Failure to follow these instructions or
to properly install and maintain this
equipment could result in an explosion
and/or re causing property damage and
personal injury or death.
Fisher® regulators must be installed,
operated and maintained in accordance
with federal, state and local codes, rules
and regulations and Emerson Process
Management Regulator Technologies, Inc.
(Regulator Technologies) instructions.
If the regulator vents gas or a leak
develops in the system, service to the unit
may be required. Failure to correct trouble
could result in a hazardous condition.
Call a gas service person to service the
unit. Only a qualied person must install
or service the regulator.
Introduction
Scope of the Manual
This Instruction Manual provides installation, adjustment
and maintenance instructions and parts ordering
information for the 299H Series regulators. Complete
instructions and parts list for the 67C Series ltered pilot
supply regulator and other Fisher equipment are found
in separate instruction manuals.
Description
The 299H Series pressure reducing regulators provide
a broad capacity of controlled pressure ranges and
capacities in a wide variety of distribution, industrial
and commercial applications. A 299H Series regulator
has a pilot integrally mounted to the actuator casing.
The 299H Series regulators can handle inlet pressures
up to 175 psi / 12.1 bar depending on orice size.
W7513
Figure 1. 299H Series Pressure Reducing Regulator
The integral token relief on the Types 299HR and
299HSR regulators is located in the pilot and opens
to relieve minor overpressure.
The Type 299HS provides overpressure or overpressure
and underpressure protection by completely shutting off
the ow of gas to the downstream system. It comes with
a Type VSX-2 slam-shut device which can be congured
for Ovepressure Shutoff (OPSO) or Overpressure and
Underpressure Shutoff (OPSO/UPSO). The slam-shut
device’s actions are independent of the main valve and
of variations to the inlet pressure. The Type VSX-2
slam-shut device has internal or external registration.
External registration requires a downstream sensing line.
www.sherregulators.com
D102684X012
299H Series
Specications
Specications for 299H Series constructions are given below. Some specications for a given regulator as it
originally comes from the factory are stamped on a nameplate located on the actuator upper casing.
Available Constructions
Type 299H: Pilot-operated pressure reducing
Minimum and Maximum Trip Pressure Ranges
See Table 3
regulator with a pilot integrally mounted to the
actuator casing.
Type 299HR: A Type 299H with a token internal
relief valve to relieve minor overpressure caused
by thermal expansion.
Type 299HS: Same as the Type 299H with a
Type VSX-2 slam-shut valve which provides
overpressure or overpressure and
Type VSX-2 Sensing Line Connection
1/4 NPT
Pressure Control Accuracy (Fixed Factor)(PFM)
(3)
±1%
of absolute control pressure
Minimum Differential Pressure For Full Stroke
1.5 psid / 0.10 bar d
underpressure protection.
Type 299HSR: Same as the Type 299HS with an
internal token relief valve.
Body Size and End Connection Styles
See Table 1
Maximum Operating Inlet Pressure by Orice Size
1/4 x 3/8-inch / 6.4 x 9.5 mm .......... 175 psig / 12.1 bar
3/8 inch / 9.5 mm .......................... 175 psig / 12.1 bar
1/2 inch / 13 mm ........................... 175 psig / 12.1 bar
3/4 inch / 19 mm ........................... 150 psig / 10.3 bar
7/8 inch / 22 mm
1 inch / 25 mm
1-3/16 inches / 30 mm
(5)
........................... 125 psig / 8.6 bar
(5)
.................................100 psig / 6.9 bar
(5)
................... 80 psig / 5.5 bar
Maximum Casing and Emergency Outlet Pressure
66 psig / 4.5 bar
Outlet (Control) Pressure Ranges
(1)(2)
See Table 2
Maximum Set Pressure for Type 299HS
(1)
16 psig / 1.1 bar
Maximum Set Pressure for Slam-Shut Device
(1)
(1)
(1)
Control Line Connections
3/4 NPT
Temperature Capabilities
-20 to 150°F / -29 to 66°C
Approximate Weight
21 pounds / 10 kg
Pressure Registration
Internal, External or Dual Registration
See Figure 2
Fixed Restriction Sizes
0.044 inch / 1.1 mm, Red (standard gain)
0.071 inch / 1.8 mm, Green (low gain)
0.082 inch / 2.1 mm, Blue (lower gain)
Options
• Filter
(3)
: A P590 Series lter installed in the pilot
supply tubing between main body and pilot
• Filtered pilot supply regulator
supply regulator with integral 5 micron
Polyethylene lter
23 psig / 1.6 bar
1. The pressure/temperature limits in this Instruction Manual and any applicable standard or code limitation should not be exceeded.
2. For optimum performance, a pilot supply regulator may be installed in the pilot supply tubing between the main valve and pilot.
3. A pilot supply regulator or a P590 Series lter (only one may be used, not both) may be ordered with the Type 299H, but not both.
4. For inches w.c., use a pilot supply regulator if actual inlet pressure varies more than ±20 psi / ±1.4 bar and published accuracy is required.
5. This orice size is not available for Types 299HS and 299HSR.
(1)
(3)(4)
: A Type 67CF
Table 1. Body Sizes and End Connection Styles
BODY SIZE,
INCH / DN
1-1/4
1-1/2
2 / 50NPT and CL125 FF
1. This ange is available with a face-to-face dimension of 7.5 inches / 190 mm or 10 inches / 254 mm.
2
Cast Iron (For Types 299H and 299HR only)Ductile IronSteel (For Types 299H and 299HR only)
NPT
NPT
(1)
anged
BODY MATERIAL AND END CONNECTION STYLE
NPT, CL125 FF and CL250 RF anged
- - - NPT
and PN 10/16 anged
- - - NPT
NPT and CL150 RF anged
299H Series
Table 2. Outlet Pressure Ranges
TYPEPILOT CONTROL SPRING
OUTLET (CONTROL)
PRESSURE RANGE
299H
Inch w.c.mbarInchmmInchmm
(1)
3.5 to 6
(1)
5 to 9
(1)
7 to 20
(1)
16 to 40
1 to 3.25 psig
2.75 to 6 psig
5 to 16 psig
14 to 35 psig
30 to 60 psig
1. Use a pilot supply regulator if actual inlet pressure varies more than ±20 psi / ±1.4 bar and the published accuracy is required.
RANGE
69 mbar to 0.22 bar
0.19 to 0.41 bar
0.34 to 1.1 bar
0.97 to 2.4 bar
2.1 to 4.1 bar
SLAM-SHUT
REGISTRATION
9 to 15
12 to 22
17 to 50
40 to 99
(1)
(1)
(1)
(1)
FOR USE WITH MAIN VALVE
SPRING RANGE
Inch w.c.mbarInch w.c.mbarInchmmInchmm
3.5 to 69 to 15
5 to 912 to 22
3.5 to 69 to 15
7 to 2017 to 50
High
Pressure
Trip
Internal or
External
7 to 2017 to 50
16 to 4040 to 99
16 to 4040 to 99
2.75 to 6 psig0.19 to 0.41 bar
2.75 to 6 psig0.19 to 0.41 bar
5 to 16 psig0.35 to 1.1 bar
5 to 16 psig0.35 to 1.1 bar11.6 to 23 psig800 to 1586T14167T00123.1580.00.174.32
5 to 912 to 22
7 to 2017 to 50
7 to 2017 to 50
External
16 to 4040 to 99
1 to 3.25 psig69 mbar to 0.22 bar
2.75 to 6 psig0.19 to 0.41 bar
2.75 to 6 psig0.19 to 0.41 bar
5 to 16 psig0.35 to 1.1 bar
(1)
Low
Pressure
Trip
5 to 9
16 to 40
(1)
(1)
1 to 3.25 psig
Internal
2.75 to 6 psig
2.75 to 6 psig
5 to 16 psig
1. Low Pressure Trip cannot be used with this main valve spring range for an internally registered Type VSX-2 to provide underpressure shutoff under owing conditions. If protection
against loss of inlet pressure is the only required function for the Type VSX-2 then an internally registered Type VSX-2 may be used with the same minimum trip pressures as an
externally registered Type VSX-2.
2. 70% of regulator setpoint is the minimum allowable Low Pressure Trip setting for an internally registered Type VSX-2 used with this main valve spring range. If protection against
loss of inlet pressure is the only required function for the Type VSX-2 then an internally registered Type VSX-2 may be used with the same minimum trip pressures as an externally
registered Type VSX-2.
3. 75% of regulator setpoint is the minimum allowable Low Pressure Trip setting for an internally registered Type VSX-2 used with this main valve spring range. If protection against
loss of inlet pressure is the only required function for the Type VSX-2 then an internally registered Type VSX-2 may be used with the same minimum trip pressures as an externally
registered Type VSX-2.
Note: Other spring combinations are available, please contact your local Sales Ofce for additional information.
Figure 2. 299H Series Operational Schematics (continued)
Internal registration—Outlet pressure is registered
WARNING
!
through the throat (J) to the main diaphragm chamber
and then through a small port (G) to the top of the
Since a pilot-operated regulator is
constructed of both a pilot and a main
valve, do not exceed the maximum inlet
pressure shown on the nameplate.
Letter keys in this section refer to Figure 2 unless
otherwise noted. Fast response and accuracy are
made possible by the amplifying effect of the 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
pilot diaphragm.
External registration—The throat (J) is blocked and a
downstream control line is connected to the pilot upper
diaphragm chamber or the actuator lower diaphragm
chamber. A small port (G) connects the two chambers.
Dual registration—The lower main diaphragm chamber
registers outlet pressure through the throat (J) and the
upper pilot diaphragm chamber registers downstream
pressure by using a downstream control line. The port (G)
between the chambers is blocked.
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
characteristic of a two-path control system.
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. Downstream or outlet pressure
registers underneath the main diaphragm (E) and on top
of pilot diaphragm (F). There are three different versions
of pressure registration for the 299H Series.
Type 299H
In operation, assume the outlet pressure is less than
the setting of the pilot control spring (A). The top side
of pilot diaphragm assembly (F) will have a lower
pressure than the setting of the control spring (A).
The control spring (A) forces the diaphragm assembly
upward, opening the pilot orice (C). Additional loading
pressure is supplied from the pilot orice to the top side
of the main diaphragm (E).
5
299H Series
This creates a higher pressure on the top side of the
main diaphragm (E) than on the bottom side, forcing
the diaphragm downward. This motion is transmitted
through a lever, which pulls the valve disk (K) open,
allowing inlet pressure to ow through the valve.
When the demand in the downstream system has been
satised, the outlet pressure increases. The increased
pressure is transmitted through the downstream control
line (for external or dual registration) or through the
port (G) (for internal registration) and acts on top of the
pilot diaphragm (F). This pressure exceeds the pilot
spring setting and forces the diaphragm down, closing
the orice (C). The loading pressure acting on the
main diaphragm (E) bleeds to the downstream system
through a bleed restriction (H).
With a decrease in loading pressure on top of the
main diaphragm (E), the main closing spring (B)
exerts an upward force on the diaphragm post which
is connected to the main diaphragm (E), pulling it
upward. This moves the main valve disk (K) toward its
seat, decreasing ow to the downstream system.
Type 299HR
During normal operation the Type 299HR performance
is identical to the Type 299H. If an overpressure
condition occurs, the pilot diaphragm head will
separate from the pilot diaphragm post and travel until
it contacts the pilot spring case. The movement of the
diaphragm head creates a path and a token or small
amount of gas will be released.
When the overpressure condition ceases, the pilot
diaphragm head will return to the diaphragm post and
the regulator will return to normal operation.
Type 299HS
The Type VSX-2 slam-shut device on the Type 299HS
regulator is a fast acting slam-shut valve which provides
overpressure or overpressure and underpressure
protection by completely shutting off the ow of gas to
the downstream system. The slam-shut module’s actions
are independent of the Type 299HS main regulator and
of the variations to the inlet pressure. The Type VSX-2
has internal or external registration. External registration
requires a downstream sensing line.
The slam-shut disk is held in the open position (reset
position) by a small ball holding the disk stem. If
the pressure below the diaphragm increases (or
decreases) reaching the Type VSX-2 setpoint,
the diaphragm will travel upwards (or downwards)
operating a lever which in turn releases the ball.
Once the ball is released, the spring force on the stem
will push the stem and disk to the closed position
against the seat shutting off all gas ow. The pilot
supply pressure is also shut off when the Type VSX-2
is closed. The manual reset has an internal bypass to
equalize the reset pressure on either side on the
slam-shut disk.
In order for the Underpressure Shutoff (UPSO) of
any slam shut to be triggered, the downstream pipe
pressure must drop below the UPSO setpoint. In the
case of a downstream line break, numerous factors
can prevent the downstream pipe pressure from
decreasing below the slam-shut UPSO setpoint. These
factors include the distance of pipe to the break, the
diameter of the pipe, size of the break and the number
of restrictions, such as valves, elbows and bends,
downstream of the regulator and/or slam-shut device.
Due to these factors additional protections should be
installed to stop ow in the event of a line break.
Overpressure Protection
Like most regulators, the Type 299H has outlet
pressure ratings lower than the inlet pressure ratings.
Complete downstream overpressure protection is
needed if the actual inlet pressure exceeds the outlet
pressure rating.
Overpressure protection for internal parts is built
into the main and pilot diaphragms by means of a
small spring on each post. The springs will allow
the diaphragm heads to move farther on the posts
avoiding damage to or bending of the valve trim.
Overpressuring any portion of a regulator or
associated equipment may cause leakage, parts
damage or personal injury due to bursting of
pressure-containing parts or explosion of accumulated
gas. Regulator operation within ratings does not
preclude the possibility of damage from external
sources or from debris in the pipeline. A regulator
should be inspected for damage periodically and after
any overpressure condition.
The pilot vent is provided with a 1/4 NPT tapped
connection in the spring case.
Installation
!
WARNING
Personal injury, equipment damage or
leakage due to escaping gas or bursting
of pressure-containing parts might result
6
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