Emerson BM6X Series User manual

Instruction Manual
D103664X012
August 2018
BM6X Series
SUMMARY
Introduction ........................................................................ 1
PED Categories and Fluid Group ...................................... 2
Characteristics ................................................................... 2
Labelling ............................................................................ 2
Overpressure Protection .................................................... 2
Transport and Handling ..................................................... 3
Atex Requirements ............................................................ 3
Slam-Shut Controller ......................................................... 4
Dimensions and Weights ................................................... 5
Operation ........................................................................... 6
Installation ......................................................................... 7
Startup ............................................................................... 8
Slam-Shut Controller Adjustment ...................................... 9
Shutdown ........................................................................... 9
Maintenance ...................................................................... 9
Slam-Shut Controller Maintenance ....................................10
Spare Parts ........................................................................12
Troubleshooting .................................................................12
Parts Lists ..........................................................................13
Schematic Assemblies .......................................................14
INTRODUCTION
Scope of the 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 and
are used in natural gas reduction, distribution and
transfer stations.
This product has been designed to be used with fuel gases
of 1st and 2nd family according to EN 437, and with other non
aggressive and non fuel gases. For any other gases, other
than natural gas, please contact your local sales agent.
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
shall be used additional pressure accessories (e.g. controller
or lters) manufactured and labeled by Emerson.
Emerson will not be responsible for any possible inefciency
due to installation of non Emerson production additional
pressure accessories.
When pressure containing parts of safety slam-shut device
(SSD) valve and controller have different maximum allowable
pressures (PS), the SSD is the 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 Pressure Equipment
Directive PED 2014/68/UE.
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 PED 2014/68/UE categories.
Table 1. PED 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
Types OS/80 and OS/80-X) conform to Pressure Equipment
Directive PED 2014/68/UE Article 4 section 3 and were
designed and manufactured in accordance with sound
engineering practice (SEP).
Per Article 4 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 angeless
!
WARNING
Maximum Operating Inlet Pressure(1)(2)
ANSI 150: 20 bar
ANSI 300: 50 bar
ANSI 600: 100 bar
Overpressure Set Range
0.03 to 80 bar
Underpressure Set Range
0.01 to 80 bar
Minimum/Maximum Allowable Temperature (TS)(1)
See label.
1. The pressure/temperature limits indicated in this instruction manual or any
applicable standard or code limitation should not be exceeded.
2. At average ambient temperature.
Functional Features
Accuracy Class AG : ± 1%
Response Time ta : ≤ 1 second
Temperature
Standard Version: Working -10° to 60°C
Low Temperature Version: Working -20° to 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
xxxx
body
Notified
Note 1
Note 2
Note 4Note 5
Note 3
BOLOGNA ITALY
APPARECCHIO TIPO / DEVICE TYPE
DN2
DN1
bar
bar
bar
bar
PS bar x PS barPSD PT=Bar
pdo
bar DN sede
DN seat
Wds
Wdso
Wdsu
FAIL CLOSE
FAIL OPEN
TARTARINI
MATRICOLA / ANNO
SERIAL Nr. / YEAR
REAZIONE
FAIL SAFE MODE
NORME ARMONIZ.
HARMONIZED STD.
CLASSE DI PERDITA
LEAKAGE CLASS
CLASSE FUNZIONALE
FUNCTIONAL CLASS
FLUIDO GRUPPO
FLUID GROUP
EN
TIPO
TYPE
Cg
TS °C
pmax
/
1
1.5
TM
Figure 2. Label for BM6X Series Slam-Shut Valves
Note 1: See “Characteristics”
Note 2: Year of manufacture
Note 3: Class A or Class B
Only valves with overpressure and underpressure
settings can be classied in Class A.
Note 4: Class 1: -10°/60°C
Class 2: -20°/60°C
Note 5: 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 also be 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 be protected by shocks or
anomalous stresses.
ATEX REQUIREMENTS
Application of ATEX Product Directive:
Table 2. Overview
TYPE CLASSIFICATION ATEX
ASSEMBLIES
ATEX
LABELLING
Regulator/SSD Non-electrical
equipment
Not falling under
the 2014/34/EU
Directive
No
Regulator/SSD
+
electrical device
Non-electric
equipment equipped
with an electrical
device falling under
the scope of the
ATEX Directive
2014/34/EU
Constitutes
an assembly
according to
the 2014/34/EU
Directive
II 2 G T
!
WARNING
Carefully follow below instructions for the
usage of “ATEX Assembly” in an
explosive atmosphere.
A non-electrical equipment incorporating an electrical device
(proximity, microswitch...) is an “ATEX Assembly”, and in the
scope of the ATEX Directive 2014/34/EU.
When such equipment(s) is used in a natural gas pressure
control and/or measuring station in compliance with the
following European standards: EN12186, EN12279 and
EN 1776, can be installed in any type of classied zones
according to the Directive 1999/92/EC dated 16 December
1999, in the following conditions:
a) the equipment(s) / electrical circuit is connected to
a suitable and certied intrinsically safe apparatus
(suitable zener barrier)
b) the equipment(s) / electrical circuit is used according
to this instruction manual issued by the manufacturer
and / or available on our website
ATEX Labelling
The nameplate will be installed on the ATEX assembly.
TIPO
TYPE
MATRICOLA
SERIAL NR.
BOLOGNA ITALY
ANNO
YEAR
DESTINAZIONE D’USO
INTENDED USE
II 2 G T
Figure 3. Label for ATEX Assembly
Where:
• Manufacturer: Name and address and/or logo of the
manufacturer
• : Conformity marking to European Directive
• Type: Description of the ATEX Assembly
• Serial Number and Year of Construction
• : Specic marking of explosion protection
• II: Equipment group
• 2: Equipment Category/level of protection 2 = suitable for
zone 1
• G: For gases, vapour or mists
• T: Temperature Class (i.e.: T6 > 85 … ≤ 100 °C)
• Intended Use: Natural Gas infrastructures

BM6X Series
4
SLAM-SHUT CONTROLLER
The BM6X Series slam-shut valves are equipped with the Type OS/80X-R or OS/80X-R-PN slam-shut reinforced version controller. The
controllers are supplied in different models according to set ranges required.
Figure 4. Type OS/80X-BP-R Slam-Shut Controller
Table 3. Characteristics for Type OS/80X-R Spring Loaded Pneumatic Slam-Shut Controller
Table 4. Characteristics for Type OS/80X-R-PN Pneumatic Slam-Shut Controller with Type PRX Pilot
TYPE 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 Aluminum
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
TYPE
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 Aluminum
OS/84X-R-PN 100 30 80 30 80 Brass
Type OS/80X-R-PN: Pressure range 0.5 to 40 bar
Appliance made of a Type OS/80X-APA-D-R set at about 0.4 bar and a variable number of Types PRX/182-PN pilots for overpressure and PRX/181-PN for
underpressure, as many as necessary to control different points of the installation.
Type OS/84X-R-PN (Safety Accessory): Pressure range 30 to 80 bar
Appliance made of a Type OS/84X-R set at about 20 bar and a variable number of Types PRX-AP/182-PN pilots for overpressure and PRX-AP/181-PN 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 5. BM6X Series Dimensions
Table 5. BM6X Series Dimensions (mm)
Table 6. 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 38 71 111
ANSI 300 26 40 73 115
ANSI 600 15 33 45 77 121
DIMENSIONS AND WEIGHTS

BM6X Series
6
Figure 6. BM6X Series Operational Schematic
OPERATION
The slam-shut valve can only be opened if the upstream and
downstream pressures are equal.
The Type 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
Type IT/2V by-pass valve
Controller
Reset shaftControlled pressure
Off-center butterfly shutter

BM6X Series
7
Figure 7. BM6X Series Connection/Installation Schematics
SLAM-SHUT VALVE WITH TYPE OS/80X-R CONTROLLER - INSTALLATION IN A LOW PRESSURE REGULATING LINE
SLAM-SHUT VALVE WITH TYPE 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
E
M
E
R
G
E
N
Z
A
R
I
A
R
M
O
R
E
S
E
T
E
M
E
R
G
E
N
C
Y
Type BM6X
MonitorRegulator
Type
PS/79-1
Type
PS/79-1
Regulator
OS-80X
ON
OFF
E
M
E
R
G
E
N
Z
A
R
I
A
R
M
O
R
E
S
E
T
E
M
E
R
G
E
N
C
Y
Type BM6X
Type
PS/79
Type
PS/79
Monitor
LS
B
A
Jet
(1 mm)
Type
PRX/182-PN
L
S
B
A
Type
PRX/181-PN

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 connections as shown in Figure 7. 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 relevant clauses 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 Type 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.
c. Using the appropriate lever, rotate shaft (B) in the
direction shown by the arrow stamped on the controller
cover so as to permit slam shut valve to open. Keep the
valve open manually.

BM6X Series
9
CAUTION
In case you note an excessive resistance
in the opening operation, possible ΔP
upstream/downstream can be the root cause:
repeat above step b to balance upstream and
downstream pressures.
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 Type BM6X
completely, then slowly open the valve downstream of
the regulator.
SLAM-SHUT CONTROLLER
ADJUSTMENT
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
sudden release of pressure, isolate the slam-
shut valve 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 to applicable codes.
MAINTENANCE
(SEE FIGURES 9 AND 10)
!
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).
Only for DN 200/250/300: Loosen screw (key 40), 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 Type 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 (keys 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 or equivalent, 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 (key 29) replace the
washers (key 22) and apply glue Loxeal 55-03, or
equivalent, to the screws (key 21).
!
WARNING
Check the dimension “C” value indicated on
Table 6. If is necessary adjust, through the
appropriate screw (key 20), the
shutter position.
C
Screw
(key. 20)
Figure 8. Type BM6X Shutter Position
Table 7. Type BM6X Shutter Position Dimensions
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
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 11)
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).

BM6X Series
11
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 lip seal 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 or equivalent.
!
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 (Type OS/80X-R 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.
Replacing O-ring (Types 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 lip seal (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 (keys 17 and 2),
rollers (key 10) and shim ring (key 15). Wash parts,
replace any if worn.
d. Remove nuts (key 18), levers (keys 20 and 36) and
springs (keys 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 (keys 53 and 54).
g. Remove cover (key 61) on Type OS/80X-R, 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 (keys 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
or equivalent.
Make sure to:
a. Narrow the gap between nuts (keys 30 and 18) so that
levers (keys 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).

BM6X Series
12
Table 8. 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
(Lip seal (key 66) on Types OS/84X-R
and 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
c. Now remount lever assembly (keys 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 (keys 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
13
PARTS LISTS
BM6X Series
Slam-Shut Valve
(See Figures 9 and 10)
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
22* Washer
23 Body
24 Shutter
25* Gasket
26 Ring
27 Shaft bracket
28 Pin
29 Shaft lever
30 Bracket
31 Screw
32 Label
33 Rivet
34 Spacer
35 Stud
37 Lever unit
38 Body ring
39 Ring
40 Screw
41 Stud bolt
42 Spring plug
43 Plug
44* O-ring
45* O-ring
OS/80X-R Series
Slam-Shut Controller
(See Figure 11)
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
47 Casing
Key Description
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 Elastic ring
57 Stem unit
58 Spring
59 Plate holding stem unit
60 Top cover
(body for Types OS/84X-R and OS/88X-R)
61 Lower cover
(plug for Types OS/84X-R and OS/88X-R)
62* Diaphragm
63 Screw
64 Block
65* O-ring
66* Lip seal
67* O-ring
68 Piston
69 Locknut
70 Nut
71 Microswitch
73* Gasket
(only for Types BP, BPA-D and 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 9. BM6X Series Slam-Shut Valve DN 80/100/150 Casting Version
SCHEMATIC ASSEMBLIES
10
8
4
11
56
33 32
B
8
7
3
7
5
13
30
17
16
15
14
37
31
18 19
9
31
1
B
2
3 4
B
P
A
12
28 29
27
2526
18
35
24
A
21
22
23
20 A
UPSTREAM DOWNSTREAM
SECTION A-A SECTION B-B
TYPE BM6X/150 ANSI 150 DETAIL

BM6X Series
15
Figure 10. BM6X Series Slam-Shut Valve DN 200/250/300 Machined Version
B
P
A
2
3
45
6
8
9
10
11
12
13 14
15
16
17
18 19 1
37
7
A
A
30 31
32
33
31
20
21
22
23
24
26
27
25
28
29
38
39 40
39
28
SECTION A-A

BM6X Series
16
Figure 10. BM6X Series Slam-Shut Valve DN 200/250/300 Machined Version (continued)
39
1
34
17
41
16
43
44
45
42
39 28
38
ANSI 150 DETAIL
TYPE BM6X/200 TYPE BM6X/250/300
TYPE BM6X/200 ANSI 150 DETAIL
TYPE BM6X/300 DETAIL
TYPE BM6X/250/300 DETAIL

BM6X Series
17
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 11. Type OS/80X-R Slam-Shut Controller Reinforced Version
DETAIL OF TYPE OS/80X-R WITH
MICROSWITCH
SECTION D-D
SECTION C-C

BM6X Series
18
Figure 11. OS/80X-R Series Slam-Shut Controller Reinforced Version (continued)
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
DD
39
SECTION B-B
SECTION A-A

BM6X Series
19
Figure 11. OS/80X-R Series Slam-Shut Controller Reinforced Version (continued)
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
Americas
McKinney, Texas 75070 USA
T [phone]
[phone]
Europe
Bologna 40013, Italy
T [phone]
Asia Pacic
Singapore 128461, Singapore
T [phone]
Middle East and Africa
Dubai, United Arab Emirates
T [phone]
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