Parts List ............................................................................ 9
INTRODUCTION
Scope of Manual
This manual provides instructions for installation, startup,
maintenance and spare parts ordering for the B/240 series
spring loaded regulators.
Product Description
The B/240 series regulators are spring loaded single seated,
whit counterbalanced valve disc.
They are usually supplied with safety valve and built in
lter and can be also provided with slam-shut controller for
minimum pressure, maximum pressure or minimum and
maximum downstream pressure.
The regulators of the B/240 series due to their operating
specications are mainly used in those system where
sudden capacity variations are required, or else, where the
cut-off of the gas distribution is controlled by solenoid valve,
such as for the feeding of burners.
They can be used with natural gas, and other not aggressive
gases.
The following versions are available:
B/242 • B242-AP: Regulator
B/249 • B249-AP: Regulator with slam-shut
Versions without relief valve available on request
Tightness cover versions available on request (e.g. B/249-D).
The standard gas pressure devices (regulators and safety
shut-off devices) are those used in the assemblies dealt with
into EN 12186 and EN 12279 and their use has to be under
the provisions into ENs 12186 & 12279.
Fail-to-open stand-alone regulators cannot be used as
a safety accessory according PED 97/23/EC to protect
downstream pressure equipment.
In the pressure regulators (with or without built-in safety
shut-off devices) manufactured by Emerson Process
Management shall be used additionary pressure accessories
(e.g. pilots or lters) manufactured and labeled by Emerson
Process Management.
Emerson Process Management will be not responsible
for any possible inefciency due to installation of not own
production additionary pressure accessories (e.g. pilots or
lters).
When pressure containing parts of possible built-in safety
shut-off device (SSD) valve and pilot have different
maximum allowable pressures, the SSD is differential
strength type.
Figure 1. Regulator Type B/249
Page 2
Type B/240
=x
P.E.D. CATEGORIES AND FLUID GROUP
According to EN 14382, only in integral strength type and
Class A conguration (when both over and under pressure
protections are set up), the possible built-in safety shut-off
device can be classied like a safety accessory according
to PED.
The minimum PS between SSD valve and pilot shall be the
PS of the safety accessory to comply the provisions of EN
14382 about integral strength type.
Downstream equipments, protected by possible built-in
safety shut-off device (in its Class A and integral strength
conguration) of this product, shall have technical features
such as to be category per table below according Directive
97/23/EC “PED”.
Table 1. P.E.D. Category for B/240 Series Regulators
PRODUCT SIZECATEGORYFLUID GROUP
DN 1 1/2” E DN 40
WITHOUT SLAM-SHUT
DN 1 1/2” E DN 40
WITHT SLAM-SHUT
I
IV
1
Outlet Set Pressure Ranges
B/242 • B/249: 10 ÷ 75 mbar
B/242-AP • B/249-AP: 50 ÷ 300 mbar
Range 300 ÷ 500 mbar available on request.
Minimum/Maximum Allowable Temperature (TS)
See label
Functional Features
Accuracy Class AC : up to ± 5%
Lock-up Pressure Class SG : up to + 10%
Slam-Shut Controller
Accuracy Class AG : ± 5%
Response Time t
: ≤ 1 second
a
Temperature
Standard Version: Working -10° to 60°C
Low Temperature Version: Working -20° to 60°C
Possible built-in pressure accessories (e.g. pilots OS66/)
conform to Pressure Equipment Directive (PED) 97/23/EC
Article 3 section 3 and were designed and manufactured in
accordance with sound engineering practice (SEP).
Per Article 3 section 3, these “SEP” products must not bear
the CE marking.
CHARACTERISTICS
Body Sizes and End Connection Styles
B/240 Series
DN 1 1/2” BSP inlet/outlet
B/240-FS Series
DN 40 PN 16 UNI/DIN anged
WARNING
!
The pressure/temperature limits indicated
in this instruction manual or any applicable
standard or code limitation should not be
exceeded.
Materials
Servomotor body: Aluminium
Cover: Aluminium
Body: Ductile iron
Sleeve: Brass
Seat: Brass
Diaphragm: Fabric Nitrile (NBR)
Gaskets: Nitrile (NBR) rubber
LABELLING
Notified
BOLOGNAITALY
O.M.T.
MATRICOLA
SERIALNr.
ANNO
YEAR
NORMEARMONIZ.
HARMONIZEDSTD.
CLASSE DI PERDITA
LEAKAGECLASS
CLASSE FUNZIONALE
FUNCTIONALCLASS
FLUIDO GRUPPO
FLUIDGROUP
TS
Figure 2. Label for B/240 Series Regulators
Note 2
EN
body
APPARECCHIO TIPO /DEVICE TYPE
xxxx
DN1
DN2
Wa
Wao
Cg
pmax
1
PS
°C
body
Wau
bar
PS
bar
covers
Note 1
pao
3
bar PT
bar
bar
bar
bar
PS bar
1.56Note 3
Maximum Operating Inlet Pressure
B/242 • B/249: 6 bar
B/242-AP • B/249-AP: 6 bar
At average ambient temperature.
2
Note 1: See “Characteristics”
Note 2: Year of manufacture
Note 3: Class 1: -10°/60°C
Page 3
Type B/240
OVERPRESSURE PROTECTION
The recommended maximum allowable pressures are
stamped on the regulator nameplate.
If actual version hasn’t a built-in safety shut-off device, some
type of overpressure protection is needed if the actual outlet
pressure exceeds the actual maximum operating outlet
pressure rating.
Overpressure protection should also be provided if the
regulator inlet pressure is greater than the maximum
operating inlet pressure. Downstream side pressure after
possible built-in SSD’s intervention shall stay within the
actual maximum operating set-up range to avoid anomalous
back pressures that can damage the SSD’s pilot.
Downstream overpressure protection shall be also provided
if the SSD outlet pressure can be greater than the PS of the
SSD pilot (differential strength type).
Regulator operation below the maximum pressure limitations
does not preclude the possibility of damage from external
sources or debris in the line.
The regulator should be inspected for damage after any
overpressure condition.
TRANSPORT AND HANDLING
Established transport and handling procedures shall be
followed to avoid any damage on the pressure containing
parts by shocks or anomalous stresses.
Built-up sensing lines and pressure accessories shall to be
protected by shocks or anomalous stresses.
(e.g. : lling/exhausting of fuel gas of internal volume
of the isolated part/entire installation with vent lines
to safe area - 7.5.2 of EN 12186 & 7.4 of EN 12279 ;
monitoring of settings with further exhaust of fuel gas to
safe area ; connection of isolated part/entire installation to
downstream pipeline; ….)
• provision in 9.3 of EN 12186 & 12279 shall be enforced by
pressure regulating/measuring station/installation’s end user
• external tightness test shall be carried out after each
reassembly at installation site using testing pressure in
accordance with national rules
• in case of selfop regulators diaphragm’s incidental failure
the amount of maximum ow to be vented can be calcu-
lated using the universal gas sizing equation, assuming
inlet pressure = regulator’s set-point, outlet pressure =
atmospheric pressure and venting hole DN on the regulator’s upper cover = 16 mm (Cg = 280).
• periodical check/maintenance for surveillance shall be
carried out complying with national regulations, if any, and
specic manufacturer recommendations.
SLAM-SHUT CONTROLLER
The following controllers are used with B/240 series
regulator with built-in slam-shut:
• OS/66 Series spring loaded controllers
ATEX REQUIREMENTS
If the provisions of EN 12186 & EN 12279, national regula-
tions, if any, and specic manufacturer recommendations are
not put into practice before installation and if purge by inert
gas is not carried out before equipment’s start-up and shutdown operations, a potential external and internal explosive
atmosphere can be present in equipment & gas pressure
regulating/measuring stations/installations.
If a presence of foreign material in the pipelines is foreseen
and purge by inert gas is not carried out, the following
procedure is recommended to avoid any possible external
ignition source inside the equipment due to mechanical
generated sparks :
• drainage to safe area via drain lines of foreign materials, if
any, by inow of fuel gas with low velocity in the pipe-work
( 5m/sec)
In any case,
• provisions of Directive 1999/92/EC and 89/655/EC shall
be enforced by gas pressure regulating/measuring station/
installation’s end user
• with a view to preventing and providing protection against
explosions, technical and/or organizational measures
appropriate to the nature of the operation shall be taken
Figure 3. OS/66 Slam-Shut Controller
Table 2. OS/66 Characteristics
MODEL
OS/6660.0220.60.0070.45
OS/66-AP60.250.12.5
BODY
RESISTANCE
bar
OVERPRESSURE
SET RANGE
bar
W
do
Min.Max.Min.Max.
UNDERPRESSURE
SET RANGE
W
bar
du
Materials
Body: Aluminium
Cover: Steel
Diaphragm: NBR rubber
3
Page 4
Type B/240
B/249 • B/249-APB/242 • B/242-AP
50175
DIMENSIONS AND WEIGHTS
∅ 200
153
252170
∅ 125
170
90
75
13048184
175
50
∅ 200
25250
153
7513048
184
FS VERSIONFS VERSION
Note: The regulator can be installed with vertical or horizontal orientation of the actuator.
Figure 4. B/240 Series Dimensions (mm)
Weights:
B/242 • B242-AP: 3.5 Kg B/242-FS • B242-AP-FS: 7.5 Kg
B/249 • B249-AP: 4.5 Kg B/249-FS • B249-AP-FS: 8.5 Kg
4
Page 5
OPERATION
S
L
M
M1
VS
Type B/240
OS/66
D
O
I
O
T
A
F
F
I
C
I
N
A
M
R
T
A
B
O
L
O
T
I
A
A
C
I
N
A
C
C
E
N
G
Y
L
I
N
I
R
A
Figure 5. B/240 Series Operational Schematic
The movements of the diaphragm (D) are transmitted to the valve disc (O) by the stem (S) and the lever (L).
The downstream pressure through the pulse pipe (I) exerts a force under diaphragm (D) and this force is counteracted by the
adjusting spring (M).
The gas pressure on the diaphragm tends to close the valve disc; the antagonist action of the adjustment spring tends to open
it. Under normal conditions the balance between these antagonist actions positions the valve disc in such a way as to ensure a
constant pressure and therefore the downstream capacity.
Upon any capacity variation tending to cause an increase or decrease of pressure in relation to the pre-set pressure, the moving
unit reacts and nds a new balance, so re-establishing the pressure.
Upon request the regulator is also provided with safety valve (VS) incorporated in the diaphragm (D); the adjustment at the pre-set
value is performed by means of spring (M1).
For the operation of the OS/66 slam-shut controller see the Instruction Manual 0048EN-OS66-IM.
5
Page 6
Type B/240
INSTALLATION
• Ensure that the data found on the regulator plate are
compatible with usage requirements.
• Ensure that the regulator is mounted in accordance with
the direction of ow indicated by the arrow.
WARNING
!
Installation shall be in accordance with
national standard for material use limitations in gas pressure reducing stations. Only
qualied personnel should install or service
a regulator. Regulators should be installed,
operated, and maintained in accordance with
international and applicable codes and regulations, and O.M.T. Tartarini instructions. If the
regulator vents uid or a leak develops in the
system, it indicates that service is required.
Failure to take the regulator out of service im-
mediately may create a hazardous condition.
Personal injury, equipment damage, or
leakage due to escaping uid or bursting of
pressure-containing parts may result if this
regulator is over pressured or is installed
where service conditions could exceed the
limits given in the Specications section,
or where conditions exceed any ratings of
the adjacent piping or piping connections.
To avoid such injury or damage, provide
pressure-relieving or pressure-limiting devices (as required by the appropriate code,
regulation, or standard) to prevent service
conditions from exceeding limits.
Additionally, physical damage to the regulator could result in personal injury and prop-
erty damage due to escaping uid. To avoid
such injury and damage, install the regulator
in a safe location. Before installation, check
shall be done if service conditions are con-
sistent with use limitations and if pilot set-up
of possible built-in safety shut-off device
are in accordance with service conditions of
protected equipment.
All means for venting have to be provided in
the assemblies where the pressure equipment are installed (ENs 12186 & 12279).
All means for draining have to be provided in
the equipment installed before regulators &
shut-off devices (ENs 12186 & 12279).
Further the ENs 12186 & 12279, where this
product is used :
• provide the cathodic protection and electrical isolation to avoid any corrosion and
• in accordance with clause 7.3/7.2 of afore-
said standards, the gas shall be cleaned
by proper lters/separators/scrubbers to
avoid any technical & reasonable hazard of
erosion or abrasion for pressure containing parts.
Pressure equipment in subject shall be
installed in non-seismic area and hasn’t to
undergo re and thunderbolt action.
Clean out all pipelines before installation of
the regulator and check to be sure the regulator has not been damaged or has collected
foreign material during shipping.
For threaded bodies, apply pipe compound
to the male pipe threads.
For anged bodies, use suitable line gaskets
and approved piping and bolting practices.
Install the regulator in any position desired,
unless otherwise specied, but be sure ow
through the body is in the direction indicated
by the arrow on the body.
Installation must be done avoiding anomalous stresses on the body and using suitable
joint means according equipment dimen-
sions and service conditions.
For a correct and safe use of the connections check also Instruction Manual and Bulletin before installation.
User has to check and carry out any protection
suitable for assembly’s specic environment.
Note: It is important that the regulator be
installed so that the vent hole in the spring
case is unobstructed at all times.
For outdoor installations, the regulator
should be located away from vehicular trafc
and positioned so that water, ice, and other
foreign materials cannot enter the spring
case through the vent.
Avoid placing the regulator beneath eaves
or downspouts, and be sure it is above the
probable snow level.
STARTUP
The regulator and/or slam-shut controller is factory set at approximately the midpoint of the spring range or the pressure
requested, so an initial adjustment may be required to give
the desired results.
With proper installation completed and relief valves properly
adjusted, slowly open the upstream and downstream line
valves.
a. Slightly and very slowly open the outlet cut-off valve.
b. In case of models tted with slam-shut valve, relatch the
valve by rst loosening cap (C) and then screwing it onto
the stem, after which pull cap outwards until a click is
heard, indicating that balls are duly engaged.
c. Slightly and very slowly open the inlet cut-off valve.
d. Wait for outlet pressure to stabilize.
e. Finally, slowly open inlet and outlet cut-off valves fully.
6
Page 7
Type B/240
ADJUSTMENT
To change the outlet pressure, remove the closing cap
(key. 1) and turn the adjusting nut (key. 2) clockwise to
increase outlet pressure or counter clockwise to decrease
pressure.
Monitor the outlet pressure with a test gauge during the
adjustment.
Remount the closing cap (key. 1).
SHUTDOWN
WARNING
!
To avoid personal injury resulting from
sudden release of pressure, isolate the
regulator from all pressure before attempting
disassembly and release trapped pressure
from the equipment and pressure line.
In case of disassembly of main pressure retaining parts for checks and maintenance procedures, external and internal tightness tests
have to be done according applicable codes.
PERIODICAL CHECKS
CAUTION
It is recommended that checks be made
periodically on the efciency of the regulator
and pilots.
MAINTENANCE
(SEE FIGURE 6)
WARNING
!
All maintenance procedures must be
carried out only by qualied personnel. If
necessary, contact our technical support
representatives or our authorized dealers.
The regulator and it’s pressure accessories are subject
to normal wear and must be inspected periodically and
replaced if necessary.
The frequency of inspection/checks and replacement
depends upon the severity of service conditions and
according to applicable National or Industry codes,
standards and regulations/recommendations.
In accordance with applicable National or Industry codes,
standards and regulations/recommendations, all hazards
covered by specic tests after nal assembling before
applying the CE marking, shall be covered also after every
subsequent reassembly at installation site, in order to ensure
that the equipment will be safe throughout its intended life.
Before proceeding with any maintenance work, shutoff the
gas upstream and downstream from the regulator, also
ensure that there is no gas under pressure inside the body
by loosening the upstream and downstream connections.
Upon completion, check for leaks using suds.
Regulator Checking
Slowly close the outlet cut-off valve and check pressure in
the length of pipe between the regulator and the valve.
If the system is functioning properly, an increase in outlet
pressure will be noticed due to lock-up pressure, after which
pressure will stabilize.
If, on the contrary, outlet pressure continues increasing, the
system is not functioning properly due to improper valve disc
tightness. In this case, close the valve located upstream of
regulator and carry out maintenance procedures.
Relief Valve Checking (if installed)
Close the valve located downstream of regulator. Next,
connect a manual pump or other similar device to a
previously tted impulse connection between the regulator
and the valve and raise the pressure until relief valve is
activated, i.e. until gas is released from vent.
Slam-Shut Controller Checking (if installed)
See the Instruction Manual
0048EN-OS66-IM.
General Maintenance
a. Remove screws (key 56) and clamp (key 55) in order to
take off diaphragm case.
b. Remove bush (key 19) and balancing unit from the body
(key 21).
c. Remove centring unit (key 36) and spring holder (key 16)
and strip all parts down. Carefully clean all parts with
petrol and replace those which are found to be worn out.
d. Check pad holder unit (key 37).
e. By means of the appropriate tool, unscrew seat (key 22)
and check O-ring (key 35). Replace seat if worn or
scored.
f. Remove cap (key 1), ring nut (key 2) and spring (key 3),
taking care to mark the exact position of the ring nut for
remounting.
g. Remove screws (key 15) and take off cover (key 9).
h. Remove the diaphragm unit (key 14) from the servomotor
body (key 44).
7
Page 8
Type B/240
i. Check diaphragm and if worn or damaged, dismount the
diaphragm unit and replace it.
Unscrew register nut (key 4) and then remove spring
(key 6).
In the models tted with relief valve take care to mark the
height of the preloaded spring in order to reassemble it
in its original position, thus ensuring proper setting of the
relief valve.
j. Check O-ring (key 17 and 24).
Relatching Unit Maintenance (if installed)
a. Trigger actuator and remove impulse line (A).
b. Loosen dowels (G) and remove OS/66 actuator.
c. Remove plug (key 29) from regulator and check stem
(key 28); if worn or damaged, dismount the pad holder
(key 33) and replace the stem.
d. Carefully clean and check all components, replacing
those worn out.
See the Instruction Manual 0048EN-OS66-IM for the
slam-shut controller maintenance.
Reassembling
Lubricate all seals with “MOLYKOTE 55 M” and be very
careful not to damage them when reassembling.
Reassemble by reversing the above steps.
As you proceed, make sure that parts move freely and
without friction.
In addition:
a. Diaphragm unit (key. 14), is properly reassembled by
lubricating it with some grease and by carefully tting it
into the servomotor body (key. 44).
b. All screws are duly tightened in order to ensure proper
sealing.
c. If installed check the correct relatching of the slam-shut
controller (see Startup item b).
d. Check for leaks using suds.
SPARE PARTS
Spare parts storage shall be done by proper procedures
according to national standard/rules to avoid over aging or
any damage.
TROUBLESHOOTING
SYMPTOMSCAUSEACTIONS
The regulator does not open
Drop in pressure downstream from the regulator
Increase in pressure downstream from the regulator
or safety devices being activated
(relief valve or slam-shut valve)
Table 3. General Troubleshooting for B/240 Series
Lack of incoming gasCheck the station feeding
The slam-shut controller has not been resetManually reset the slam-shut controller
Insufcient upstream pressureCheck the station feeding
Flow requirements higher than the ow
that the regulator can supply
Filter upstream is obstructedClean or replace it
Tight shutoff gaskets are wornTo be replaced
Deposits of grime on the tight shutoff pad are
obstructing proper positioning of the shutter
Diaphragm damagedTo be replaced
Check the regulator sizing
Clean or replace it
Slam-shut device does not execute tight
shutoff procedure
8
O-ring and/or slam-shut pad wornTo be replaced
Slam-shut seat damagedTo be replaced
Page 9
PARTS LIST
A
Key Description
1 Cap
2 Ring nut
3 Spring
4 Nut
5 Spring holder
6 Spring
7 Relief valve guide
8 Special nut
9 Cover
10 Spring guide plate
11 Diaphragm plate
13 Relief valve stem
14* Diaphragm unit
15 Screw
16 Spring holder
17* O-ring
18* Hub unit
19 Bush
20* Diaphragm
21 Body
22 Seat
23* Pad unit
24* O-ring
25 Slam-shut controller OS/66
26 Connection
27* O-ring
28 Stem
29 Plug
30* O-ring
31 Spring holder
32 Spring
33 Pad holder
34 Elastic ring
35* O-ring
36 Centring unit
37* Pad holder unit
38* O-ring
39 Plate
40 Shaft
41 Spring
42 Spacer
43 Lever
44 Servomotor body
45 Connection
46 Elastic washer
47 Frame
48 Elastic ring
49 Net
50 Lid
51 Label
52 Screw
53 Pin
54 Dado
55 Clamp
56 Screw
57 Pipe
58 Connection
59 Pipe
60 Pipe extension
64 Pawl
66 Flange
67 Hub
68* O-ring
69 Relief valve pipe
70 Relief valve plate
71 Filter
72 Elastic pin
73* O-ring
74 Relief valve seat
75 Gasket
77* O-ring
78 Screw
79 Plate
Rubber parts marked with (*) are supplied in the “spare parts kit”,
recommended as stock. To order the kit it is necessary to communicate to
us the type of the regulator and its serial number.
PIPE EXTENSION, ONLY FOR OUTLET
PRESSURES 15 TO 40 mbar
6059
58
55
53
52
Type B/240
78
54 56
I
A
N
C
I
I
N
A
C
R
A
A
T
R
A
N
Y
L
G
A
O
L
T
I
O
B
C
E
M
A
N
I
C
I
F
F
O
T
A
Figure 6. B/240 Series RegulatorLM/1234
9
Page 10
Type B/240
SEC. A-A
C
FOR THE VERSIONS WITHOUT RELIEF
VALVE MAKE SOLID SPRING KEY 6
5
3
69
2
1
A
26
27
28
G
30
31
25
24
23
71
2122
20
19
18
17
C
29
32
33
34
35
36
37
57
38
16
39
15
40
14
41
70
42
7
8
11 12
43
44
45
LM/1234
10
13
72
73
10
4
6951
50
74
49
75
46
48
Figure 6. B/240 Series Regulator (continued)
47
Page 11
B/240-FS VERSION
Type B/240
B/242 VERSION
29
68
67
66
HIGH PRESSURE VERSION
1
64
7
5
6
68
67
66
OUTLET PRESSURE UP TO 0.5 bar
QL VERSION DETAIL
79101580
LM/1234
TIGHTNESS COVER VERSION
BP DETAILAP DETAIL
1
1
7777
Figure 6. B/240 Series Regulator (continued)
11
Page 12
Type B/240
Natural Gas Technologies
Emerson Process Management
Regulator Technologies, Inc.
O.M.T
Ofcina Meccanica Tartarini s.r.l.
Via P. Fabbri, 1
I - 40013 Castel Maggiore (Bologna)
Italy
Tel. : +39 - 0514190611
Fax: +39 - 0514190715
E-mail: info.tartarini@emerson.com
For further information visit: www.emersonprocess.com/regulators
The Emerson logo is a trademark and service mark of Emerson Electric Co. All other marks are the property of their prospective owners. Tartarini is a mark of O.M.T. Ofcina Meccanica Tartarini s.r.l.,
a business of Emerson Process Management.
The contents of this publication are presented for informational purposes only, and while every effort has been made to ensure their accuracy, they are not to be construed as warranties or guaran-
tees, express or implied, regarding the products or services described herein or their use or applicability. We reserve the right to modify or improve the designs or specications of such products at
any time without notice.
Emerson Process Management does not assume responsibility for the selection, use or maintenance of any product. Responsibility for proper selection, use and maintenance of any Emerson Process
Management product remains solely with the purchaser.