Emerson BM6X Series User manual

BM6X Series
Instruction Manual
0028EN-BM6X-IM
February 2010 - Rev. 00
O.M.T.
SUMMARY
Introduction ........................................................................ 1
PED Categories and Fluid Group ...................................... 2
Characteristics ................................................................... 2
Labelling ............................................................................ 2
Overpressure Protection .................................................... 3
Transport and Handling ..................................................... 3
Atex Requirements ............................................................ 3
Slam-Shut Controller ......................................................... 4
Dimensions and Weights ................................................... 5
Operation ........................................................................... 6
Installation ......................................................................... 7
Startup ............................................................................... 9
Slam-Shut Controller Adjustment ...................................... 9
Shutdown ........................................................................... 9
Maintenance ...................................................................... 9
Slam-Shut Controller Maintenance ....................................10
Spare Parts ........................................................................ 11
Troubleshooting .................................................................12
Parts Lists ..........................................................................12
Schematic Assemblies .......................................................14
INTRODUCTION
Scope of Manual
This manual provides instructions for installation, startup,
maintenance and spare parts ordering for the BM6X
Series slam-shut valves. It also contains information for the
OS/80X-R Series slam-shut controller.
Product Description
The BM6X Series slam-shut valves are axial ow type.
The slam-shut valves in the BM6X series are used in natural
gas reduction, distribution and transfer stations.
They can also be used with air, propane, butane, LPG, city
gas, nitrogen, carbon dioxide and hydrogen.
The standard gas pressure devices (safety shut-off
devices - SSD slam-shut type) 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.
In the safety slam-shut valves manufactured by Emerson
Process shall be used additional pressure accessories (e.g.
controller or lters) manufactured and labeled by Emerson
Process.
Emerson Process will be not responsible for any possible
inefciency due to installation of not own production
additional pressure accessories.
When pressure containing parts of safety slam-shut device
(SSD) valve and controller have different maximum allow-
able pressures (PS), the SSD is differential strength type.
BM6X Series Slam-Shut Valve
Figure 1. BM6X Series Slam-Shut Valve

BM6X Series
2
PED CATEGORIES AND FLUID GROUP
According to EN 14382, only in integral strength type and
Class A conguration (when both over and under pressure
protections are set up), this slam-shut valve can be classied
like a safety accessory according to PED.
The minimum PS between SSD valve and controller shall be
the PS of the safety accessory to comply the provisions of
EN 14382 about integral strength type.
This product in its Class A and integral strength conguration
is a safety accessory for pressure equipment in the following
Pressure Equipment Directive 97/23/EC categories.
Table 1. P.E.D. Category for BM6X Series Slam-Shut Valves
PRODUCT SIZE CATEGORY FLUID GROUP
DN 80-100-150-200-250-300 IV 1
Possible built-in pressure accessories (e.g. controllers
OS/80, OS/80-X) 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
DN 80 - 100 - 150 - 200 - 250 - 300
ANSI 150 - 300 - 600 anged
!
WARNING
Maximum Operating Inlet Pressure(1)(2)
ANSI 150: 20 bar
ANSI 300: 50 bar
ANSI 600: 100 bar
Overpressure Set Range
0.03 ÷ 80 bar
Underpressure Set Range
0.01 ÷ 80 bar
Minimum/Maximum Allowable Temperature (TS)(1)
See label.
The pressure/temperature limits indicated in this instruction manual or any1.
applicable standard or code limitation should not be exceeded.
At average ambient temperature.2.
Functional Features
Accuracy Class AG : ± 1%
Response Time ta : ≤ 1 second
Temperature
Standard Version: Working -10° ÷ 60°C
Low Temperature Version: Working -20° ÷ 60°C
Materials
Body: Steel
Buttery disk: Cast iron or steel
Shaft: Steel
Spring: Stainless steel
Lip seal: FKM
O-ring: NBR nitrile rubber or FKM
LABELLING
APPARECCHIOTIPO/DEVICE TYPE
Wau
DN2
DN1
MATRICOLA
bar
bar
SERIAL Nr.
°C
FLUIDO GRUPPO
FLUID GROUP
ANNO
YEAR
HARMONIZED STD.
bar
NORME ARMONIZ.
LEAKAGE CLASS
CLASSE DI PERDITA
FUNCTIONAL CLASS
CLASSE FUNZIONALE bar
Wao
Wa
TS
bar
pao
Cg
PS
body bar PT= xPS bar
PS
covers
EN
bar
pmax
xxxx
body
Notified
BOLOGNA ITALY
O.M.T.
1.5Nota4Nota3
Nota2
Nota1
1
-
Figure 2. Label for BM6X Series Slam-Shut Valves
Note 1: BM6X
Note 2: Year of manufacture
Note 3: Class 1: -10°/60°C
Class 2: -20°/60°C
Note 4: ANSI 150 PS: 20 bar
ANSI 300 PS: 50 bar
ANSI 600 PS: 100 bar
OVERPRESSURE PROTECTION
The recommended maximum allowable pressures are
stamped on the slam-shut valve label.
Upstream overpressure protection shall be provided if the
inlet pressure is greater than the maximum operating inlet
pressure.

BM6X Series
3
Downstream side pressure after slam-shut valve’s
intervention shall stay within the actual maximum operating
set-up range to avoid anomalous back pressures that can
damage the SSD’s controller.
Downstream overpressure protection shall be also provided
if the slam-shut valve outlet pressure can be greater than the
PS of the pilot (differential strength type).
Slam-shut valve operation below the maximum pressure
limitations does not preclude the possibility of damage from
external sources or debris in the line.
The slam-shut valve should be inspected for damage after
any intervention.
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.
Eyebolts are designed just for handling of equipment weight.
Built-up sensing lines and pressure accessories
(e.g. slam-shut controller) shall to be protected by shocks or
anomalous stresses
ATEX REQUIREMENTS
!
WARNING
If the provisions of EN 12186 & EN 12279,
national regulations, if any, and specic
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 shut-down
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 inow 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
(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
periodical check/maintenance for surveillance shall be•
carried out complying with national regulations, if any, and
specic manufacturer recommendations.

BM6X Series
4
SLAM-SHUT CONTROLLER
The BM6X Series slam-shut valves are equipped with the OS/80X-R or OS/80X-R-PN series slam-shut reinforced version controller.
The controllers are supplied in different models according to set ranges required.
Figure 3. OS/80X-BP-R Slam-Shut Device
Table 2. Characteristics for Type OS/80X-R Spring Loaded Pneumatic Slam-Shut Controller
Table 3. Characteristics for Type OS/80X-R-PN Pneumatic Slam-Shut Controller with Type PRX Pilot
MODEL SERVOMOTOR
BODY
RESISTANCE
(bar)
OVERPRESSURE SET RANGE
Wdo (bar)
UNDERPRESSURE SET RANGE
Wdu (bar) BODY
MATERIAL
VALVE FLOW FROM
LEFT TO RIGHT
VALVE FLOW FROM
RIGHT TO LEFT Min. Max. Min. Max.
OS/80X-BP-S-R OS/80X-BP-R 5
0.03 2 0.01 0.6 Aluminium
OS/80X-BPA-D-S-R OS/80X-BPA-D-R 20
OS/80X-MPA-D-S-R OS/80X-MPA-D-R
100
0.5 5 0.25 4
Steel
OS/80X-APA-D-S-R OS/80X-APA-D-R 2 10 0.3 7
OS/84X-S-R OS/84X-R 5 41 4 16
Brass
OS/88X-S-R OS/88X-R 18 80 8 70
N.B.: 1/4” NPT female threaded connections
MODEL
SERVOMOTOR BODY
RESISTANCE
(bar)
OVERPRESSURE SET RANGE
Wdo (bar)
UNDERPRESSURE SET RANGE
Wdu (bar) BODY MATERIAL
Min. Max. Min. Max.
OS/80X-R-PN 100 0.5 40 0.5 40 Aluminium
OS/84X-R-PN 100 30 80 30 80 Brass
OS/80X-R-PN: Pressure range 0.5 to 40 bar
Appliance made of an OS/80X-APA-D-R set at about 0.4 bar and a variable number of PRX/182 pilots for overpressure and PRX/181 for underpressure, as many as
necessary to control different points of the installation.
OS/84X-R-PN: Pressure range 30 to 80 bar
Appliance made of an OS/84X-R set at about 20 bar and a variable number of PRX-AP/182 pilots for overpressure and PRX-AP/181 for underpressure, as many as
necessary to control different points of the installation.
N.B.: 1/4” NPT female threaded connections.

BM6X Series
5
A
BE
D
C
I
Figure 4. Type BM6X Series Dimensions
Table 4. Type BM6X Series Dimensions (mm)
Table 5. Type BM6X Series Weights (kg)
TYPE DN 80 DN 100 DN 150 DN 200 DN 250 DN 300
A155 170 220 220 220 220
B250 290 415 445 480 510
C54 70 102 135 168 203
ANSI 150
D190 230 279 343 406 482
E95 115 140 172 203 241
I197 227 284 342 375 436
ANSI 300
D210 254 318 381 445 521
E105 127 159 191 223 261
I217 245 303 361 407 468
ANSI 600
D210 274 357 419 508 559
E105 137 179 220 254 280
I235 264 354 419 490 531
N.B. The B dimensions are indicative and refer to the models with larger dimensions.
The threaded opening for the connection of the control line is 1/4” NPT female.
TYPE DN 80 DN 100 DN 150 DN 200 DN 250 DN 300
ANSI 150
10
13
22 33 47 81
ANSI 300 26 42 56 90
ANSI 600 15 33 51 85 125
DIMENSIONS AND WEIGHTS

BM6X Series
6
Figure 5. Type BM6X Operational Schematic
OPERATION
The slam-shut valve can only be opened if the upstream and
downstream pressures are equal.
The IT/2V by-pass valve with automatic return makes it
possible to balance these pressures. The valve can only be
opened manually by rotating the pilot reset shaft.
When the controlled pressure lies within the set levels for the
pilot, the latter remains set and prevents rotation of the shaft
while keeping the buttery disk open.
When said pressure changes beyond the set levels, the
buttery disk moves to the closure position.
Slam-shut Valve
The BM6X series slam-shut valve consists of a “wafer” type
valve body, an pilot and a by-pass valve.
The valve body has an off-center buttery disk that is
mounted eccentrically on the reset shaft.
A lip seal ensures tightness.
The spring thrust, with the additional weight of the eccentric
off-center buttery disk, ensures punctual and safe closure
under any working conditions.
In addition, the compression of the seal, which is determined
by the pressure, ensures perfect tightness.
Lip seal
Spring
IT/2V by-pass valve
Controller
Reset shaftControlled pressure
Off-center butterfly shutter

BM6X Series
7
Figure 6. BM6X Series Connection/Installation Schematics
SLAM-SHUT VALVE WITH OS/80X-R CONTROLLER - INSTALLATION IN A LOW PRESSURE REGULATING LINE
SLAM-SHUT VALVE WITH OS/80X-R-PN CONTROLLER - OVERPRESSURE AND UNDERPRESSURE CONTROL DOWNSTREAM OF REGULATORS
NOTE: RECOMMENDED PIPING IS STAINLESS STEEL WITH 10 mm DIAMETER.
DOWNSTREAM OR TO A SAFE AREA
1
LEGEND:
INSTALLATION
OS-80X
ON
OFF
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N
Z
A
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Slam-shut Valve
BM6X
PS/79-1
MonitorRegulator
PS/79-1
OS-80X
ON
OFF
E
M
E
R
G
E
N
Z
A
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M
O
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S
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T
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M
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N
C
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Slam-shut Valve
BM6X
PS/79
Gicleur
(1 mm)
Monitor
PRX/182
PRX/181
Regulator
PS/79

BM6X Series
8
INSTALLATION (CONTINUED)
Ensure that the data found on the slam-shut valve label•
are compatible with usage requirements.
Make sure that slam-shut controller is installed up-right.•
Ensure that the slam-shut valve is mounted in accordance•
with the direction of ow indicated by the arrow.
Make the connection of the pressure control pipe, taking•
it off a straight section of the downstream pipe, if possible
far from narrow sections, curves, or branches, to avoid
variations in the release values of slam-shut device
caused by turbulence.
!
WARNING
Only qualied personnel should install or
service a slam-shut valve.
Slam-shut valve should be installed,
operated, and maintained in accordance
with international and applicable codes and
regulations.
If the slam-shut valve vents uid or a leak
develops in the system, it indicates that
servicing is required.
Failure to take the slam-shut valve out of
service immediately 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 slam-shut valve is overpressured
or is installed where service conditions
could exceed the limits given in the
“Characteristics” 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
slam-shut valve could result in personal
injury and property damage due to escaping
uid.
To avoid such injury and damage, install the
slam-shut valve in a safe location.
Before installation, check shall be done if
service conditions are consistent with use
limitations and if its slam-shut device set-up
is 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 the slam-shut
valve (ENs 12186 & 12279).
Further the ENs 12186 & 12279, where this product is used:
Provide the cathodic protection and electrical isolation to•
avoid any corrosion
In accordance with clause 7.3/7.2 of aforesaid 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
Slam-shut valve shall be installed in non-seismic area and
hasn’t to undergo re and thunderbolt action.
Clean out all pipelines before installation of the slam-shut
valve and check to be sure the slam-shut valve has not been
damaged or has collected foreign material during shipping.
Use suitable line gaskets and approved piping and bolting
practices.
Installation must to be done avoiding anomalous stresses on
the body and using suitable joint means (bolts, anges, …)
according equipment dimensions and service conditions.
Install the slam-shut valve in any position desired, unless
otherwise specied, but be sure ow through the body is in
the direction indicated by the arrow on the body.
User has to check and carry out any protection suitable for
assembly’s specic environment.
For outdoor installations, the slam-shut valve should be
located away from vehicular trafc and positioned so that
water, ice, and other foreign materials cannot enter into the
pilot mechanism.
Avoid placing the slam-shut valve beneath eaves or
downspouts, and be sure it is above the probable snow
level.
STARTUP
The built-in 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 obtain desired results.
a. Slightly and very slowly open inlet valve upstream of the
BM6X/.
b. Open by-pass valve (key 18) by pressing knob (P). Keep
knob pressed until downstream pressure increases so
as to permit valve disc to become balanced, after which
release knob.

BM6X Series
9
c. Using the appropriate lever, rotate shaft (B) in the
direction shown by the arrow stamped on the OS/ cover
so as to permit slam shut valve to open. Keep the valve
open manually
CAUTION
In case you note an excessive resistance
in the opening manouvre you have to
depressurize the upstream pipe slightly.
d. Slightly open outlet valve and wait for downstream
pressure to stabilize.
e. Act on shaft (B) several times to make sure that actuator
remains properly latched.
f. First slowly open the valve upstream of the BM6X/
completely, then slowly open the valve downstream of the
regulator.
SLAM-SHUT CONTROLLER
ADJUSTEMENT
To change the slam-shut controller setpoints (overpressure
and/or underpressure), remove the spring closing cap of
the controller and turn the adjusting screws clockwise to
increase outlet pressure or counterclockwise to decrease
pressure.
Monitor outlet pressure with a test gauge during the adjustment.
SHUTDOWN
!
WARNING
To avoid personal injury resulting from sud-
den release of pressure, isolate the slam-shut
valve from all pressure before attempting dis-
assembly 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 to applicable codes.
MAINTENANCE
(SEE FIGURE 7)
!
WARNING
All maintenance procedures must be carried
out only by qualied personnel.
If necessary, contact our technical support
representatives or our authorized dealers.
The valve 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 specic 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 valve, 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.
General Maintenance
a. Cause the actuator to trigger, remove the impulse line (A)
and take off the slam shut valve from the line.
b. Loosen screws (key 13) and slide the controller out.
c. Remove gasket retaining ring (key 26) and replace gasket
(key 25).
d. Loosen screws (key 10) and remove hub (key 14).
e. Loosen plug (key 6). Loosen screws (key 21), remove
washers (key 22), and shaft lever (key 29).
f. Rotate the shaft (key 2) for 180° and take off the bracket
(key 27). Dismount the shaft from the OS/80X-R side.
CAUTION
The valve shutter (key 24) is free, hold it in
order to prevent it from falling.
g. With the given special wrench dismount the guide bushes
(key 8), and replace O-Rings (key 3 and 5).
h. Check all moving parts, paying special attention to nickel
plated surfaces. Replace any that are worn or damaged.
i. Remove by-pass valve (key 18) and carry out
maintenance
Reassembly
Lubricate all seals with MOLYKOTE 55 M, being very careful
not to damage them when reassembling.
Reassemble the parts by reversing the above steps.
As you proceed, make sure that parts move freely and
without friction.

BM6X Series
10
In addition:
a. Complete reassembly and make sure to tighten all screws
uniformly.
b. During the shaft insertion inside the shutter it’s necessary
to push spring (key 9). Make sure not to damage the shaft
surface, near the guide bushes
c. When reassembling lever shaft (29) replace the special
washers (22).
!
WARNING
Check the dimension “C” value indicated on
Table 7. If is necessary adjust, through the
appropriate screw (key 20), the buttery’s
position.
d. After the reassembly completion, check the proper
functioning of all parts. Check the valve with soapy water,
making sure there are no leaks.
e.
Remount valve on the line and reestablish all connections.
SLAM-SHUT CONTROLLER
MAINTENANCE (SEE FIGURE 8)
Installation
a. Install the slam-shut controller in a covered area and
protect it against weather agents.
b. Check that data on the plate are compatible with actual
working conditions.
c. Make sure slam-shut controller is installed upright, i.e.
screw (key 49) on top.
CAUTION
Mounting in any other way will jeopardize
controller’s performance.
d. Carry out the connection of gas outlet (A). It must be
derived from the pressure control piping, in a straight
tract, possibly far away from restrictions, curves or
derivations, in order to avoid turbulence that can alter the
trip pressure setpoints.
Startup
a. Using lever, activate slam-shut by turning reset stem
(key 6) in the direction shown by the arrow.
b. Wait until the pressure being controlled stabilizes and
then slowly release lever.
c. Now repeat this procedure, make sure that levers keep
slam-shut controller properly set and that lever (key 33) is
in horizontal position.
Periodical Checks
It is recommended that slam-shut controller be efciency
checked periodically.
Cut-off Test
a. Cut-off the circuit by means of inlet and outlet valves and
disconnect the pressure control pipe (A). The slam-shut
controller should cut-off at minimum pressure (only if so set).
b. Through the pressure control connection, use a small
pump or other appropriate means, to raise the pressure
to normal operating level. Reset slam-shut controller after
cut-off in step a.
c. Simulate pressure increase until maximum pressure cutoff
value is reached.
d. Connect the pressure control slam-shut controller (A) and
set the circuit back to operating conditions by following
the instructions described in the Startup section.
Valve-seal Check
a. Slowly close the valve located downstream.
b. Press the “EMERGENCY” button. This will cause the
immediate closing of slam-shut controller.
c. Loosen a connector in the downstream line of the
slam-shut valve or of the regulator. Check the connector
with soap and water, making sure there are no leaks;
make any necessary repairs otherwise.
Maintenance
Routine slam-shut controller maintenance entails simply
periodic checking of the diaphragm on the Type OS/80X-R
(the piston Gaco ex on the Type OS/84X-R) and the
movement of the levers, i.e. they should move freely with
a minimum of friction. If necessary, lubricate pins with
“Molykote 55 M”.
!
WARNING
For a successful job it is indispensable to
use qualied personnel, possibly calling
on our Technical Support Representatives.
Before starting maintenance, disconnect
impulse connection (A) to make sure there
is no gas under pressure in the slam-shut
controller. When maintenance operations are
nished check the tightness with suds.
Replacing Diaphragm (OS/80X-R Series only)
a. Remove screws (key 27) and cover (key 61).
b. Replace diaphragm (key 62).
c. To remount diaphragm, coat it with grease, set it in place
around the edge of cover (key 61) and evenly tighten
screws (key 27) to ensure proper sealing.

BM6X Series
11
Replacing O-ring (Type OS/84X-R and OS/88X-R only)
a. Remove plug (key 61) and extract piston (key 68) from
body (key 60).
b. Replace O-ring (key 67) and gaco ex (key 66).
c. Reassemble by reversing the above procedures.
General Maintenance
a. Remove screws (key 40) and casing (key 47).
b. Remove dowels (key 12) and bushing (key 13).
c. Slide off stem (key 6), lever assembly (key 17 and 2),
rollers (key 10) and shim ring (key 15). Wash parts,
replace any if worn.
d. Remove nuts (key 18), levers (key 20 and 36) and springs
(key 37 and 21).
e. Remove nut (key 30), screw (key 29) and lever (key 33).
f. Remove minimum adjusting screw (key 49), maximum
adjusting nut (key 50) and springs (key 53 and 54).
g. Remove cover (key 61) on OS/80X-R Series, or plug on
types OS/84X-R and OS/88X-R, and proceed as directed
in replacing diaphragm/O-ring section.
h. Remove nut (key 70) and locknut (key 69), then slide off
stem unit (key 57).
i. Loosen screw (key 3), unscrew nut (key 9), remove rollers
holder (key 5) and check seals (key 4 and 8) for wear.
J. Clean all parts with petrol, replace any if worn.
Reassembly
Reassemble all parts by reversing the steps in the general
maintenance section.
As you proceed, make sure all parts move freely without
friction. If necessary, lubricate them with Molykote 55 M.
Make sure to:
a. Narrow the gap between nuts (key 30 and 18) so that
levers (key 33, 36, and 20) have minimum play yet move
freely without friction.
b. Before mounting minimum spring (key 54), register
position of lever (key 33) by means of nut (key 70),
locking it into place with locknut (key 69).
CAUTION
The lever (key 33) is in proper position when
it is exactly horizontal and in the center of
the groove of lever (key 36).
c. Now remount lever assembly (key 17 and 2), rollers
(key 10), keeping them in their seat with grease, and stem
(key 6), which is to be turned so the rollers enter their
seats. The stem and lever assembly should now be tightly
tted together.
d. Remount bushing (key 13), make sure that the dowels are
rmly set in the grooves of the stem (key 6).
e. Repeatedly check if pilot resets properly and, lastly,
remount minimum spring (key 54).
f. Always check controller setting.
Minimum and Maximum Setting
a. Make sure that the lever (key 33) is in horizontal position
when slam-shut controller is reset. If necessary, use
nut and locknut (key 69 and 70) to adjust (see step b,
Reassembly section).
b. Use maximum adjusting nut (key 50) to completely load
maximum pressure spring (key 53). Loosen minimum
adjusting screw (key 49) to completely relieve minimum
pressure spring (key 54).
c. Disconnect pressure control pipe (A).
d. Through the pressure control connection, use a small
pump or other appropriate means to raise the pressure to
normal operating level.
e. Reset slam-shut controller and reduce the pressure until it
reaches minimum cutoff level.
f. Use minimum adjusting screw (key 49) to load spring
(key 54) slowly until pilot is triggered.
g. Repeat procedures (d) and (e) above, making any
necessary adjustment in the setting.
h. Bring pressure back to normal values.
i. Reset controller and raise the pressure until it reaches
maximum cutoff level.
j. Using maximum adjusting nut (key 50), slowly unload
spring (key 53) until cut-off point is reached.
k. Repeat procedures (h) and (i) above, making any
adjustment necessary in the setting.
CAUTION
Whenever minimum or maximum pressure
setting is not required, omit corresponding
steps.
SPARE PARTS
Spare parts storage shall be done by proper procedures
according to national standard/rules to avoid over aging or
any damage.

BM6X Series
12
Table 6. Troubleshooting for BM6X Series Slam-Shut Valve
SYMPTOMS CAUSE ACTIONS
Slam-shut device does not remain set
The actuator impulse intake (A) is not
connected properly Check connections (A)
Downstream pressure coincides with the
maximum or minimum slam-shut settings Check slam-shut settings
Diaphragm (key 62) is damaged
(Gaco ex (key 66) on types OS/84X-R, OS/88X-R) Replace the diaphragm
Sleeve does not seal properly
Worn seal gaskets Check gaskets
Dirt deposit on sleeve Check sleeve
Shaft (key 2) damaged Check shaft
TROUBLESHOOTING
PARTS LISTS
BM6X Series Slam-Shut Valve
(See Figure 7)
Key Description
1 Eyebolt
2 Shaft
3* O-Ring
4* Antiextrusion ring
5* O-Ring
6 Plug
7 Bush
8 Guide bush
9 Spring
10 Screw
11 Needle
12 Controller
13 Special screw
14 Hub
15 Screw
16 Screw
17 Bracket
18 IT/2V by-pass valve
19 Self locking nut
20 Screw
21 Screw
Key Description
22* Washer
23 Body
24 Shutter
25* Gasket
26 Ring
27 Shaft bracket
28 Pin
29 Shaft lever
30 Bracket
31 Screw
32 Plate
33 Rivet
34 Shaft
35 Screw
36 Hub
37 Pin
38* O-Ring
39 Shaft
40 Washer
41 Washer
42 Ring nut

BM6X Series
13
OS/80X-R Series Slam-Shut Controller
(See Figure 8)
Key Description
1 Plate
2 Releasing bushing
3 Screw
4* Gasket
5 Rollers holder
6 Stem
7 Roller
8* O-ring
9 Reloading nut
10 Roller
11 Roller
12 Dowels
13 Reloading bushing
14* O-ring
15 Ring
17 Reloading lever unit
18 Self-locking nut
19 Washer
20 Return lever
21 Spring
22 Fulcrum
24 Label
26 Nut
27 Screw
28 Reloading pin
29 Screw
30 Self-locking nut
31 Washer
32 Plate fulcrum
33 Lever
34 Screw
35 Cone
36 Releasing lever
37 Spring
38 Plug
39 Locking pin
40 Screw
41 Indicator pin
42 On-Off indicator
43 Button
44* O-ring
45 Spring
46 Gasket
Key Description
47 Casing
48 Screw
49 Minimum pressure adjusting screw
50 Maximum pressure adjusting nut
51 Pipe assembly
52 Washer
53 Spring
54 Spring
55 Lower spring holder unit
56 Seeger ring
57 Stem unit
58 Spring
59 Plate holding stem unit
60 Top cover (Body for type OS/84X-R and OS/88X-R)
61 Lower cover (Plug for type OS/84X-R and OS/88X-R)
62* Diaphragm
63 Screw
64 Block
65* O-ring
66* Gaco ex
67* O-ring
68 Piston
69 Locknut
70 Nut
71 Microswitch
73* Gasket (only for BP, BPA-D, MPA-D)
74 Filter
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
slam-shut valve or slam-shut controller and its serial number.

BM6X Series
14
Figure 7. BM6X Series Slam-Shut Valve
SCHEMATIC ASSEMBLIES
LM/1375
10
8
4
11
56
33 32
B
8
7
3
7
5
13
30
17
16
15
14
43
31
18 19
9
31
1
B
2
3 4
SECTION A-A
B
P
A
12
UPSTREAM DOWNSTREAM

BM6X Series
15
Figure 7. BM6X Series Slam-Shut Valve (continued)
SECTION B-B
BM6X/200 ANSI 150 DETAIL BM6X/150 ANSI 150 DETAIL
28 29
27
2526
18 18 16
1
34
35
17
24
A
21
22
23
20 A
C
LM/1375
TYPE C
BM6X/80 Min. 1 mm - Max 3 mm
BM6X/100 Min. 1 mm - Max 5 mm
BM6X/150 Min. 3 mm - Max 8 mm
BM6X/200 Min. 5 mm - Max 10 mm
BM6X/250 Min. 6 mm - Max 11 mm
BM6X/300 Min. 8 mm - Max 13 mm
Table 7. Shutter Position Dimensions BM6X

BM6X Series
16
R
E
M
E
M
R
A
I
R
E
G
N
R
G
C
E
Y
M
E
T
E
S
ON
E
R
OFF
OS-80X
O
E
N
Z
A
6
2
3
5
4
7
15
8
1
9
10
71
12 11
2220 21
19
18
17
1314
40
Figure 8. OS/80X-R Slam-Shut Controller Reinforced Version
LM/1389
DETAIL OF TYPE OS/80X-R WITH
MICROSWITCH
SECTION D-D
SECTION C-C

BM6X Series
17
Figure 8. OS/80X-R Slam-Shut Controller Reinforced Version (continued)
LM/1389
OMT
24
31
32
28
A
A
27 26
3435
36
38 3722
B
30
46
B
C
A
4544
60
29
41 42 19 18 43
47 48 49 50 51
52
53
54
52
55
56
58
57
59
61
62
C
26
48
69
70
33
73
D D
39
SECTION B-B
SECTION A-A

BM6X Series
18
Figure 8. OS/80X-R Slam-Shut Controller Reinforced Version (continued)
LM/1389
62 61
34 59 63
65 34 59 63 64 60 62 61
6465 60
27
34 59 63
64
34 59 63 64 60
6660
27
65 62 61
67
61
68
34 59 63 64 60 66 67
61
74 74
74
73
68
73
27
TYPE OS/80X-APA-D-R DETAIL TYPE OS/80X-MPA-D-R DETAIL
TYPE OS/80X-BPA-D-R DETAIL TYPE OS/84X-R DETAIL
TYPE OS/88X-R DETAIL

BM6X Series
19

BM6X Series
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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 specications 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.
© O.M.T. Ofcina Meccanica Tartarini s.r.l., 2010; All rights reserved
For further information visit: www.emersonprocess.com/regulators
Natural Gas Technologies
Emerson Process Management
Regulator Technologies, Inc.
O.M.T.
Ofcina Meccanica Tartarini s.r.l.
Via P. Fabbri, 1
I - 40013 Castel Maggiore (Bologna), Italy
Tel. : +39 - 0514190611
Fax: +39 - 0514190715
E-mail: [email protected]
Natural Gas Technologies
Emerson Process Management
Regulator Technologies, Inc.
Francel SA
Z.A. La Croix Saint Mathieu
28320 Gallardon
France
Tél. : [phone]
Fax : [phone]