Emerson 299Hs, 299H Data Sheet

Bulletin 71.2:299H

299H Series Pressure Reducing Regulators

January 2014

• Inlet Pressure up to

175 psig / 12.1 bar

• Compact

• Integral Pilot

• ±1% Accuracy for
Fixed Factor Billing (PFM)

• Rugged Construction

• Easy to Maintain

W7513

Figure 1. 299H Series Pressure Reducing Regulators

• High Capacity

• Robust

• Outlet Pressures up

to 60 psig / 4.1 bar

• Optional
Slam-Shut
Conguration

• No Bleed Monitor

• External, Internal or

Dual Registration

• Optional Token Relief

D102683X012

www.sherregulators.com

Bulletin 71.2:299H

Specications

Specications for 299H Series constructions are given below. Some specications 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

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
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 Orice 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 inch / 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)

23 psig / 1.6 bar

Minimum and Maximum Trip Pressure Ranges

See Table 4

Type VSX-2 Sensing Line Connection

1/4 NPT

Flow Coefcients

See Table 3

Flow Capacities

See Tables 5 through 10

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

Control Line Connections

3/4 NPT; See Figures 8 and 9

Temperature Capabilities

(1)

-20 to 150°F / -29 to 66°C

Approximate Weight

21 pounds / 10 kg

Pressure Registration

Internal, External or Dual Registration

See Figure 3

(1)

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

(1)

supply regulator with integral 5 micron

(3)(4)

: A Type 67CF

Polyethylene lter

Construction Materials

Actuator Upper Casings: Aluminum
Actuator Lower Casing: Aluminum
Pilot Spring Case: Aluminum
Actuator Diaphragm: Nitrile (NBR)
Pilot Diaphragm: Nitrile (NBR)
Pilot Inlet Screen: Stainless steel
Valve Body: Cast iron, Ductile iron or Steel
Orice and Valve Stem: Aluminum
Disk Holder: Aluminum holder with Nitrile (NBR) disk
Main Disk Construction: Nitrile (NBR)
Metal Trim Parts For Pilot: Aluminum
Pilot Disk Construction: Nitrile (NBR)
O-rings: Nitrile (NBR)
Fittings: Steel (standard) or Stainless steel
Tubing: Stainless steel

1. The pressure/temperature limits in this Bulletin 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 inch 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 orice size is not available for Types 299HS and 299HSR.

2

3/4 NPT

CONTROL LINE

Bulletin 71.2:299H

W7527-1

TYPE 299H WITH EXTERNAL REGISTRATION TYPE 299HR PILOT WITH OPTIONAL TOKEN RELIEF

Figure 2. 299H Series Sectional Views

Features

• Compact in Size—Small envelope because of the

built-in pilot and internal registration.

• Unique No Bleed Monitor System—Flexible
worker/monitor system setup that allows for
bleed to be piped to the intermediate piping thus
eliminating downstream bleed which reduces lost
and unaccounted for gas. Another advantage of this

conguration is that the system lockup pressure is

that of the worker instead of the monitor.

• Not an Adaptation of Existing Regulators—

New design of integrated cases and internal
registration ports.

• Wide Variety of Applications—Natural gas
distribution systems, gas supply to industrial
boilers, furnaces, ovens, mixers, plant air service.

• Highest Quality— Designed and manufactured to
ISO 9001 standards.

• Accuracy—Keeps constant inlet pressures to
downstream equipment by accurately controlling

distribution system pressures at widely varying ow
rates and supply pressures for maximum efciency

and best operation or by eliminating the need for
pressure-compensating meters by holding a steady
pressure to the meter inlet.

• Optional Token Relief—The Types 299HR and
299HSR with an integral token relief in the pilot is

designed to relieve minor overpressure caused by
thermal expansion.

• High-Capacity Pressure Control—Actuator
diaphragm responds quickly to downstream
pressure change, causing immediate correction in

W7528-1

main valve position. Pilot responds simultaneously

and controls nal positioning of main valve. This

action permits full main valve travel, resulting in
higher capacity than could be obtained without an
external pilot regulator.

• Easy Registration Conversion—Two screws and
O-rings change internal registration to external or
dual registration.

• Easy Startup—No special procedure required.

• Easy to Maintain—Main valve disk and orice can

be inspected without removing body from pipeline.

Easy access two bolt ange permits quick removal

of actuator and pilot from body.

• Economical, Labor-Saving Installation—Supply
pressure to pilot is factory-piped directly from inlet
side of main regulator body, thus requiring no
upstream pilot supply line on standard installations.

• Rugged Construction—With a two bolt connection
of the regulator to the body and no union ring, the
299H Series regulators are designed for longer
service life with minimal maintenance requirements.

• No gaskets—Reusable O-rings at all
serviceable joints.

• Startup Protection—The main valve and the pilot
are designed with reverse pressure mechanisms to
prevent damage during startup or sudden increase
in downstream pressure.

• Fewer Parts—Fewer recommended parts needed
for spare parts inventory.

3

Bulletin 71.2:299H

Introduction

Description

WARNING

!

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.

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 psig / 12.1 bar depending on orice size.

The integral token relief on the Types 299HR and
299HSR regulators is located in the pilot and
alerts you to an increase in downstream pressure
beyond the regulator setpoint.

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 congured 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.

Options

P590 Series Pilot Supply Filter

The optional P590 Series pilot supply lter prevents

pipeline debris from entering the pilot; a primary cause
of pilot clogging. When the upstream system is free of
debris, the 299H Series regulators may be installed

without a pilot supply lter.

Type 67CF Filtered Pilot Supply Regulator

When it is necessary to install a pilot supply regulator,

an optional Type 67CF ltered pilot supply regulator

may be installed. For example, on applications with
inches of water column setpoints and inlet pressure
variations of more than ±20 psig / ±1.4 bar it may
be necessary to install a Type 67CF to maintain
published accuracy.

Principle of Operation

Letter keys in this section refer to Figure 3 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 outlet 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 and fast speed of response
that is characteristic of a two-path 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 main diaphragm (E) and
on top of pilot diaphragm (F). There are three different
versions of pressure registration for the Type 299H.

Internal registration (screws and O-rings (J)
removed)—Outlet pressure is registered through the

throat to the main diaphragm chamber and through a
small port (G) to the top of the pilot diaphragm. Internal
registration is used for ease of installation. Capacity
is somewhat limited because of droop and/or boost
associated with sensing pressure within the body.

External registration—Screws and O-rings (J) block
the throat and a downstream control line is connected to
the pilot diaphragm chamber which is connected to the
lower main diaphragm chamber by a small port (G). The
other end of the control line connects to the downstream
pipeline. External registration is used for higher capacity
and/or the upstream regulator in a monitor set. It also
allows monitoring for inlet pressures over 66 psig /

4.5 bar. Capacity is increased because of better
registration of pipeline pressure when a control line is
used. The alternate 3/4 NPT control line connection
(on the side of the pilot) can be used for piping
convenience, see Figures 8 and 9.

Dual registration (screws and O-rings (J) removed)—
The lower main diaphragm chamber registers outlet
pressure through the throat and the pilot diaphragm
chamber registers downstream pressure by use of
a downstream control line. The port (G) between the
chambers is blocked by inserting a screw and O-ring
(J) that was removed from the throat and the control
line runs from the pilot to the downstream pipeline. Dual

registration, with its larger orice (control line must be

piped to the primary 3/4 NPT connection on the side
of the pilot), provides an improved performance as
compared to internal pressure registration when used in

low ow rate and high pressure drop applications. It is

also used for no downstream bleed monitoring systems
with inlet pressures up to 66 psig / 45 bar.

4

Bulletin 71.2:299H

B

J

A7268_1

OUTLET

INLET

3/4 NPT
CONTROL LINE
CONNECTION

K

G

F

TYPE 299H WITH INTERNAL REGISTRATION

E

H

PILOT
SUPPLY
SCREEN

A

C

J

G

A7269

3/4 NPT
DOWNSTREAM
CONTROL LINE
CONNECTION

EXTERNAL REGISTRATION

INLET PRESSURE

OUTLET PRESSURE

ATMOSPHERIC PRESSURE

LOADING PRESSURE

Figure 3. Type 299H Operational Schematic

A7271

TOKEN RELIEF CLOSED

Figure 4. Type 299HR Operational Schematic

A7270

J

3/4 NPT
DOWNSTREAM
CONTROL LINE
CONNECTION

DUAL REGISTRATION

A7272

TOKEN RELIEF OPEN

G

5

Bulletin 71.2:299H

Type 299HS

Type 299HS

Type 299HS

EXTERNAL REGISTRATION

INTERNAL REGISTRATION

E0072

INLET PRESSURE

OUTLET PRESSURE

ATMOSPHERIC PRESSURE

LOADING PRESSURE

Figure 5. Type 299HS Operational Schematic

EXTERNAL REGISTRATION

INTERNAL REGISTRATION

Type 299H

In operation, assume the outlet pressure is less than
the setting of pilot control spring (A). The top side
of pilot diaphragm assembly (F) will have a lower
pressure than the setting of spring (A). Spring (A)
forces the diaphragm assembly upward, opening the

pilot orice (C). Additional loading pressure is supplied

to the top side of the main diaphragm (E).

This creates a higher pressure on the top side of
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 more gas to ow through the valve.

When the gas demand in the downstream system

has been satised, 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 orice (C). The loading pressure acting on

main diaphragm (E) bleeds to the downstream system
through a bleed restriction (H).

With a decrease in loading pressure on top of main
diaphragm (E), main spring (B) exerts an upward
force on the diaphragm post connected to main

diaphragm (E), pulling it upward. This moves the

main valve disk (K) toward its seat, decreasing ow

to the downstream system.

Type 299HR

Refer to Figure 4. The Type 299HR provides an integral

token relief valve. During an overpressure condition the
spring on the pilot post will allow the diaphragm head to
travel to the spring case. As the diaphragm head moves
a small amount of gas is relieved.

Note

The Type 299HR is not a full capacity
relief device. Approximate start-to­discharge pressure is dependent on set
pressure, see Figure 7.

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
noticeable 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.

6

Bulletin 71.2:299H

Table 1. Body Sizes and End Connection Styles

BODY SIZE,

NPS / DN

1-1/4
1-1/2

2 / 50 NPT, CL125 FF Flanged

1. This ange is available with a face-to-face dimension of 7.5 or 10 inches / 191 or 254 mm.

(For Types 299H and 299HR only)

Cast Iron

NPT
NPT

Table 2. Outlet Pressure Ranges

OUTLET (CONTROL)

PRESSURE RANGE

Inch w.c. mbar Inch mm Inch mm

(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.

69 mbar to 0.22 bar

0.19 to 0.41 bar

0.34 to 1.1 bar

0.97 to 2.4 bar

(1)

9 to 15

(1)

12 to 22

(1)

17 to 50

(1)

40 to 99

2.1 to 4.1 bar

TYPE PILOT CONTROL SPRING

X
X
X
X

X
X
X
X
X

299HR,

299HS and

299HSR

- - - -

- - - -

299H

BODY MATERIAL AND END CONNECTION STYLES

Ductile Iron

- - - ­NPT

(1)

X
X
X
X

X
X
X

NPT, CL125 FF and CL250 RF Flanged,

Part Number Color

T13707T0012
T13589T0012
1N3112X0012
1B413727222

T13593T0012
T13671T0012
T13600T0012
19B0432X012
19B0432X022

PN 10/16 Flanged

Black

Yellow

Unpainted

Purple

Light blue

Orange

Red

Zinc

Green

(For Types 299H and 299HR only)

Free Length Wire Diameter

1.86

2.05

2.18

2.12

2.12

2.40

2.10

2.15

2.75

47.2

52.1

55.4

53.8

53.8

61.0

53.3

54.6

69.8

Steel

- - - ­NPT

NPT, CL150 RF Flanged

0.055

0.051

0.075

0.092

0.105

0.120

0.142

0.207

0.225

1.40

1.30

1.90

2.34

2.67

3.05

3.61

5.26

5.71

Type 299HS

Refer to Figure 5. 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 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 pressure­containing parts or explosion of accumulated gas.

Regulator operation within ratings specied in the
Specications section and on the regulator nameplate

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.

Monitoring Systems

Monitoring regulators serve as overpressure protection
devices to limit system pressure in the event of open
failure of a working regulator feeding the system.

7

Bulletin 71.2:299H

OPTIONAL PILOT SUPPLY
FILTER OR FILTERED PILOT
SUPPLY REGULATOR

WORKING
REGULATOR

A7136A

NOTE: IF USED, THE PILOT SUPPLY REGULATOR SHOULD BE SET TO

3 psig / 0.21 bar ABOVE THE MONITOR OUTLET PRESSURE SETTING.

OPTIONAL PILOT
SUPPLY REGULATOR

WIDE-OPEN
MONITOR

WIDE-OPEN DOWNSTREAM MONITOR

OPTIONAL PILOT
SUPPLY REGULATOR

WIDE-OPEN
MONITOR

OPTIONAL PILOT SUPPLY
FILTER OR FILTERED PILOT
SUPPLY REGULATOR

WORKING
REGULATOR

OPTIONAL PILOT
SUPPLY REGULATOR

A7136B

NOTE: IF USED, THE PILOT SUPPLY REGULATOR SHOULD BE SET TO

3 psig / 0.21 bar ABOVE THE MONITOR OUTLET PRESSURE SETTING.

WIDE-OPEN
MONITOR

OPTIONAL PILOT SUPPLY
FILTER OR FILTERED PILOT
SUPPLY REGULATOR

WORKING
REGULATOR

WIDE-OPEN UPSTREAM MONITOR

OPTIONAL PILOT
SUPPLY FILTER OR
FILTERED PILOT
SUPPLY REGULATOR

WIDE-OPEN
MONITOR

OPTIONAL PILOT
SUPPLY REGULATOR

WORKING
REGULATOR

A7136C

NOTE: THE PILOT SUPPLY REGULATOR SHOULD BE SET TO

3 psig / 0.21 bar ABOVE THE MONITOR OUTLET PRESSURE SETTING.

WIDE-OPEN UPSTREAM MONITOR

Figure 6. Typical Monitor Installations

APPROXIMATE START-TO-DISCHARGE, bar

0.10

40

35

30

25

20

15

SET INCHES W.C.

10

5

0

1.5 2.0 2.5 3.0 3.5 4.0

0.14

YELLOW SPRING
5 TO 9 INCHES W.C. /
12 to 22 mbar
T13589T0012

BLACK SPRING

3.5 TO
6 INCHES W.C. /
9 to 15 mbar
T13707T0012

APPROXIMATE START-TO-DISCHARGE, psig

0.17

0.21 0.24

PURPLE SPRING
16 TO
40 INCHES W.C. /
40 to 99 mbar
1B41372722

UNPAINTED SPRING
7 TO 20-INCHES W.C. /
17 to 50 mbar
1N3112X0012

Figure 7. Type 299HR Approximate Start-to-Discharge

0.28

A7273

NOTE: THE PILOT SUPPLY REGULATOR SHOULD BE SET TO

3 psig / 0.21 bar ABOVE THE MONITOR OUTLET PRESSURE SETTING.

NO DOWNSTREAM BLEED MONITOR SYSTEM

APPROXIMATE START-TO-DISCHARGE, bar

0.14 0.28

SET psig

16

14

12

10

8

6

4

2

0

ORANGE SPRING

2.75 TO 6 psig /

0.19 to 0.41 bar
T13671T0012

LIGHT BLUE
SPRING
1 TO 3.25 psig /
69 mbar to

0.22 bar
T13593T0012

0 2 4

99

87

75

62

50

SET mbar

37

25

12

0.55

0.41

6

APPROXIMATE START-TO-DISCHARGE, psig

0.83 0.97 1.10

0.69

10

8

12 14 16 18 20 22

1.24

RED SPRING
5 TO 16 psig /

0.34 to 1.1 bar
T13600T0012

1.38

1.52

1.10

0.97

0.83

0.69

0.55

0.41

0.28

0.14

SET bar

8

Table 3. Flow Coefcients

Bulletin 71.2:299H

TYPE

ORIFICE DIAMETER WIDE-OPEN REGULATING

Inch mm

1/4 x 3/8

3/8
1/2

299H / 299HR

3/4
7/8

1

1-3/16

1/4 x 3/8

299HS /

299HSR

3/8
1/2
3/4

1. For external/dual registration only.

6.4 x 9.5

9.5
13
19
22
25
30

6.4 x 9.5

9.5
13
19

C

53
117
203
437
544
725
910

53
117
184
421

g

C

v

2.0

4.2

7.0

14.1

16.5

20.7

25.3

2.0

4.1

5.0

11.9

C

50
115
200
430
534
710
885

50
115
180
415

g

(1)

C

1.9

4.0

6.9

13.9

16.2

20.3

24.6

1.9

4.0

4.9

11.7

C1 WHEN ∆P < 10 psi /

v

0.69 bar

26
30
30
32
34
36
37

26
30
38
36

C1 WHEN ∆P > 10 psi /

0.69 bar

26
28
28
30
32
34
35

26
28
36
35

Table 4. Type VSX-2 High and Low Trip Pressure Ranges

RANGE

High

Pressure

Trip

Low

Pressure

Trip

Low

Pressure

Trip

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 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 Ofce for additional information.

SLAM-SHUT

REGISTRATION

Internal or

External

External

Internal

FOR USE WITH MAIN VALVE

SPRING RANGE

Inch w.c.

3.5 to 6 9 to 15

5 to 9 12 to 22

3.5 to 6 9 to 15

5 to 9 12 to 22

7 to 20 17 to 50

7 to 20 17 to 50

16 to 40 40 to 99

16 to 40 40 to 99

2.75 to 6 psig 0.19 to 0.41 bar

2.75 to 6 psig 0.19 to 0.41 bar

5 to 16 psig 0.34 to 1.1 bar

5 to 16 psig 0.34 to 1.1 bar 11.6 to 23 psig 800 to 1586 T14167T0012 3.15 80.0 0.17 4.32

5 to 9 12 to 22

7 to 20 17 to 50

7 to 20 17 to 50

16 to 40 40 to 99

1 to 3.25 psig 69 mbar to 0.22 bar

2.75 to 6 psig 0.19 to 0.41 bar

2.75 to 6 psig 0.19 to 0.41 bar

5 to 16 psig 0.34 to 1.1 bar

(1)

5 to 9

(1)

7 to 20

(1)

7 to 20

(1)

16 to 40

1 to 3.25 psig

2.75 to 6 psig

2.75 to 6 psig

5 to 16 psig

(2)

(2)

(2)

(3)

mbar Inch w.c. mbar

(1)

12 to 22

(1)

17 to 50

(1)

17 to 50

(1)

40 to 99

69 mbar to 0.22 bar

0.19 to 0.41 bar

0.19 to 0.4 1 bar

0.34 to 1.1 bar

(2)

(2)

(2)

(3)

MINIMUM TO MAXIMUM

TRIP PRESSURE

12 to 25 30 to 62 T14162T0012 3.15 80.0 0.07 1.70

20 to 52 50 to 129 T14163T0012 3.15 80.0 0.08 2.03

1.4 to 3.9 psig 97 to 269 T14164T0012 3.15 80.0 0.09 2.31

3.8 to 8.7 psig 262 to 600 T14165T0012 3.15 80.0 0.12 3.051 to 3.25 psig 69 mbar to 0.22 bar

5.8 to 16 psig 400 to 1103 T14166T0012 3.15 80.0 0.14 3.51

2 to 12 5 to 30 T14168T0012 3.15 80.0 0.04 1.09

4 to 30 10 to 75 T14169T0012 3.15 80.0 0.06 1.40

0.36 to 2.3 psig 25 to 159 T14170T0012 3.15 80.0 0.07 1.70

1.5 to 10.8 psig 103 to 745 T14171T0012 3.15 80.0 0.13 3.17

- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -

70% of regulator

setpoint to 2.3 psig

70% of regulator

setpoint to 10.8 psig

75% of regulator

setpoint to 10.8 psig

70% of regulator

setpoint to 159 mbar

70% of regulator

setpoint to 745 mbar

75% of regulator

setpoint to 745 mbar

TYPE VSX-2

SPRING PART

NUMBER

T14170T0012 3.15 80.0 0.07 1.70

T14171T0012 3.15 80.0 0.13 3.17

T14171T0012 3.15 80.0 0.13 3.17

SPRING FREE

LENGTH

Inch mm Inch mm

SPRING WIRE

DIAMETER

9