Fisher 589 Instruction Manual
Instruction Manual
Form 589
February 2016
Type 99 Pressure Reducing Regulator
WARNING
!
Since a pilot-operated regulator is
constructed of both a pilot and a main
valve, care should be used not to exceed
the maximum inlet pressure shown on
the nameplate of either unit. When inlet
pressure exceeds the pilot limitation, a
pilot supply reducing regulator and/or
relief valve is required.
Type 99
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. 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.
W2676
Figure 1. Type 99 Regulator with Type 61H (High Pressure) Pilot
Introduction
Scope of the Manual
This manual describes and provides instructions for
installation, startup, adjustment and parts ordering
information of Type 99 pressure reducing regulator
complete with standard P590 Series integral lter.
Information on other equipment used with this
regulator can be found in separate manuals.
www.fisherregulators.com
D100260X012
Type 99
Specications
Specications and ratings for various Type 99 constructions are listed in the Specications section below. Some
specications for a given regulator as it originally comes from the factory are stamped on the nameplates located on
the pilot and actuator spring cases. An additional nameplate may be installed on the pilot to indicate a regulator with
O-ring stem seal. These regulators and their installations should be checked for compliance with applicable codes.
Available Constructions
Type 99L - Type 99 with Type 61L pilot which
has 2 in. w.c. to 20 psig / 5 mbar to 1.4 bar
pressure range
Type 99LD - Type 99 with Type 61LD pilot
which has a narrower proportional band than the
standard Type 61L pilot
Type 99LE - Type 99 with Type 61LE pilot which
has a broader proportional band than the standard
Type 61L pilot
Type 99H - Type 99 with Type 61H pilot which has
10 to 65 psig / 0.69 to 4.5 bar pressure range
Type 99HP - Type 99 with Type 61HP pilot has
35 to 100 psig / 2.4 to 6.9 bar pressure range
Body Size and End Connection Styles
NPS 2 / DN 50 body with NPT, CL125 FF, CL150 RF,
CL250 RF and CL300 RF end connections
Maximum Allowable Inlet Pressure
(1)
160 psig / 11.0 bar: Type 61LD pilot
400 psig / 27.6 bar: Type 61L, 61LE or 61H pilots
1000 psig / 69.0 bar: Type 61HP pilot, along with
Type 1301F pilot supply regulator and Type H110
relief valve (1/2 in. / 13 mm orice only)
Outlet (Control) Pressure Ranges
(1)
See Table 1
Approximate Proportional Bands
See Table 2
Maximum Allowable Pressure Drop
(1)
See Table 3
Maximum Actuator Pressures
(1)
Operating: 100 psig / 6.9 bar
Emergency: 110 psig / 7.6 bar
Maximum Pilot Spring Case Pressure for
Pressure Loading
(1)(2)
Types 61L, 61LD and 61LE: 50 psi / 3.4 bar
with special steel closing cap
Types 61H and 61HP: 100 psi / 6.9 bar
Minimum Dierential Pressure Required for
Full Stroke
See Table 3
Maximum Rated Travel
1/4 in. / 6.4 mm
Temperature Capabilities
(1)
With Nitrile (NBR) / Neoprene (CR) / Nylon (PA):
-20 to 180°F / -29 to 82°C
With Fluorocarbon (FKM):
0 to 300°F / -18 to 149°C
1. The pressure/temperature limits in this Instruction Manual and any applicable standard or code limitation should not be exceeded.
2. For stability or overpressure protection, a pilot supply regulator may be installed in the pilot supply tubing between the main valve and pilot.
Description
The Type 99 gas regulator provides a broad capacity
for controlled pressure ranges and capacities
in a wide variety of distribution, industrial and
commercial applications.
A Type 99 regulator has a Type 61L, 61LE or 61LD
(low pressure); Type 61H (high pressure); or Type 61HP
(extra high pressure) pilot integrally mounted to the
actuator casing as shown in Figure 1. The Type 99
regulator can handle up to 1000 psig / 69.0 bar inlet
2
pressure (the 1000 psig / 69.0 bar regulator requires
a Type 1301F pilot supply regulator and a Type H110
pop relief valve). The pilot supply regulator reduces
inlet pressure to a usable 200 psig / 14 bar for the
extra high-pressure pilot. The standard Type 99
regulator comes with O-ring seals on the guide
bushing and valve carrier to keep main valve body
outlet pressure from interfering with outlet pressure in
the lower casing assembly.
Type 99
MAIN VALVE
SPRING
MAIN
DIAPHRAGM
PUSHER POST
ASSEMBLY
PILOT DIAPHRAGM
ASSEMBLY
A6814
INLET PRESSURE
OUTLET PRESSURE
ATMOSPHERIC PRESSURE
LOADING PRESSURE
OUTLET PIPE
INLET
PILOT DIAPHRAGM
PILOT CONTROL SPRING
Figure 2. Schematic of Type 99 Regulator with Type 61L (Low Pressure) Pilot
BLEED VALVE
BLEED
ORIFICE
PILOT
ORIFICE
Principle of Operation
The key to the operation of a Type 99 regulator is the
yoked double-diaphragm pilot. Fast response and
accuracy are made possible by the amplifying effect
of the pressure-balanced pilot and by the two-path
control system. The function of the pilot is to sense
change in the controlled pressure and amplify it into a
larger change in the loading pressure. Any changes
in outlet pressure act quickly on both the actuator
diaphragm and the loading pilot, thus providing the
precise pressure control that is a characteristic of a
two-path system.
A typical pilot has an approximate gain of 20, which
means the outlet pressure needs to droop only 1/20
as much as a direct-operated regulator in order to
obtain the same pressure differences across the main
diaphragm. Advantages of a pilot-operated regulator are
high accuracy and high capacity.
Upstream or inlet pressure is utilized as the operating
medium, which is reduced through pilot operation to
load the main diaphragm chamber. Tubing connects
the inlet pressure to the pilot through a lter assembly.
Downstream or outlet pressure registers underneath the
main diaphragm through the downstream control line.
In operation, assume the outlet pressure is less than
the setting of the pilot control spring. The top side
of the pilot diaphragm assembly will have a lower
pressure than the setting of the spring. Spring forces
the diaphragm head assembly upward, opening the
relay or inlet orice. Additional loading pressure is
supplied to the pilot body and to the top side of the
main diaphragm.
This creates a higher pressure on the top side of the
main diaphragm than on the bottom side, forcing the
diaphragm downward. This motion is transmitted
through a lever, which pulls the valve disk open,
allowing more gas to ow through the valve.
When the gas demand in the downstream system
has been satised, the outlet pressure increases.
The increased pressure is transmitted through the
downstream control line and acts on top of the pilot
diaphragm head assembly. This pressure exceeds
the pilot spring setting and forces the head assembly
down, closing the orice. The loading pressure acting
on the main diaphragm bleeds to the downstream
system through a small slot between the pilot bleed
valve and the bleed orice.
3
Type 99
DOWNSTREAM
CONTROL LINE
MAIN DIAPHRAGM
PUSHER POST
ASSEMBLY
54A2767-a
A2505
INLET PRESSURE
OUTLET PRESSURE
ATMOSPHERIC PRESSURE
LOADING PRESSURE
MAIN VALVE
SPRING
BLEED
ORIFICE
BLEED
VALV E
RELIEF
VALV E
BODY
YOKE
CAP
YOKE
LEG
INLET
PRESSURE
TUBING
PILOT DIAPHRAGM
FLANGE
ADAPTOR
CONNECTION
PILOT SPRING
YOKE
CAP
Figure 3. Schematic of Type 99 Regulator with Type 61HP (Extra High Pressure) Pilot
RELIEF
VALV E
CAP
DIAPHRAGM
RELAY
VALV E
ORIFICE
Table 1. Outlet Pressure Ranges
PILOT
TYPE
MAXIMUM PILOT
SUPPLY PRESSURE
psig bar psig bar In. mm In. mm
61L 400 27.6
61LD 160 11.0
61LE 400 27.6
OUTLET (CONTROL)
PRESSURE RANGE
2 to 4 in. w.c.
3 to 12 in. w.c.
0.25 to 2
1 to 5
2 to 10
5 to 15
10 to 20
(1)
(1)
5 to 10 mbar
7 to 30 mbar
0.02 to 0.14
0.07 to 0.35
0.14 to 0.69
0.35 to 1.0
0.69 to 1.4
Part Number Color Code
(1)
1B558527052
(1)
1C680627222
1B886327022
1J857827022
1B886427022
1J857927142
1B886527022
61H 400 27.6 10 to 65 0.69 to 4.5 0Y066427022 Green stripe 0.36 9.22 6.00 152
61HP 600 41.4 35 to 100 2.4 to 6.9 1D387227022 Blue 0.20 5.08 1.69 42.9
1. Type 61LD pilot only.
PILOT CONTROL SPRING
Wire Diameter Free Length
Orange
Unpainted
Red
Yellow
Blue
Brown
Green
0.07
0.08
0.11
0.14
0.17
0.19
0.21
1.83
2.03
2.77
3.61
4.37
4.75
5.26
3.78
3.00
2.75
2.75
2.88
3.03
3.13
Table 2. Proportional Bands
PILOT CONTROL SPRING
PILOT TYPE
61LD
Part Number Color Code
1B558527052
1C680627222
Orange
Unpainted
Wire Diameter Free Length
In. mm In. mm In. w.c. mbar
0.075
0.080
1.91
2.03
4.13
3.25
105
82.6
61L 1B886327022 Red 0.109 2.77 2.75 69.9 1.0 to 2.0 2 to 5
61LD 1B886327022 Red 0.109 2.77 2.75 69.9 0.3 to 1.0 0.62 to 2
61LE 1B886327022 Red 0.109 2.77 2.75 69.9 5.0 to 8.0 12 to 20
61L, 61LD and 61LE
1J857827022
1B886427022
1J857927142
1B886527022
Yellow
Blue
Brown
Green
0.142
0.172
0.187
0.207
3.61
4.37
4.75
5.26
2.75
2.88
2.88
3.13
69.9
73.2
73.2
79.5
61H 0Y066427022 Green stripe 0.363 9.22 6.00 152 0.1 to 0.3 psi 0.01 to 0.02 bar
61HP 1D387227022 Blue 0.200 5.08 1.69 42.9 1.0 to 2.0 psi 0.07 to 0.14 bar
PROPORTIONAL BAND
0.1 to 0.5 0.25 to 1
0.1 to 0.3 psi 0.01 to 0.02 bar
96.0
76.2
69.9
69.9
73.2
77.0
79.5
4
TYPE 161AYW MONITORING
PILOT (ALSO REPRESENTATIVE
OF TY PE 627-109)
PILOT SUPPLY LINE
WORKING
MONITOR PILOT
DISTRIBUTION PRESSURE
CONTROL LINE
INTERMEDIATE PRESSURE
CONTROL LINE
Type 99
20A1389-A
B2484
10A1386-A
A2503
UPSTREAM
PRESSURE
LOADING
PRESSURE
OPTIONAL
PILOT SUPPLY
REGULATOR
INTERMEDIATE
PRESSURE
WORKING
MONITOR
REGULATOR
PILOT SUPPLY PIPING FOR WORKING REGULATOR WHEN PILOT IS
REQUIRED TO BE SUPPLIED FROM UPSTREAM PRESSURE
OPTIONAL
PILOT SUPPLY
REGULATOR
Figure 4. Working Monitor Installation
UPSTREAM
REGULATOR
(REQUIRES O-RING
STEM SEAL)
OPTIONAL PILOT
SUPPLY REGULATOR
FLEXIBLE ARRANGEMENT THAT PERMITS WIDE-OPEN MONITOR TO BE EITHER UPSTREAM OR DOWNSTREAM
WORKING
REGULATOR
WORKING
REGULATOR
DISTRIBUTION
PRESSURE
10A1388-A
A2504
UPSTREAM
REGULATOR
(REQUIRES O-RING
STEM SEAL)
OPTIONAL PILOT
SUPPLY REGULATOR
MINIMUM PIPING ARRANGEMENT THAT REQUIRES WIDE-OPEN MONITOR TO ALWAYS BE UPSTREAM
Figure 5. Typical Wide-Open Monitor Installations
5
Type 99
Table 3. Maximum Allowable Pressure Drop and Minimum Differential Pressures
MAXIMUM
ALLOWABLE
PRESSURE DROP
psig bar In. mm In. mm psig bar In. mm
25 1.7 1C277127022 0.148 3.76 6.00 152 0.75 0.05 Nitrile (NBR), Fluorocarbon (FKM) 1-1/8 29
50 3.4 1N801927022 0.156 3.96 7.13 181 1.50 0.10 Neoprene (CR), Fluorocarbon (FKM) 1-1/8 29
150 10.3 1B883327022 0.187 4.75 6.63 168 3.00 0.21
(2)
175
250 17.2 1B883327022 0.187 4.75 6.63 168 3.00 0.21
300 20.7 0W019127022 0.281 7.22 6.00 152 10.0 0.69 Nylon (PA) 1-1/8
400 27.6 0W019127022 0.281 7.22 6.00 152 10.0 0.69 Nylon (PA) 7/8 22
1000 69.0 0W019127022 0.281 7.22 6.00 152 10.0 0.69 Nylon (PA) 1/2
1. Can use all orice sizes up to maximum size listed. See Table 4.
2. CL125 FF anged body only.
3. 1-1/8 in. / 29 mm is the only orice available for 300 psig / 20.7 bar maximum inlet pressure regulator.
4. 1/2 in. / 13 mm is the only orice available for 1000 psig / 69.0 bar maximum inlet pressure regulator.
5. O-ring seat construction is only available for 7/8 and 1-1/8 in. / 22 and 29 mm orice sizes.
1. 1/2 in. / 13 mm is the only orice size available for 1000 psig / 69.0 bar maximum inlet pressure regulator.
2. Maximum inlet rating is equivalent to the 7/8 in. / 22 mm orice.
12.1
(2)
1B883327022 0.187 4.75 6.63 168 3.00 0.21
Composition or Nylon (PA) disk seat only
Composition or Nylon (PA) disk seat only
MAIN VALVE SPRING MINIMUM
Part
Number
Wire Diameter Free Length
Table 4. Orifice Sizes
TRIM CONSTRUCTION
Restricted capacity trim,
Straight bore —
(2)
Restricted capacity trim
Stepped bore —
Full capacity trim,
Composition or Nylon (PA) disk
or O-ring seat
,
DIFFERENTIAL
PRESSURE FOR FULL
STROKE
DISK MATERIAL
Nitrile (NBR), Neoprene (CR),
Fluorocarbon (FKM)
Nitrile (NBR), Neoprene (CR),
Fluorocarbon (FKM)
Nitrile (NBR), Neoprene (CR),
Fluorocarbon (FKM)
ORIFICE SIZE
In. mm
(1)
1/2
3/4
7/8 x 3/8
7/8 x 1/2
7/8 x 5/8
7/8
1-1/8
ORIFICE SIZE
1-1/8 29
(1)
13
19
22 x 10
22 x 13
22 x 16
22
29
MAXIMUM
7/8 22
7/8 22
(3)
(4)
(1)(5)
(3)
29
(4)
13
Normally, excess loading pressure slowly escapes
downstream around the bleed valve (Figure 2)
or through the relief valve body (Figure 3). Since
loading pressure needs to exceed outlet pressure
only moderately to stroke the main valve fully open,
a continued increase in loading pressure differential
extends the main diaphragm and the pusher post
assembly far enough to separate the bleed valve and
the bleed orice. This action permits quick dumping of
excess loading pressure into the downstream system.
With a decrease in loading pressure on top of the main
diaphragm, the main spring exerts an upward force on
the diaphragm rod connected to the main diaphragm,
pulling it in an upward direction. This moves the main
valve towards the seat, decreasing the ow to the
downstream system.
6
The pilot valve diaphragm acts as a sealing member
for the loading chamber and as a balancing member
to the upper pilot diaphragm. These two diaphragms
are connected by a yoke so any pressure change in
the pilot chamber has little effect on the position of the
pilot valve. Therefore, the active diaphragm in the pilot
is the upper pilot diaphragm and the pressure on the
top side of this diaphragm opposes the force of the
pilot control spring.
Monitoring Systems
Monitoring regulators serve as overpressure protection
devices to limit system pressure in the event of an
open failure of a working regulator feeding the system.
Two methods of using Type 99 regulators in monitoring
applications are:
Construction
Type 161AYW with
1/8 in. / 3.2 mm orice size and
150 psig / 10.3 bar maximum
allowable inlet pressure
3/4 NPT Type 627-109 with
1/8 in. / 3.2 mm orice size and
1000 psig / 69.0 bar maximum
inlet pressure / body rating
for ductile iron body
Table 5. Working Monitor Performance
MONITORING PILOT INFORMATION
Spring Range
psig bar In. mm In. mm
3 to 12 in. w.c.
11 to 25 in. w.c.
0.9 to 2.5
2.5 to 4.5
4.5 to 7
5 to 20
15 to 40
35 to 80
70 to 150
7 to 30 mbar
27 to 62 mbar
0.06 to 0.17
0.17 to 0.31
0.31 to 0.48
0.34 to 1.4
1.0 to 2.8
2.1 to 5.5
4.8 to 10.3
Part Number
1B653927022
1B537027052
1B537127022
1B537227022
1B537327052
10B3076X012
10B3077X012
10B3078X012
10B3079X012
Pilot Spring
Wire Diameter Free Length
0.105
0.114
0.156
0.187
0.218
0.170
0.207
0.262
0.313
2.67
2.90
3.96
4.75
5.54
4.32
5.26
6.65
7.95
3.750
4.312
4.060
3.937
3.980
3.190
3.190
3.200
3.070
Type 99
MINIMUM PRESSURE
AT WHICH WORKING
MONITOR REGULATOR
CAN BE SET
95.2
109
103
100
101
81.0
81.0
81.3
78.0
3 in. w.c. / 7 mbar
distribution pressure
0.5 psi / 0.03 bar
distribution pressure
3.0 psi / 0.21 bar
distribution pressure
5.0 psi / 0.34 bar
distribution pressure
over normal
over normal
over normal
over normal
Working Monitor
On a working monitor installation (Figure 4), the
control line of the monitoring pilot is connected
downstream of the working regulator. During
normal operation, distribution pressure causes
the monitoring pilot to stand wide open. Full pilot
supply pressure enters the working monitor pilot and
permits the working monitor regulator to control at its
intermediate pressure setting.
Open failure of the working regulator increases
distribution pressure as the working regulator goes
wide open. Intermediate pressure is then ignored by
the monitoring regulator, which controls downstream
pressure at its own pressure setting (slightly higher
than the normal control pressure).
The monitoring pilot should be upstream of the working
monitor regulator. This enables a closer setpoint
between the working regulator and the monitoring
pilot. Special Types 161AYW and 627-109 monitoring
pilots with quick-bleed operation have been designed
to give faster response to abnormal downstream
conditions. Table 5 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 open.
Wide-Open Monitor
The control line of the upstream regulator is
connected downstream of the second regulator
(Figure 5), so that during normal operation the
monitoring regulator is standing wide open with the
reduction to distribution pressure being taken across
the working regulator. Only in case of open failure of
the working regulator does the wide-open monitoring
regulator take control at its slightly higher setting.
The upstream regulator must have an O-ring seal
on the valve carrier assembly. This seals off the leak
path that otherwise would let line pressure ahead of
the working regulator inlet try to close the wide-open
monitoring regulator.
Installation
WARNING
!
Personal injury, equipment damage or
leakage due to escaping gas or bursting
of pressure containing parts might result
if this regulator is overpressured or is
installed where service conditions could
exceed the limits for which the regulator
was designed 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 those limits.
A regulator may vent some gas to
the atmosphere in hazardous or
ammable gas service, vented gas might
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
location. The vent line or stack opening
must be protected against condensation
or clogging.
7
Type 99
Clean out all pipelines before installation and check
to be sure the regulator has not been damaged or
collected foreign material during shipping.
Apply pipe compound to the external pipe threads
only with a threaded body or use suitable line gaskets
and good bolting practices with a anged body. This
regulator may be installed in any position desired as
long as the ow through the body is in the direction
indicated by the arrow on the body. Install a three-valve
bypass around the regulator if continuous operation is
necessary during maintenance or inspection.
Although the standard orientation of the actuator and
pilot to the main valve body is as shown in Figure 1, this
orientation may be changed as far as the inlet tubing
(key 24, Figure 9 or 17) will permit by loosening the
union nut (key 14, Figure 9), rotating the actuator lower
casing (key 29, Figure 9) as desired and tightening
the union nut. To keep the pilot spring case from being
plugged or the spring case from collecting moisture,
corrosive chemicals or other foreign material, the vent
must be pointed down, oriented to the lowest possible
point on the spring case or otherwise protected. Vent
orientation may be changed by rotating the spring case
with respect to the pilot body.
To remotely vent a low-pressure pilot, install the vent
line in place of the pressed-in vent assembly (key 60,
Figure 9). Install obstruction-free tubing or piping into
the 1/4 in. / 6.4 mm vent tapping. Provide protection
on a remote vent by installing a screened vent cap into
the remote end of the vent pipe.
To remotely vent a high-pressure pilot, remove the
threaded-in vent assembly (key 72, Figure 12)
from the high-pressure pilot spring case and install
obstruction-free tubing or piping into the 1/4 in. /
6.4 mm vent tapping. Provide protection on a remote
vent by installing a screened vent cap into the remote
end of the vent pipe.
An upstream pilot supply line is not required
because of the integral pilot supply tubing (key 24,
Figure 9 or 17). However, as long as the 1/4 NPT
tapping in the main valve body is plugged, this
tubing may be disconnected from both the main
valve and lter assembly (key 75, Figures 9 and 16)
in order to install a pilot supply line from a desired
remote location into the lter.
If the maximum pilot inlet pressure will be exceeded
by main valve pressure, install a separate pressure
reducing regulator (if not already provided) in the pilot
supply line.
A Type 99 regulator has two 1/2 NPT control line
pressure taps on opposite sides of the lower casing
(key 29, Figure 9). The regulator normally comes from
the factory with the tap closest to the regulator outlet left
unplugged for the downstream control line as shown in
Figure 1 and with opposite tap plugged.
Attach the control line from the unplugged tap 2 to
3 ft / 0.61 to 0.91 meter downstream of the regulator
in a straight run of pipe. If impossible to comply with
this recommendation due to the pipe arrangement, it
may be better to make the control line tap nearer the
regulator outlet rather than downstream of a block
valve. Do not install the tap near any elbow, swage or
nipple which might cause turbulence.
In many instances, it will be necessary to enlarge the
downstream piping to keep ow velocities within good
engineering practices. Expand the piping as close to
the regulator outlet as possible.
WARNING
!
Adjustment of the pilot control spring to
produce an outlet pressure higher than
the upper limit of the outlet pressure
range for that particular spring can cause
personal injury or equipment damage
due to bursting of pressure-containing
parts. Dangerous accumulation of gases
may also cause bursting if the maximum
actuator emergency casing pressure in
the Specications section is exceeded. If
the desired outlet pressure is not within
the range of the pilot control spring,
install a spring of the proper range
according to the Maintenance section.
Each regulator is factory-set for the pressure setting
specied on the order. If no setting was specied, outlet
pressure was factory-set at the midrange of the pilot
control spring. In all cases, check the control spring
setting to make sure it is correct for the application.
Overpressure Protection
The Type 99 regulator has an outlet pressure
rating lower than its inlet pressure rating. Complete
downstream overpressure protection is required if
the actual inlet pressure can exceed the regulator
outlet pressure rating or the pressure ratings of any
downstream equipment. Although the Type H110
relief valve provides sufcient relief capacity to protect
8
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