVE
TYPE 1098-EGR
OR 1098H-EGR
WORKING
MONITOR
REGULATOR
WORKING MONITOR
Figure 7. Typical Working Monitor Installation
On a working monitor installation (Figure 7), be sure
that the second-stage working regulator is set to
operate at a pressure lower than the Type 1098-EGR
or 1098H-EGR working monitor regulator. To do this,
increase the setting of the monitoring pilot until the
working pilot is in control of the intermediate pressure
and the second-stage working regulator is in control
of the downstream pressure. If this is not done,
the monitoring pilot tries to take control of the
downstream pressure.
1. Slowly open the upstream block valve and
the hand valves in both pilot supply lines. This
energizes both pilots so that their setpoints can
be adjusted. Partially open the downstream block
valve for minimum ow.
VENT VALVE
HAND VALVE
DOWNSTREAM
INTERMEDIATE
PRESSURE
VENT
VALVE
DOWNSTREAM
PRESSURE
STANDARD 6350 SERIES PILOT FOR
TYPE 1098-EGR OR 1098H-EGR REGULATOR
BLOCK VALVE
HAND VALVE
SECOND STAGE
REGULATOR
VENT VALVE
should exceed the desired downstream pressure
by at least the amount listed in Table 7. The steps
followed to set the monitoring pilot may vary with
each piping situation; however, the basic method
remains the same. The following sub steps a
and b may be used as examples for setting the
monitoring pilot:
a. Increase the outlet pressure setting of the
second-stage working regulator until the
monitoring pilot takes control of the downstream
pressure. Adjust the monitoring pilot setting
until the desired emergency downstream
pressure is achieved. Then, readjust the second-
stage working regulator to establish the desired
downstream pressure.
2. To enable intermediate pressure adjustment with
the working monitor regulator, slowly open the
hand valve in the intermediate pressure control line.
3. To enable downstream pressure adjustment with
the second-stage working regulator, slowly open
the hand valve in the control line to this regulator.
4. Adjust the setting of the monitoring pilot to
establish the desired emergency downstream
pressure, which is to be maintained in the event
of open failure of the second-stage working
regulator. The emergency downstream pressure
12
b. Install special piping (not shown in
Figure 7) so that the monitoring pilot senses
the intermediate pressure. The intermediate
pressure then appears to the monitoring pilot as
if it were increased downstream pressure,
and the monitoring pilot controls and reduces
the intermediate pressure. Adjust the monitoring
pilot setting until the desired emergency
downstream pressure is achieved at the
intermediate pressure stage. Then slowly
close the special piping, and open up the
monitoring downstream control line for
normal service.
Types 1098-EGR and 1098H-EGR
16A4296-A 16A4297-A
FLEXIBLE WIDE-OPEN MONITOR ARRANGEMENT THAT PERMITS
WIDE-OPEN MONITOR TO BE EITHER UPSTREAM OR DOWNSTREAM
PILOT SUPPLY REGULATOR
Figure 8. Typical Wide-Open Monitor Installations
5. Slowly open the downstream block valve.
6. Slowly close the bypass valve, if any.
NOTICE
Adjustment Recommendations for
Monitor Applications
Low amplitude/high frequency monitor trim oscillations
can occur if the monitor regulator pressure setting is
adjusted too closely to the working regulator pressure
setting and/or if the monitor pilot supply regulator
pressure setting is adjusted too closely to the monitor
regulator pressure setting. The monitor pressure
setting should be adjusted so it is at minimum 2
times the pilot proportional band pressure above the
working regulator pressure setting. The monitor pilot
supply pressure setting should be adjusted so it is at
minimum 5 psig (0,34 bar) plus the monitor minimum
differential pressure above the working regulator
pressure setting. These adjustments must be made
such that other governing pressure limits, such as
casing ratings, pilot maximum differential pressures, or
regulatory limits, are not exceeded.
MINIMUM PIPING WIDE-OPEN MONITOR ARRANGEMENT THAT
REQUIRES WIDE-OPEN MONITOR ALWAYS TO BE UPSTREAM
Wide-Open Monitor (Figure 8)
Installation
1. For both the wide-open monitoring regulator and
the working regulator, perform the Standard
Single-Pilot Regulator Installation section
through step 6.
2. Connect the control line of the wide-open
monitoring regulator (Figure 8) to downstream
piping near the working regulator control line
connection. During normal operation the wide-
open monitoring regulator stands wide-open
with the pressure reduction being taken across
the working regulator. Only in case of working
regulator failure does the wide-open monitoring
regulator take control at its slightly higher setting.
Startup
Repeat this procedure in turn for each regulator in
the installation.
1. Slowly open the pilot supply line hand valve.
2. Slowly open the upstream block valve and
partially open the downstream block valve for
minimum ow.
13
Types 1098-EGR and 1098H-EGR
BODY FLANGE
SEAT RING
SCREWS INTO CAGE
W3012-1*
Figure 9. Trim Package Removal
CAGE SCREWS INTO
BODY FLANGE
3. Slowly open the hand valve in the control line
and adjust the pilot setting if necessary. Set
the monitoring regulator at a slightly higher control
pressure than the working regulator.
4. Completely open the downstream block valve.
5. Slowly close the bypass valve, if any.
Shutdown
Installation arrangements vary, but in any installation it
is important that the valves be opened or closed slowly
and that the outlet pressure be vented before venting
inlet pressure to prevent damage caused by reverse
pressurization of the pilot or main valve. The following
steps apply to the typical installation as indicated.
Single-Pilot, Dual-Pilot Regulator, or
Wide-Open Monitor
As well as applying to a single-pilot regulator (Figure 3),
the steps in this procedure also are valid for a dual-
pilot regulator (Figure 4), or a wide-open monitoring
installation (Figure 8) and just need to be repeated for
each regulator in such an installation.
1. Slowly close the downstream block valve. If the
control line is downstream of the block valve, also
close the hand valve in the control line.
2. Slowly close the upstream block valve and the
hand valve in the pilot supply line.
W2772-1
Figure 10. Seat Ring/Cage Removal or Installation
Using Body as Holding Fixture
3. Slowly open the vent valve in the downstream
pipeline. If the control line is downstream of the
block valve, also open the vent valve in the control
line. Permit all pressure to bleed out.
4. Slowly open the upstream pipeline vent valve.
Allow all pressure to bleed out of both the piping
and the pilot.
Working Monitor
1. Slowly close the downstream block valve and the
hand valve in the downstream pressure control line.
2. Slowly close the upstream block valve and the
hand valves in both pilot supply lines.
3. Slowly open all vent valves and permit all pressures
to bleed out of the piping and regulators.
Maintenance
Regulator parts are subject to normal wear and must be
inspected and replaced as necessary. The frequency
of inspection and replacement of parts depends upon
the severity of service conditions or the requirements
of local, state, and federal regulations. Due to the care
Fisher® takes in meeting all manufacturing requirements
(heat treating, dimensional tolerances, etc.), use only
replacement parts manufactured or furnished by Fisher.
The stem O-rings on the Type 1098 or 1098H actuator
can be lubricated annually, using the grease tting
(key 28, Figure 14). Stem O-rings can be checked
14
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