3L.P. GAS ICN User manual

SLSL
SLSL
SLAM-SHUT VAM-SHUT V
AM-SHUT VAM-SHUT V
AM-SHUT VALAL
ALAL
ALVEVE
VEVE
VE
ICNICN
ICNICN
ICN
TECHNICAL MANUAL MT065
INSTALLATION, COMMISSIONING AND MAINTENANCE INSTRUCTIONS

2
3L.P. GAS s.r.l. TECHNICAL MANUAL ICM
PRECAUTIONS
GENERAL PRECAUTIONS
- The apparatus described in this manual is a device
subject to pressure installed in systems under
pressure;
- the apparatus in question is normally installed in
systems for transporting flammable gases (natural
gas, for example).
PRECAUTIONS FOR THE OPERATORS
Before proceeding with installation, commissioning or
maintenance, operators must:
- examine the safety provisions applicable to the
installation in which they must work;
- obtain the authorisations necessary for working
when so required;
- use the necessary means of individual protection
(helmet, goggles, etc.);
- ensure that the area in which they operate is fitted
with the means of collective protection envisaged
and with the necessary safety indications.
HANDLING
The handling of the apparatus and of its components
must only be carried out after ensuring that the lifting
gear is adequate for the loads to lift (lifting capacity
and functionality). The apparatus must be handled
using the lifting points provided on the apparatus
itself.
Motorised means must only be used by the persons in
charge of them.
INSTALLATION
If the installation of the apparatus requires the
application of compression fittings in the field, these
must be installed following the instructions of the
manufacturer of the fittings themselves. The choice
of the fitting must be compatible with the use specified
for the apparatus and with the specifications of the
system when envisaged.
COMMISSIONING
Commissioning must be carried out by adequately
trained personnel.
During the commissioning activities, the personnel not
strictly necessary must be ordered away and the no-
go area must be properly signalled (signs, barriers,
etc.). Check that the settings of the apparatus are those
requested; if necessary, reset them to the required
values in accordance with the procedures indicated in
the manual.
When commissioning, the risks associated with any
discharges into the atmosphere of flammable or
noxious gases must be assessed.
In installations in natural gas distribution networks, the
risk of the formation of explosive mixtures (gas/air)
inside the piping must be considered.
INDEX
1.0 INTRODUCTION
1.1 MAIN FEATURES
1.2 OPERATION
1.3 SLAM-SHUT SETTING SPRINGS
2.0 INSTALLATION
2.1 GENERAL
3.0 ACCESSORIES
3.1 “PUSH” THREE-WAYS SWITCH VALVE
4.0 START UP
4.1 GENERAL
4.2 GAS INPUT, CONTROL OF EXTERNAL
TIGHTNESS AND SETTING
4.3 CHECKING THE SETTING
5.0 TROUBLE-SHOOTING
5.1 ICN SLAM-SHUT
6.0 MAINTENANCE
6.1 GENERAL
6.2 ICN SLAM-SHUT VALVE MAINTENANCE PRO-
CEDURE
7.0 WEIGHT OF THE COMPONENTS
7.1 WEIGHT OF THE COMPONENTS IN KG
8.0 LIST OF RECOMMENDED SPARES

3
TECHNICAL MANUAL ICM 3L.P. GAS s.r.l.
1.0 INTRODUCTION
The scope of this manual is to provide the essential
information for the installation, commissioning and
maintenance of ICN slam-shut valves.
It is also appropriate to provide a brief illustration of
the main features of the valves and of its accessories.
1.1 MAIN FEATURES
This is a device wich immediately blocks the gas flow
if, following some kind of failure, the downstream
pressure reaches the set-point for its intervention or if
it is operated manually.
The main characteristics of the slam-shut device are:
• design pressure: 18.9 bar for all the components;
• intervention with pressure increase and/or
decrease;
• precision (AG): ± 1% of the pressure set-point for
pressure increases, ± 5% for pressure decreases;
• incorporated by-pass for balancing the pressures
and facilitating the resetting of the device;
• push-button manual control.
1.2 OPERATION
The slam.shut mechanism (Fig. 1) consists of:
• a mobile obturator A with sealing gaskets subject
to the load of the closing spring G;
• a lever assembly L whose rotation causes the
movement of the obturator A;
• a pressure switch device I-N whose internal motion
determines the open or closed position of the
obturator A.
The pressure switch device (Fig. 2) comprises a con-
trol head 11 in which the pressure to control Pa acts
on the diaphragm 21 which is integral with the shaft
with cams 18.
The load of the pressure Pa on the diaphragm is
contrasted by the springs 14 and 15, which respectively
determine intervention for a pressure increase or
decrease. The slam-shut device is set by adjusting
the rings 12 and 13.
The intervention value is increased by turning the rings
clockwise and vice versa when turned anticlockwise.
In the case of intervention for pressure increase, when
the Pa exceeds the setpoint, the load on the diaphragm
21 of the control head B increases until it overcomes
the resistance of the spring 14.
This provokes the downward displacement of the shaft
18 which shifts the feeler 19 and releases the lever
mechanism 20 by means of the cam 23.
Intervention for a pressure decrease takes place as
follows.
As long as the value of Pa stays above the set load of
the spring 15, the spring support 17 rests on support
16.
If the pressure Pa drops below the setpoint, the sup-
port of spring 16 stops its stroke on the beat of the
body 5 and the spring 15 displaces the support 17
upwards and the shaft 18 as a result. The cam 24 then
shifts the feeler 19 and causes the release of the lever
mechanism 20.
Intervention of the slam-shut device can also be
provoked manually by means of the release button
22. The connection between the control head 11 and
the Pa control point can be made with the intrposition
of a device “Push” Fig. 8 which makes it easy to control
the operation of the pressure control device.
Fig. 1
Fig. 2

4
3L.P. GAS s.r.l. TECHNICAL MANUAL ICM
1.3 TAB. 1 SETTING SPRINGS
rabmEGNARGNITTES
scitsiretcarahcgnirpS)3.giF(N-I)4.giF(N-I)4e3.giF(RT/N-I
edoCruoloCeDoLditixamnimxamnimxamnim
15650072ETIHW
5305
0.252.552.733÷3153÷71
25760072WOLLEY3.252.552.705÷5255÷03
30280072EGNARO5.200.500.758÷0458÷54
40190072DER7.200.600.8541÷56541÷56
55301072NEERG0.352.552.7081÷001081÷001
60411072KCALB2.305.405.6072÷051072÷051
75521072EULB5.305.405.6053÷002053÷002
80831072YERG7.352.452.6 0051÷007
95251072NWORB0.405.405.6055÷003055÷0030002÷009
015461072TELOIV2.400.400.6009÷005009÷0050082÷0031
115602072ERUZA0.505.400.60021÷0580021÷058
0005÷0052
218330072ETIHW
5305
3.157.857.01
91÷532÷8
317730072WOLLEY5.105.805.01
05÷5105÷02
414640072EGNARO7.105.805.01
001÷54001÷54
513150072DER0.205.805.01
041÷07041÷07
613170072NEERG3.205.805.01
072÷021072÷021
710570072KCALB5.200.652.8
006÷052006÷0520051÷051
810890072EULB0.300.600.8009÷005009÷0050012÷0001
910811072NWORB5.352.652.8 0072÷0081
Fig. 3 Fig. 4
De = Ø external diameter d= Ø wire diameter i= active coils
Lo = spring length it = total coils

5
TECHNICAL MANUAL ICM 3L.P. GAS s.r.l.
2.0 INSTALLATION
2.1 GENERAL
Before installing the valve, you must ensure that:
a) the valve can be inserted into the space provided
and that it is sufficiently accessible for subsequent
maintenance operations;
b) the piping upstream and downstream are at the
same level and able to support the weight of the
valve;
c) the inlet/outlet flanges of the piping are parallel;
d) the inlet/outlet flanges of the valve are clean and
the valve itself has not been damaged during
transport;
e) the piping upstream has been cleaned with the
removal of residual impurities such as welding slag,
sand, paint residues, water; etc.
The normally recommended set-ups are:
Fig. 5

6
3L.P. GAS s.r.l. TECHNICAL MANUAL ICM
When the above controls have been carried out, the
valve can be fitted in line, making sure that the body
is oriented so that the flow is in the direction shown by
the arrow impressed on the body itself.
For proper regulation, it is indispensable for the
downstream sensing line to be connected to a
rectilinear strech of the downstream piping itself with
a length in accordance with the Fig. 6 and 7 and with
a maximum gas speed at the take-off point not
exceeding 30 m/sec.
The following is recommended so as to prevent the
accumulation of impurities and condensate in the lines
of the pressure take-offs:
a) the piping itself must slope down towards the down-
stream connectors with a slope of about 5 - 10%;
b) the connectors on the piping must always be wel-
ded on the top of the piping itself and there must
be no burr or inward protrusion in the hole in the
piping.
N.B. DO NOT PTU ON/OFF VALVES ON THE
IMPULSE TAKE-OFFS
The most common types of installation for the ICN
cut-off device are shown in figures 6 and 7.
Figure 6 shows installation in a pressure regulation
line, figure 7 shows installation on a generic trunk.
Fig. 6
Fig. 7
V1 Upstream on-off valve
1Gas safety cut-off device Fig. 7
2Pressure regulator with built-in cut-off device Fig. 6
3Pilot
4Upstream pressure gauge
5Downstream pressure gauge
6Downstream bleed valve
V2 Downstream on-off valve

7
TECHNICAL MANUAL ICM 3L.P. GAS s.r.l.
3.0 ACCESSORIES
3.1 “PUSH” THREE-WAYS SWITCH VALVE
(FIG. 8)
The “Push” is a special spring three-ways switch val-
ve. When the knob is in the “rest” position, the angular
A and B ways are in comunication while the C way is
excluded. With the knob pressed down in the “check”
position, the A and C way are connected and the B
way excluded. When thrust is taken off the knob, the
connection between A and C is AUTOMATICALLY
REESTABLISHED by means of the spring pos. 11.
With the steam in the middle “open” position, the three
ways are all in communication with each other. This
cock is normally installed in the impulse lines of safety
devices for protection against pressure increases and/
or decreases (SAV and SBV) in order to allow very
rapid verification of the settings without disconnec-
ting the impulse pipes themselves during periodical
checking operations. Its particular feature lies in the
fact that, during normal running, the head (or the pilot
of safety valve) receives the signal of the pressure to
be kept under control through the A and B ways; when
testing, the head receives the signal of a CONTROL-
LED PRESSURE from the A and C ways; once the
check has been carried out, when the knob returns to
the “rest” position, the connection is automatically re-
established between the safety device head and the
environment with the pressure to be controlled, thus
avoiding the risk to shut off the safety device itself as
it would in the case of a normal, manually-operated
threeway cock, due to a trivial oversight. In other
words, the “Push” is a SECOND SAFETY DEVICE
which ensures the NON EXCLUSION of the main
safety device and allows for its “Fool-proof”
PERIODICAL CHECKING.
The stem is fitted with a stroke limit pin which makes
it possible to:
- connect A and C ways only when the pin enters the
“check” slot;
- connect the three ways, a, B and C, when the pin is
on “open”.
4.0 START UP
4.1 GENERAL
After installation, check that the inlet/outlet on/off
valves, any by-pass and the bleed cock are closed.
Before commissioning, you must ensure that the
conditions of use comply with the characteristics of
the apparatuses.
These characteristics are recalled by the symbols on
the specification plates applied to each apparatus.
We recommend actuating the opening and closing
valves very slowly. The valve could be damaged by
operations which are too fast.
APPARATUS SPECIFICATION PLATES
The list of symbols used and their meanings are listed
below:
Pemax = maximum operating pressure at the inlet of
the apparatus
Pzul = maximum pressure which can be supported by
the structure of the body of the apparatus in safety
conditions
AG = intervention accuracy
Wao = range of intervention for the over pressure of
slam-shut, relief and safety valves and accelerators
which can be obtained using the setting spring fitted
at the moment of testing. In piloted safety valves, the
pilot is considered as a separate apparatus with its
own setting range Wao
Who = range of intervention for the over pressure of
slam-shut, relief and safety valves and accelerators
which can be obtained using the setting springs
indicated i the tables. In piloted safety valves, the pilot
is considered as a separate apparatus with its own
setting range Who
Wau = range of intervention for pressure decrease of
sla-shut which can be obtained using the setting
springs indicated in the tables.
Fig. 8

8
3L.P. GAS s.r.l. TECHNICAL MANUAL ICM
4.2 GAS INPUT, CONTROL OF EXTERNAL
TIGHTNESS AND SETTING
External tightness is guaranteed if no bubbles form
when a foam medium is applied on the element under
pressure.
The slam-shut valves are normally supplied already
set for the desired setpoint. It is possible for various
reasons (e.g., vibration during transport) for the
settings to be changed while remaining within the
values permitted by the springs used.
We therefore recommend checking the settings using
the procedures illustrated below.
Before commissioning the valves you must check
that all the on-off valves (inlet, outlet, any by-pass)
are closed and that the gas is a temperature which
will not lead to malfunction.
4.3 CHECKING THE SETTING
Check and adjust the intervention of the slam-shut
1 as follows:
A) For slam-shuts connected to the downstream piping
by a three-way deviator “push” valve proceed as
follows (Fig. 9):
- connect a controlled auxiliary pressure to C;
- stabilise this pressure at the notch, pressing the knob
1 completely;
- reset the slam-shut device by means of the provided
lever;
- keep the knob 1 pressed:
a) safety devices which intervene for maximum
pressure: slowly increase the auxiliary pressure and
check the intervention value. If necessary, increase
the intervention value by turning the adjustment ring
12 clockwise, or anticlockwise to reduce the
intervention value.
b) safety devices which intervene for pressure
increase and reduction: slowly increase the auxiliary
pressure and record the intervention value. restore the
pressure to the setpoint established for the regulator,
and carry out the slam-shut reset operation.
Check intervention for pressure reduction by slowly
reducing the auxiliary pressure.
If necessary, increase the intervention values for
pressure increase or decrease by respectively turning
the rings 12 and 13 clockwise and vice versa to redu-
ce the intervention values.
- check proper operation by repeating the operations
at least 2-3 times.

9
TECHNICAL MANUAL ICM 3L.P. GAS s.r.l.
B) On devices without the “push” valve (Fig. 10) we recommend connecting the control head separately to a
controlled auxiliary pressure and repeating the operations described above.
Fig. 9
Fig. 10

10
3L.P. GAS s.r.l. TECHNICAL MANUAL ICM
ATTENTION
At the end of the operation,
reconnect the control head
to the downstream pressure take-off.
N.B.: The intervention tests should be repeated at
least every 6 months.
At the end of the slam-shut check, proceed as
follows:
1) check that the slam-shuts is in the closed position;
2) open the inlet on/off valve V1;
3) very slowly open the slam-shut by turning the
provided lever.
5.0 TROUBLE-SHOOTING
The problems of various kinds which could arise over
time are highlighted below.
They derive from phenomena associated with the
conditions of the gas as well, of course, as the natural
ageing and wear of the materials.
It must be remembered that all operations on the
apparatuses must be carried out by highly qualified
personnel with appropriate knowledge of the subject.
Tampering with the apparatuses by unsuitable
personnel relieves us from all responsability of any
kind.
You must therefore train your maintenance personnel
or avail of the service centres officially authorised by
us.
5.1 TAB. 2 ICN SLAM-SHUT (Fig. 11-12)
N.B. If the slam-shut has intervened, close the inlet
and outlet valve (V1 and V2) on the line and discharge
the pressure before carrying out any operation.
Eliminate the causes which gave rise to
intervention before reactivating it.
In the event of operating problems when personnel
qualified for a specific operation are not available, call
the nearest service centre.
MELBORPSESUACELBISSOPYDEMER
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rotalugerehtedistuoylbmessaeht

11
TECHNICAL MANUAL ICM 3L.P. GAS s.r.l.
6.0 MAINTENANCE
6.1 GENERAL
Before carrying out any operation it is important to
ascertain that the valve has been cut off both upstream
and downstream and that the pressure has been
discharged in the sections of piping between the val-
ve and the on/off valves.
The maintenance operations are closely associated
with the quality of the gas transported (impurities,
humidity, gasoline, corrosive substances) and with the
efficiency of the filtering.
Preventive maintenance should be carried out at
intervals which, if not established by regulations,
depend on:
- the quality of the gas transported;
- The cleanliness and conservation of the piping
upstream from the valve: in general, for example,
when starting the equipment for the first time, more
frequent maintenance is required because of the
precarious state of cleanliness inside the piping;
- the level of reliability required from the regulation
system.
Before starting the disassembly operations on the
apparatus you should check that:
- a set of recommended spares is available. The
spares must be original 3L.P.GAS ones, bearing in
mind that the more important ones such as
diaphragms are marked
The use of non-original components relieves us of all
responsibility.
- A set of wrenches is available as specified in table
3.
If the maintenance is carried out by your own
authorized personnel, we recommend putting
reference markings before the disassembly on those
parts which could have directional or reciprocal
positioning problems when reassembling.
Finally, we would remind you that O-rings and sliding
mechanical components (rods, etc. ...) must be
lubricated, before the reassembly, with a layer of sili-
cone grease.

12
3L.P. GAS s.r.l. TECHNICAL MANUAL ICM
6.2 ICN SLAM-SHUT VALVE MAINTENANCE PROCEDURE
Fig. 11

13
TECHNICAL MANUAL ICM 3L.P. GAS s.r.l.
Fig. 12
Procedure for disassembly. complete replace-
ment of the spare parts and reassembly of the
ICN slam-shut valve (PROGRAMMED PREVENTI-
VE MAINTENANCE)
PRELIMINARY OPERATIONS
A. Render the valve safe;
B. Ensure that the pressure upstream and
downstream from it is 0.
DISASSEMBLY
(The position refer to Fig. 11-12)
1) Slacken and remove the fixing screws, pos. 46, in
the flange slam-shut valve, pos. 14.
2) Remove the flange slam-shut valve pos. 14.
3) Remove the obturator support of the slam-shut
valve, pos. 12, along with the spring, pos. 42, and
the obturator, pos. 10.
4) Check and clean the inside of the valve body.
5) Carefully check that the valve seat, pos. 7, is in a
good state.
6) Disconnect the sensing line which connects the
pressure control of the slam-shut to the downstream
piping, unscrewing the taper seal connections.
7) Slacken the fixing screws, pos. 42, of the slam-
shut cover, pos. 17.
8) Remove the slam-shut cover, pos. 36.
9) Remove the retaining ring, pos. 52, which fixes the
reset lever, pos. 36.
10) Remove the reset lever, pos. 36.
11) Remove the retaining ring, pos. 42.
12) Slacken and unscrew the screws, pos. 40.
13) Remove the pressure control from the value body.
14) Unscrew and remove the shaft guide, pos. 33.
15) Replace all the components included in the
spare parts list.

14
3L.P. GAS s.r.l. TECHNICAL MANUAL ICM
RE-ASSEMBLY
Remembering that the O-rings and the sliding
parts (rods, etc.) must be lightly lubricated with a
fine layer of silicone grease before reassembly,
while static parts require grease to render them
softer but, especially, to hold them in their slots:
16) Fix the shaft guide, pos. 33, to the valve body.
17) Fit the pressure control back on the valve body.
18) Secure this by screwing in the screws, pos. 40.
19) Put back the retaining ring, pos. 52.
20) Position the reset lever, pos. 36.
21) Put back the retaining ring, pos. 52.
22) Put back the slam-shut cover, pos. 17.
23) Fix the screws, pos. 42, of the slam-shut cover,
pos.17.
24) Reconnect the sensing line which connects the
pressure control of the slam-shut to the
downstream piping, and fix the taper seal
connections.
25) Put back the slam-shut obturator support, pos.
12, along with the spring, pos. 42, and the
obturator pos. 10.
26) Fit back the slam-shut flange, pos. 14 and fix the
screws pos. 46.
CHECKING THE TIGHTNESS AND SETTING
27) Very slowly open the on/off valve upstream from
the slam-shut and using a foam solution or the
like check:
• the tightness of the external surfaces of the
slam-shut;
• the tightness of the slam-shut;
• the tightness of the internal surfaces of the slam-
shut;
• the tightness of the fittings.
28) Operating very slowly, turn the reset lever, pos.
36, of the slam-shut from the vertical position
towards the horizontal position until only the
internal by-pass is opened. Then raise the lever
completely to the re-engage position.
START UP
29) Very slowly open the downstream on/off valve.

15
TECHNICAL MANUAL ICM 3L.P. GAS s.r.l.
Tab. 3 MAINTENANCE WRENCHES FOR ICN SLAM SHUT VALVE
epyTDN¼"1dna"1"2dna½"1"3dna½"2"4"6"8
A
.hC32-91-31-832-91-71-832-91-71-842-91-822-91-822-91-8
B
.L003
D
.hC72-01
E
.hC5-4
L
.doC9909997
M
Ø06÷91
O
.doC540999774099979409997

16
3L.P. GAS s.r.l. TECHNICAL MANUAL ICM
7.0 WEIGHT OF THE COMPONENTS
7.1 Tab. 4 WEIGHT OF THE COMPONENTS
IN KG.
1
¼"1 ½"1"2½"2"3"4"6"8
4,13,23,24,34,35,017,918,62
1,01,01,01,01,02,03,03,0
3,04,04,01125,41,7
015,416,615,525,638409841
8,03,122 57,54,01613,22

17
TECHNICAL MANUAL ICM 3L.P. GAS s.r.l.
8.0 LIST OF RECOMMENDED SPARES
ICN/... SLAM-SHUT VALVE

18
3L.P. GAS s.r.l. TECHNICAL MANUAL ICM

19
TECHNICAL MANUAL ICM 3L.P. GAS s.r.l.
SECEIPFOREBMUN
.SOPNOITPIRCSED"3÷"1"8÷"4
NCI
01 rotarutbO11
53 UgnilaeS11
55 gnirediuG1-
26 gnir-OgnilaeS2-
36 gnir-OgnilaeS1-
66 gnir-OgnilaeS1-
86 gnir-OgnilaeS2-
28 gnirediuG-1
58 gnir-OgnilaeS-2
78 gnir-OgnilaeS-2
19 gnir-OgnilaeS-1
29 gnir-OgnilaeS-1
.SOPNOITPIRCSEDSECEIPFOREBMUN
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8* teksaG2
92 mgarhpaiD1
74* UgnilaeS1
05 gniR-O1
35 gniR-O1
rofylnO* WGVD noisrev

20
3L.P. GAS s.r.l. TECHNICAL MANUAL ICM
WHEN ORDERING SPARE PARTS, PLEASE SPE-
CIFY:
Type of valve
Dne (nominal inlet diameter)
Type of head for slam-shut (I-N, I-N/TR)
Works no. (Serial no.)
Year of manufacture
Type of fluid used
The no. of the part (position no.)
Quantity desired