BBT-L
1
FOREWORD
To have proper working of Cesare Bonetti S.p.A. products,
any installation, start up, control and maintenance must be
performed by qualified and duly instructed personnel,
following prescription stated by maintenance manual.
To minimize any risk for people, goods and environment,
those general instruction must be respected.
Cesare Bonetti S.p.A. is not responsible for damages
outcoming from:
- use of product by non qualified personnel;
- incorrect installation;
- incorrect maintenance;
- product alteration or tampering;
- use of spares not original by Bonetti;
- non-performance of instruction stated in maintenance
manual;
- extraordinary occurrence.
Any responsibility regarding correct selection of product and
its proper material, depending on technical characteristic,
application and purchasing standards and rules, belong to
the system or plant engineer.
PRESSURE
Before starting maintenance operation be sure that pressure inside product is reduced to atmospheric value and be
sure that product connection piping has been correctly
isolated.
Do not trust on the Pressure Gage only to assume that
pressure has been discharged.
TEMPERATURE
To avoid burning, wait until product temperature cools down
completely, and use protecting gloves, eye glasses and
dressing, if necessary.
DISPOSAL
Product can be recycled. No environment pollution risk
occurs if proper procedure has been respected.
Warning: if product contains residue of process fluid,
disposal and/or recycling prescribed procedures for such
fluid must be respected.
In case PTFE sealing or gaskets is fitted on product, such
material must be recycled separately, according to proper
and/or prescribed procedures.
DANGEROUS GAS OR FLUID INSIDE PIPING
Be sure that any dangerous or flammable or explosive gas
or fluid has been discharged from product and connected
piping, to avoid any danger to maintenance people due to
contact or inhalation
ENVIRONMENT DANGER
Evaluate carefully: explosion risk, oxygen leakages, dangerous gas leakages, fire risk due to maintenance operation or
welding.
SEALING GASKETS
Graphite sealing gaskets to be removed or handled during
maintenance, as spares, could contain thin steel layers able
to injure, if non handled with care.
MAINTENANCE WORK
Maintenance work must be performed or supervised by
qualified, duly instructed and skilled people. Personnel in
charge of products maintenance, installation or exercise
must be trained to carry out procedures according to use
and maintenance manual.
Verify that tools to be used for maintenance are within their
scope and that they are in good condition.
If special tools are requested, verify their availability and
condition.
STORAGE
If products that are non self-draining are stored in low
temperature, be careful to avoid or protect them from inside
fluid freezing.
Good condition of stored products must be periodically verified.
PRODUCTS SENT BACK TO BONETTI COMPANY
According to laws and rules for safety, health and environment preservation, if any product is sent back to Cesare
Bonetti S.p.A. for maintenance or any other reason, the
sender must inform by written notice about risk and warning
to be used depending on product mechanical damages, or
inside and/or outside product fluid residue and/or contamination, that could be dangerous for health, safety or environment.
Such information must be completed with any useful safety
instruction and safety data sheet regarding substances classified as dangerous or potentially dangerous.
I-20024 GARBAGNATE MILANESE (iTALY)
Tel.: +390299072.1 - Telefax: +39029952483
Internet: http://www.cesare-bonetti.it
e-mail: bont.post@cesare-bonetti.it
UUSSEE && MMAAIINNTTEENNAANNCCEE MMAANNUUAALL OOFF BBOONNEETTTTII®VVAALLVVEESS
TTYYPPEE BBBBTT-LL - BBEELLLLOOWWSS SSEEAALLEEDD - CCAASSTT IIRROONN
SAFETY GENERAL INFORMATION
PED 97/23/EC
Art. 3.3 & Cat. 1
Pubblicazione B 02 - 06 - Eng - Rev. 0
This manual is exclusive property Cesare Bonetti S.p.A.,
under Copyright and any not authorized reproduction, in
part or in total, shall be prosecuted.
Shown products are according the current production.
Cesare Bonetti S.p.A. reserves to modify product
characteristics according technical evolution or customer
special request.
Verify if manual comply with used product.
1.0 SCOPE
This manual states safety criteria, check and controls, installation
instruction, use and maintenance instruction for BONETTI
®
Bellows
sealed valves type BBT-L valves, in cast iron material, manufactured by Cesare Bonetti S.p.A.
2.0 PRODUCT DESCRIPTION
The BONETTI BBT-L bellows sealed valve is a device useful to
intercept a fluid, liquid or gas.
Standard materials normally used for pressure containing part are
Cast Iron GG-25 and Nodular Iron GGG-40.3.
If those materials are not suitable for the fluid, please note that
Cesare Bonetti S.p.A. can provide same type of valves in forged or
cast steel or in special materials according to Customer specification.
3.0 RATING
Max rating condition (pressure and temperature) and group fluid
classification is stated by 97/23/CE Directive (PED), annex II, and
are shown in following Table 1.
WARNING: For “soft seated” valves (with PTFE insert in the disk),
maximum allowable temperature is limited to 200 °C.
GGG-40.3 nodular cast iron valves can be used with thermal oil
only if the application does not exceed maximum admittable
limit stated by Cat. I, Table 6 for Group 1 fluids in the PED Directive. To verify if such limit is respected make following calculation:
multiplying exercise pressure (PS) in bar for the valve ND (nominal
diameter) in millimeters the result must be
≤ 1.000.
WARNING:
Cast iron valves can not be used for “Lethal service”. Lethal service
is the use of valves with “Lethal Substances" as defined in ASME
Section VIII Part UW:
By "lethal substances" are meant poisonous gases or liquids of such
a nature that very small amount of the gas or of the vapour of the
liquid mixed or unmixed with air is dangerous to life when inhaled.
For purpose of this Division, this class includes substances of this
nature which are stored under pressure or may generate a pressure
if stored in a closed vessel.
4.0 SAFETY CRITERIA
Proper working of valves can be obtained if all steps regarding
installation, start up, control and maintenance are managed by duly
instructed, qualified and skilled personnel.
Therefore this use and maintenance manual, together with the use
and maintenance manual of each valve type, must be deeply
considered by such personnel.
If use and/or maintenance instruction are not applied, product may
be damaged or work badly, generating risk of damage to people,
plant or environment.
Prescription stated in section “SAFETY GENERAL INFORMATION”
must be respected.
5.0 INSPECTION AT RECEIPT
When receiving goods, check carefully to verify that no damage has
been suffered during transportation.
Check also that valve type, rating pressure/temperature as shown
on Table 1 and valve material, as indicated on body, bonnet and/or
label, comply with application.
Never exceed limits stated by such rating.
Verify and be sure that valve material is suitable for process fluid
and surrounding atmosphere.
6.0 STORAGE
Valves must be stored protected from weather or contamination
arising from dirt, mud and so on. If valves have to be stored for a
while, we suggest to maintain them in the original packing. If storage
is very long, check valves periodically (not less than twice an year)
and verify surface and internal condition, removing any dirt, rust
and/or corrosion from inside and outside.
7.0 INSTALLATION
Installation must be done by qualified and skilled personnel.
Before installing, to avoid structure deformation or any other
damage that could cause leakage or bad valve working, check carefully to:
remove protection caps from valve end connections;
verify absence of dirt inside valve;
be sure that upstream and downstream piping is clean and without any dirt coming from drilling or welding (as metal shaving or
slag) or corrosion and so on;
install single way valves according arrows indication on body;
install valve so that it does not sustain piping weight, and sustain
valve if its weight could stress or danger flanges or piping, also
considering vibrations, seismic stress or wind, if any. Cesare
Bonetti S.p.A., on request, can provide you technical data to
calculate, at your care, such stress
avoid misalignment between piping and valve ends. Check if face
to face valve dimension fits correctly with distance between piping
ends.
avoid valve or piping thermal expansion able to stress the structure. To minimize thermal expansion effect insert an expansion
joint or use other systems able to minimize such deformation.
for flanged valves check correct position and dimension of
gaskets between valve flange and piping flange, apply the proper
bolting torque to stay bolts. For screwed valves verify compatibility between valve and piping screw thread.
in the sketch assembly always install systems able to section and
interrupt upstream and downstream flow, with a draining system
for said sectioned plant parts.
Those section and draining systems give also a good help when
maintaining valves in safety conditions.
8.0 EXERCISE
BONETTI’s bellows sealed valves, usually, do not require maintenance.
Verify periodically that moving items - as stem or bushing - are properly greased, using graphite grease suitable for the exercise operating temperature.
If the valve can be corroded or oxidated by external atmospherical
agents or by internal plant environment atmosphere, protect the
valve using painting able to avoid or minimize such corrosion.
Bellows valve sealing to environment is assured by metallic bellows
between fluid process and environment. Pecking is a subsidiary
sealing element providing safety second sealing in case of bellows
breakage. This second safety sealing must be used only up to an
immediate valve maintenance.
WARNING: If there is any leakage from the packing, this indicates the bellows breakage: valve must be immediately maintained. To stop such leakage operating with the packing gland
must be considered as emergency and valve must be maintained as soon as possible. The sole packing sealing can not
guarantee proper use of the valve according the valve design
safety condition.
If the packing leakage is not immediately stopped, packing can be
damaged very soon, so requiring its complete change. A long time
leakage can also irreparabily damage metallic surfaces contacting
the packing (as stem and stuffing box).
On line sealing of BONETTI bellows valves is obtained with a metal
to metal contact between seat and disk. For “soft seat” bellows
valves, the sealing is obtained wit a metallic seat and a PTFE insert
in the valve disk.
If sealing is not obtained with a proper handweel closing torque, that
is equal to a maximum force of 370 N for each hand, do not force
such limit using lever or other instruments to increase closing
2
GGEENNEERRAALL UUSSEE AANNDD MMAAIINNTTEENNAANNCCEE PPRREESSCCRRIIPPTTIIOONN
Table 1
Type Material Rating T min. Gr. Tab. Art.3.3 Cat I
DIN 2401 °C
BBT-L GG-25 PN 16 - 10 2 7 ≤ DN 50 DN 65÷200
BBT-L GGG-40.3 PN 16 - 20 2 7 ≤ DN 50 DN 65÷200
BBT-L GGG-40.3 PN 16 - 20 2 7 DN 250 (*)
BBT-L GGG-40.3 PN 25 - 20 2 7 ≤ DN 40 DN 50÷200 (**)
(*) Max allowable pressure: DN 250 14 bar.
(**) Max allowable pressure: DN 50÷125: 25 bar
DN 150: 23 bar
DN 200 17,5 bar
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