Instruction Manual - Magnetrol International

B73 External Cage
®
Liquid Level Switches
INSTRUCTION MANUAL AND PARTS LIST
DESCRIPTION
B73 instruments are float operated liquid level controls
designed for external float cage mounting.
These instruments are ideally used for off-on liquid level
control, alarm and safety shut-down service in a wide variety of applications including large steam-electric generating
stations, oil refineries and chemical processing operations.
The B73 is available with either a carbon steel or stainless
steel float cage and is suitable for service pressure ratings
up to 20.7 bar (300 PSIG) and specific gravity ratings down
to 0.60.
OPERATING PRINCIPLE
A permanent magnet is attached to a pivoted switch mechanism. As the float rises following the liquid level, it raises
the magnet attractor into the field of the magnet, which in
turn snaps against the non-magnetic barrier tube, tilting the
switch mechanism. The barrier tube provides a static seal
between the switch mechanism and the float.
Switch
mechanism
Magnet
4
5
4
6
5
6
Enclosing tube
(non-magnetic)
Attraction
sleeve
Return spring
Swing in
position
Swing out
position
HL
Figure 1
Switch Tripped
LL
Figure 2
Switch Released
AGENCY APPROVALS
Agency
Approval ➀
CENELEC
EEx d IIC T6, explosion proof
EEx ia IIC T6, intrinsically safe➁
BASEEFA
Ex d IIC T6
CSA
➀
Class I, Div. 1, Groups C & D
Class II, Div. 1, Groups E, F & G
OPERATING CYCLE
As the liquid level rises in the chamber, refer to Figure 1,
the float moves the magnetic attraction sleeve up within the
enclosing tube and into the field of the switch mechanism
magnet. As a result, the magnet is drawn in tightly to the
enclosing tube causing the switch to trip, making or breaking an electrical circuit. As the liquid level falls, the float
drops and moves the attraction sleeve out of the magnetic
field, releasing the switch at a predetermined low level.
Refer to Figure 2. The tension spring ensures the return of
the switch in a snap action.
Non-Hazardous CSA Type 4X
Class I, Div. 2, Groups B, C & D
Class I, Div. 1, Groups B, C & D
Class II, Div. 1, Groups E, F & G
FM
➀
Non-Hazardous NEMA 4X
Class I, Div. 1, Groups C & D
Class II, Div. 1, Groups E, F & G
Class I, Div. 1, Groups B, C & D,
Class II, Div. 1, Groups E, F & G
SAA ➀
Ex d IIC T6 (IP65)
➀ Not available with all switches; Consult factory for proper
model numbers.
➁ Consult factory for proper model numbers.
MODEL IDENTIFICATION
A complete B73 switch, consists of 1 code:
MATERIALS OF CONSTRUCTION
1
2
4
Carbon steel cage with 316 SST float and 400 SST magnetic sleeve.
Carbon steel cage with 316 SST float, magnetic sleeve with 316 SST jacket.
316 SST cage and trim and float.
SIZE AND TYPE OF PROCESS CONNECTION
B
B
2 0
3 0
1" NPT threaded connection upper side/bottom
1" NPT socket weld connection upper side/bottom
N30
S30
NW 25 DIN FORM C (DIN 2526)
ND 16 (DIN 2533) ND 25 (DIN 2534)
▼ FLANGE TYPE & SIZE
▼ MOUNTING STYLE
▼
1" ANSI type
150 lbs
300 lbs
N40
1FA
1GA
flanged connection upper side/bottom
S40
1FB
1GB
flanged connection side/side
Switch mechanism and enclosure, refer to table below for pneumatic switch mechanisms and for
electric switch mechanisms.
complete code for B73 liquid float level switch
B 7 3
SELECT PNEUMATIC SWITCH MECHANISM & ENCLOSURE
Pneumatic switch
Max. supply pressure
Max. liquid temperature
Bleed orifice Ø
bar (PSIG)
°C (°F)
mm (inches)
mat'l. code 1
mat'l. code 2, 4
description
Series J bleed type
Series K non bleed type
Code (NEMA 3R encl.)
6.9 bar (100 PSIG)
200°C (400°F)
1.60 mm (0.063")
JDG
JDE
4.1 bar (160 PSIG)
200°C (400°F)
2.39 mm (0.094")
JEG
JEE
4.1 bar (160 PSIG)
230°C (450°F)
1.40 mm (0.055")
JFG
JFE
6.9 bar (100 PSIG)
200°C (400°F)
—
—
KOE
2.8 bar (140 PSIG)
200°C (400°F)
—
KOG
—
SELECT ELECTRIC SWITCH MECHANISM & ENCLOSURE ➁
All models with material of construction code 1
Switch
Description
Series A –
Max.
process
temp.
°C (°F)
③
Cont.
one
per
encl.
230°C
NEMA 4X
cast aluminium
NEMA 7/9
cast iron
1"
NPT
M 20
x
1.5
PG 16
1"
NPT
BASEEFA
cast iron
M20
x
1.5
3/4"
NPT
All models with material of construction codes 2 and 4
CENELEC
cast iron
M20
x
1.5
NEMA 4X
cast aluminium
3/4"
NPT
1"
NPT
M 20
x
1.5
PG 16
NEMA 7/9
cast iron
1"
NPT
BASEEFA
cast iron
M20
x
1.5
3/4"
NPT
CENELEC
cast iron
M20
x
1.5
3/4"
NPT
SPDT
AAP
A2P
A3P
AKR
AK8
AU8
AK7
AU7
AAQ
A2Q
A3Q
AKY
AK6
AU6
AK5
AU5
(450°F) DPDT
ADP
A8P
A9P
ANR
AN8
AX8
AD7
AW7
ADQ
A8Q
A9Q
ANY
AN6
AX6
AD5
AW5
Series B –
120°C
SPDT
BAP
B2P
B3P
BKR
BK8
BU8
BK7
BU7
BAQ
B2Q
B3Q
BKY
BK6
BU6
BK5
BU5
Snap switch
(250°F) DPDT
BDP
B8P
B9P
BNR
BN8
BX8
BD7
BW7
BDQ
B8Q
B9Q
BNY
BN6
BX6
BD5
BW5
Mercury switch
Series C –
230°C
SPDT
CAP
C2P
C3P
CKR
CK8
CU8
CK7
CU7
CAQ
C2Q
C3Q
CKY
CK6
CU6
CK5
CU5
Snap switch
(450°F) DPDT
CDP
C8P
C9P
CNR
CN8
CX8
CD7
CW7
CDQ
C8Q
C9Q
CNY
CN6
CX6
CD5
CW5
Series D –
Snap switch
for DC
current appl.
120°C
SPDT
(250°F)
–
–
–
–
–
–
–
–
DAQ
D2Q
D3Q
DKY
DK6
DU6
DK5
DU5
DPDT
–
–
–
–
–
–
–
–
DDQ
D8Q
D9Q
DNY
DN6
DX6
DD5
DW5
Series E –
Vibration
resistant
mercury switch
230°C
SPDT
(450°F)
EAP
E2P
E3P
EKR
EK8
EU8
EK7
EU7
EAQ
E2Q
E3Q
EKY
EK6
EU6
EK5
EU5
DPDT
EDP
E8P
E9P
ENR
EN8
EX8
ED7
EW7
EDQ
E8Q
E9Q
ENY
EN6
EX6
ED5
EW5
Series F –
Snap switch
hermetically
sealed
230°C
(450°F) SPDT
DPDT
FAP
FDP
F2P
F8P
F3P
F9P
FKR
FNR
FK8
FN8
FU8
FX8
FK7
FD7
FU7
FW7
FAQ
FDQ
F2Q
F8Q
F3Q
F9Q
FKY
FNY
FK6
FN6
FU6
FX6
FK5
FD5
FU5
FW5
Series HS –
Snap switch
hermetically
sealed with
terminal block
230°C
SPDT
(450°F)
–
–
–
–
–
–
–
–
HM2
H7A
H6A
HS3
HB1
HB2
HB3
HB4
DPDT
–
–
–
–
–
–
–
–
HM6
H7C
H6C
HS7
HB5
HB6
HB7
HB8
➁
2
Series U –
120°C
SPDT
UAP
U2P
U3P
UKR
UK8
UU8
UK7
UU7
UAQ
U2Q
U3Q
UKY
UK6
UU6
UK5
UU5
Snap switch
(250°F) DPDT
UDP
U8P
U9P
UNR
UN8
UX8
UD7
UW7
UDQ
U8Q
U9Q
UNY
UN6
UX6
UD5
UW5
Series W –
Snap switch
hermetically
sealed
230°C
SPDT
(450°F)
WAP
W2P
W3P
WKR
WK8
WU8
WK7
WU7
WAQ
W2Q
W3Q
WKY
WK6
WU6
WK5
WU5
–
–
–
–
–
–
–
–
WDQ
W8Q
W9Q
WNY
WN6
WX6
WD5
WW5
Series X –
Snap switch
hermetically
sealed
230°C
SPDT
(450°F)
XAP
X2P
X3P
XKR
XK8
XU8
XK7
XU7
XAQ
X2Q
X3Q
XKY
XK6
XU6
XK5
XU5
–
–
–
–
–
–
–
–
XDQ
X8Q
X9Q
XNY
XN6
XX6
XD5
XW5
Housing heater and drain available in option. Consult factory for proper
model numbers.
③
DPDT
DPDT
Max. Process temperatures are based on 38°C (100°F) ambient temperature.
INSTALLATION
CRITICAL ALARM FUNCTION
cable entry
It is recommended that for critical alarm functions, an additional level switch be installed as a high-high or low-low
level alarm for maximum protection.
Pressure
vessel
Switch
actuating
level
reference
marks
Shutoff
valve
PIPING
Figure 3 shows a typical piping installation of a Magnetrol
level switch to a pressure vessel. Reference mark on float
chamber should be aligned to correspond with liquid level
in vessel at which switch control is desired.
Use pipe of sufficient strength to support the control. If necessary, provide a stand or hanger to help support its
weight. All piping should be straight and free of “low spots”
or “pockets” so that lower liquid line will drain towards the
vessel and upper vapor line will drain toward the control.
Shut-off valves are recommended for installation between
the vessel and the control. If control is to be used with a
lower temperature liquid (one which will “boil” in the float
chamber if outside heat is absorbed), the chamber and piping should be insulated. Such boiling in the chamber will
cause false level indications. DO NOT INSULATE SWITCH
MECHANISM HOUSING.
On controls equipped with pneumatic switch assemblies,
consult bulletin on mechanism furnished for air (or gas) piping instructions. Refer to chart on this page for bulletin numbers for pneumatic switches.
Max
305 mm
Drain
valve
Figure 3
MOUNTING
Adjust piping as required to bring control to a vertical position. Magnetrol controls must be mounted within three (3°)
degrees of vertical. A three degree slant is noticeable by
eye, but installation should be checked with a spirit level on
top and/or sides of float chamber.
Controls should be mounted as close to the vessel as possible. This will result in a more responsive and accurate
level change in the control. Liquid in a long line may be
cooler and more dense than liquid in the vessel causing
lower level indication in the control than actual level in the
vessel.
WIRING
Most mechanical control switch housings are designed to
allow 360° positioning of the cable entries by loosening the
set screw(s). See figure 4. On high temperature applications (above 120° C [250° F]), high temperature wire should
be used between control and first junction box located in a
cooler area.
1. To gain access to switch mechanism(s) remove switch
housing cover. (See CAUTION next page.)
2. Pull in supply wires (conductors), wrap them around
enclosing tube under the baffle plate and connect to
proper terminals. Be certain that excess wire does not
interfere with "tilt" of switch and that adequate clearance
exists for replacement of switch housing cover.
NOTE: See bulletin on switch mechanism furnished with
your control (as listed below) for proper connections.
3. Connect power supply to control and test switch action
by varying liquid level in tank or vessel.
CAUTION:
In hazardous area, do not power the unit until
the cable gland is sealed and the enclosure
cover is screwed down securely.
NOTE: If switch mechanism fails to function properly, check
vertical alignment of control housing and consult installation
instructions in switch mechanism bulletin.
4. Replace switch housing cover and place control into service.
NOTE: If control has been furnished with an explosion proof
(cast) or moisture proof (gasketed) switch housing, check
the following:
– After wiring connections have been completed, housings
must be sealed via the correct cable gland to prevent
entrance of air.
– Check cover to base fit, to be certain gasketed joint is
tight. A positive seal is necessary to prevent infiltration of
moisture laden air or corrosive gases into switch housing.
Switch mechanism
Bulletin
Mercury switches
42-783
A
Dry contact switches
42-683
B, C, D, U, W, X
Anti-vibration dry contact switches
42-684
G, H, I
Bleed type pneumatic valve
42-685
J
Non-bleed type pneumatic valve
42-686
K
Anti-vibration mercury switches
Reference series
E
3
WIRING (cont.)
OBSERVE ALL APPLICABLE ELECTRICAL CODES AND PROPER WIRING PROCEDURES
CENELEC/BASEEFA
NEMA 4x
Set screw
Locking screw
Figure 4a
Figure 4c
NEMA 7/9
Set screw
CAUTION:
- DO NOT attempt to reposition NEMA 4 /
NEMA 7/9 housings without loosening the
set screws; CENELEC/BASEEFA housings
MAY NOT BE REPOSITIONNED. ALWAYS
retighten set screw(s) after repositionning.
- DO NOT attempt to unscrew cover of CENELEC/BASEEFA housings before loosening
locking screw in base of housing. ALWAYS
retighten locking screw after replacing cover.
Set screw
Position
screw
Figure 4b
PREVENTIVE MAINTENANCE
Periodic inspections are a necessary means to keep your Magnetrol level control in good working order. This control
is, in reality, a safety device to protect the valuable equipment it serves. Therefore, a systematic program of
“Preventive Maintenance” should be implemented when control is placed into service. If the following sections on
“What to Do” an “What to Avoid” are observed, your control will provide reliable protection of your capital equipment.
WHAT TO DO
1.
Keep Control Clean
Be sure the switch housing cover is always in place on
the control. This cover is designed to keep dust and dirt
from interfering with switch mechanism operation. In
addition, it protects against damaging moisture and
acts as a safety feature by keeping bare wires and terminals from being exposed. Should the housing cover
become damaged or misplaced, order a replacement
immediately.
2. Inspect Switch Mechanisms,
Connections Monthly
Terminals
and
– Mercury switches may be visually inspected for short
circuit damage. Check for small cracks in the glass
tube containing the mercury. Such cracks can allow
entrance of air into the tube causing the mercury to
“oxidize”. This is noticeable as the mercury will
appear dirty and have a tendency to “string out” like
water, instead of breaking into clean round pools. If
these conditions exist, replace the mercury switch
immediately.
– Dry contact switches should be inspected for excessive wear on actuating lever or misalignment of
adjusting screw at point of contact between screw
and lever. Such wear can cause false switch actuating levels. Adjust switch mechanism to compensate
(if possible) or replace switch.
4
DO NOT operate your control with defective maladjusted
switch mechanisms (refer to bulletin on switch mechanism
furnished for service instructions).
– Magnetrol controls may sometimes be exposed to
excessive heat or moisture. Under such conditions,
insulation on electrical wires may become brittle,
eventually breaking or peeling away. The resulting
“bare” wires can cause short circuits. Check wiring
carefully and replace at first sign of brittle insulation.
– Vibration may sometimes cause terminal screws to
work loose. Check all terminal connections to be certain that screws are tight.
– On units with pneumatic switches, air (or gas) operating medium lines subjected to vibration, may eventually crack or become loose at connections causing
leakage. Check lines and connections carefully and
repair or replace, if necessary.
NOTE: As a matter of good practice, spare switches should
be kept on hand at all times.
3. Inspect Entire Unit Periodically
Isolate control from vessel. Raise and lower liquid level
to check for switch contact and reset.
PREVENTIVE MAINTENANCE (cont.)
WHAT TO AVOID
1. NEVER leave switch housing cover off the control
longer than necessary to make routine inspections.
2. NEVER place a jumper wire across terminals to “cutout” the control. If a “jumper” is necessary for test purposes, be certain it is removed before placing control
into service.
3. NEVER attempt to make adjustments or replace switches without reading instructions carefully. Certain adjustments provided for in Magnetrol controls should not be
attempted in the field. When in doubt, consult the factory or your local Magnetrol representative.
4. NEVER use lubricants on pivots of switch mechanisms.
A sufficient amount of lubricant has been applied at the
factory to ensure a lifetime of service. Further oiling is
unnecessary and will only tend to attract dust and dirt
which can interfere with mechanism operation.
TROUBLE SHOOTING
Usually the first indication of improper operation is failure of
the controlled equipment to function i.e. pump will not start
(or stop); signal lamps fail to light, etc. When these symptoms occur, whether at time of installation or during routine
service thereafter, check the following potential external
causes first.
– Fuses may be blown.
– Reset button(s) may need resetting.
– Power switch may be open.
– Controlled equipment may be faulty.
– Wiring or medium lines leading to control may be
defective.
If a thorough inspection of these possible conditions fails to
locate the trouble, proceed next to a check of the controls
switch mechanism.
CHECK SENSING UNIT
1. Check to be certain liquid is entering float chamber. A
valve may be closed or piping plugged.
2. Proceed to check level sensing action.
CAUTION: Unit must be normalized to atmospheric
pressure before removing switch housing assembly.
3. Remove the switch housing assembly by loosening the
enclosing tube nut located immediately below the housing base.
4. Inspect attraction sleeve(s) and inside of enclosing tube
for excessive corrosion or solids build-up which could
restrict movement, preventing sleeve(s) from reaching
field of magnet(s).
5. Fill chamber with liquid at room pressure. Check float(s)
to be certain it is buoyant in the liquid (float chamber
must have adequate liquid level). If float is determined to
be filled with liquid or collapsed, entire float chamber
assembly (sensing unit) should be replaced.
CHECK SWITCH MECHANISM
1. Pull disconnect switch or otherwise assure disconnect
power to the control.
2. Remove switch housing cover.
3. Disconnect power wiring from switch assembly.
4. Swing magnet assembly in and out by hand to check
carefully for any sign of binding. Assembly should
require minimal force to move it through its full swing.
5. If binding exists, magnet may be rubbing enclosing tube.
If magnet is rubbing, loosen magnet clamp screw and
shift magnet position. Retighten magnet clamp screw.
6. If switch magnet assembly swings freely and mechanism
still fails to actuate, check installation of control to be
certain it is within the specified three (3°) degrees of vertical (use spirit level on side of enclosing tube in two
places, 90° apart).
7. If mechanism is equipped with a mercury switch, examine glass mercury tube closely as previously described
in “Preventive Maintenance” section. If switch is damaged, replace it immediately.
8. If switch mechanism is operating satisfactorily, proceed
to check sensing unit.
CHECK COMPLETE UNIT
Reassemble the unit. Reconnect the power supply and
carefully actuate the switch mechanism manually (using a
non-conductive tool) to determine whether controlled
equipment will operate.
CAUTION: With electrical power “on”, care should be
taken to avoid contact with switch leads and connections at terminal block.
If all components in the control are in operating condition,
the trouble must be (and should be) located external to the
control. Repeat inspection of external conditions previously described.
NOTE: If difficulties are encountered which can not be
identified, consult with the factory or your local representative for assistance. A complete description of the trouble
should be provided along with information concerning your
piping and mounting arrangement, plus a description of
your operation sequence. Sketches or photographs showing the installation are also beneficial.
When communicating about your control, be certain always
to specify the complete Model and Serial numbers.
5
REPLACEMENT PARTS
Item
Description
1
Housing Cover
2
Housing Base
3
Switch Mechanism
4
Jam Nuts
5
Guide Washer
6
Attraction Sleeve
7
Enclosing Tube
Replacement part number
Housing Kits
Refer to bulletin 42-680/42-780 for Switch Housing Cover and Base Assemblies
Refer to bulletin on Switch Mechanism furnished. (Listed on Page 3.)
Sleeve
Kit ➀
89-3409-001 Standard Construction
89-3410-009 Stainless Steel Connection
Models with material code 1 & 2
Models with material code 3 & 4
32-6302-031
32-6302-036
32-6344-002
12-1301-002
32-6344-001
Nema 4X, Nema 7 & 9,
Pneumatic Switch Housing
Baseefa & Cenelec
8
E-Tube Gasket
9
Chamber Assembly
Chamber assemblies are available as complete sensing units ONLY with all parts listed
under items 4 trough 9 assembled.
➀ Standard construction kit includes attraction sleeve of
type 400 series stainless steel. Stainless steel construction kit includes sheathed attraction sleeve used on
models for corrosive service.
1
A. Model and Serial Number of Control
B. Replacement Part Number
,,,
,,,
,,,
,
,,,
,,,
,,,
,
3
,,
,,
2
IMPORTANT: Many B73 controls are specially tailored
to meet specific customer specifications and therefore
may contain special parts. When ordering specify:
7
8
9
6
6
4 5
DIMENSIONAL SPECIFICATIONS in mm (inches)
OUTLINE DIMENSIONS IN mm (inches)
A
B
Entry C
max D ➃
IP 65 (NEMA 4x)
151 (5.93)
109 (4.29)
1" NPT, M20 x 1.5 or PG16 (2 entries - 1 plugged)
459 (18.07)
NEMA 7/9 (IP 65)
143 (5.63)
100 (3.94)
1" NPT - 1 entry
453 (17.83)
CENELEC/BASEEFA (IP 66)
143 (5.63)
110 (4.33)
3/4" NPT OR M20 x 1.5 - 2 entries
507 (19.80)
NEMA 3R (IP 53) Pneumatic K
118 (4.64)
130 (5.12)
1/4" NPT - 2 entries
423 (16.65)
NEMA 3R Pneumatic J
118 (4.64)
110 (4.33)
1/4" NPT - 1 entry
423 (16.65)
Housing
➃ Allow ± 3 (0.12) tollerances on dimensions and allows 203 (8.00) overhead clearance for cover removal
ACTUATING LEVEL DIMENSIONS VS.
SPECIFIC GRAVITY – mm (inches)
Dimensions
Specific gravity
0.60
0.80
1.00
1.20
HL
30 (1.22)
43 (1.69)
49 (1.93)
54 (2.13)
LL
53 (2.10)
60 (2.36)
65 (2.56)
68 (2.68)
A
A
A
B
B
B
C
C
C
C
C
D
D
HL
LL
159 ± 2 (6.26 ± 0.08)
for material code 1 & 2
163 ± 2 (6.42 ± 0.08)
for material code 4
D
250 ± 2
(9.84 ± 0.08)
250 ± 2
(9.84 ± 0.08)
83 ± 2
(3.27 ± 0.08)
160 ± 2
(6.30 ± 0.08)
160 ± 2
(6.30 ± 0.08)
Threaded & Socket weld
Flanged
Flanged
upper side/bottom
upper side/bottom
side/side
7
IMPORTANT
SERVICE POLICY
Owners of Magnetrol products may request the return of a control; or, any part of a control for complete rebuilding or
replacement. They will be rebuilt or replaced promptly. Magnetrol International will repair or replace the control, at no cost to
the purchaser, (or owner) other than transportation cost if:
a. Returned within the warranty period; and,
b. The factory inspection finds the cause of the malfunction to be defective material or workmanship.
If the trouble is the result of conditions beyond our control; or, is NOT covered by the warranty, there will be charges for labour
and the parts required to rebuild or replace the equipment.
In some cases, it may be expedient to ship replacement parts; or, in extreme cases a complete new control, to replace the original equipment before it is returned. If this is desired, notify the factory of both the model and serial numbers of the
control to be replaced. In such cases, credit for the materials returned, will be determined on the basis of the applicability of our
warranty.
No claims for misapplication, labour, direct or consequential damage will be allowed.
RETURNED MATERIAL PROCEDURE
So that we may efficiently process any materials that are returned, it is essential that a “Return Material Authorisation” (RMA)
form will be obtained from the factory. It is mandatory that this form will be attached to each material returned. This form is available through Magnetrol’s local representative or by contacting the factory. Please supply the following information:
1. Purchaser Name
2. Description of Material
3. Serial Number
4. Desired Action
5. Reason for Return
6. Process details
All shipments returned to the factory must be by prepaid transportation. Magnetrol will not accept collect shipments.
All replacements will be shipped FOB factory.
BULLETIN N°:
BE 46-621.1
EFFECTIVE: NOVEMBER 1996
SUPERSEDES:
March 1991
UNDER RESERVE OF MODIFICATIONS
BELGIUM
®
DEUTSCHLAND
FRANCE
ITALIA
UNITED
KINGDOM
INDIA
Heikensstraat 6, 9240 Zele
Tel. (052) 45.11.11
Fax (052) 45.09.93
Schloßstraße 76, D-51429 Bergisch Gladbach-Bensberg
Tel. (02204) 9536-0
Fax (02204) 9536-53
11, Rue A. Einstein, Espace Descartes, 77420 Champs-sur-Marne
adresse postale: 77436 Marne-la-Vallée Cédex 2
Tel. (0) 164.68.58.28
Fax (0) 164.68.58.27
Via Arese 12, I-20159 Milano
Tel. (02) 607.22.98 (R.A.)
Fax (02) 668.66.52
Unit 1 Regent Business Centre
Jubilee Road Burgess Hill West Sussex RH 15 9TL
Tel. (01444) 871313
Fax (01444) 871317
B4/115 Safdurjung Enclave, New Delhi 110 029
Tel. 91 (11) 6186211
Fax 91 (11) 6186418