Adler SpA
Valvole a sfera –- V.le Borletti , 14 - 20010 S. Stefano Ticino (MI) - ITALY
Tel.
+39 - 0297484211 –
Fax
. +39 - 0297271698
- Web Site
: www.adlerspa.com -
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CONSIDERATIONS OF TECHNICAL RISK
Adler S.p.A.
ball valves, if provided of
CE
marking are manufactured in accordance with
P.E.D. directive
(97/23/EC) and/or
ATEX
directive
(94/9/EC)
and/or
machinery directive
(98/37/EC), but they don’t consider in their design the following factors of risk:
1)
Adler S.p.A
.
“Standard” ball valves can be used in a temperature range between –28.8 / + 250 °C. For service temperatures below – 28.8 °C ball
valves construction materials shall be submitted to an impact test at the minimum service temperature. For temperatures between – 28.8 °C &
+ 250 °C ball valves have to be provided with seats & seals able to withstand the temperature degree required (
Adler S.p.A.
technical support is
suggested to select the suitable seats & seal material).
2)
Adler S.p.A
.
“Standard” ball valves are not equipped with devices suitable to avoid internal over-pressures caused by incorrect operations of
process or by fluids & liquids subjected to an increase of volume and/or pressure. (These devices, such as the over-pressure hole into the ball or
the safety relief seats are available upon request).
3)
Adler S.p.A
.
“Standard” ball valves are not designed with special devices to withstand a sudden thermal jump (thermal Shock).
4)
Adler S.p.A
.
“Standard” ball valves are not equipped with “Fire Safe” seals. (“Fire Safe” ball valves certified
BS 6755
are supplied upon request).
5)
In general
Adler S.p.A
.
“Standard” ball valves are not mechanically designed to bear over loads due to exceptional atmospheric or natural
phenomenon’s (Ex. earthquakes).
6)
In general
Adler S.p.A
.
“Standard” ball valves are not designed to bear loads on flanges, on pipe connections or pipe-line.
7)
In general
Adler S.p.A
.
“Standard” ball valves can’t withstand with ice inside their bodies. (In this case user has to consider the optional stem
extension for insulating, avoiding the presence of residual product inside the valve).
8)
Adler S.p.A. ball valves are suitable for low temperature service (up to – 196°C) when provided of cryogenic stem extension (available on
request).
9)
Adler S.p.A. ball valves are suitable
“industrial
” oxygen service when supplied degreased and packed in polyethylene bags only.
N.B. For
“medical”
oxygen service please contact Adler S.p.A.
10)
The compatibility between ball valves construction materials and mediums is selected by the user.
Adler S.p.A
.
personnel are at your disposal for
additional technical aid, but the user is ultimately responsible for verifying the compatibility between medium and materials.
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.
BALL VALVE START-UP
Before installing the ball valve on the pipe-line it is mandatory, for the user, to verify the compatibility of the ball valve with service conditions (medium,
temperature and pressure). With reference to standard ball valves stocked on shelves by wholesalers they will have to assure themselves about the
compatibility with the use conditions required by the customer. Alternatively with reference to the “consideration of technical risk”, they’ll have to ask to
Adler S.p.A
.
to suggest the suitable product for the specific utilization required.
Adler S.p.A.
Ball Valves must be only used for on-off (fully open/ fully close) service.
It’s mandatory to consult
Adler S.p.A
.
Technical Department before using ball valves for
regulating
service.
Before using the ball valve in a potential explosive atmosphere it’s necessary:
•
to verify the compatibility between the ball valve and the zone in which the ball valves should be installed (see directive 99/92/CE);
•
to foresee the pipe-line ground connection on which the ball valve should be installed;
•
to check that the temperature of the ball valve surface is not higher than the flammable point of the atmosphere in which the ball valve is installed
(in this case foresee an insulating cover device for the valve and an extension for the wrench) ;
•
before installing ball valves with welding ends to make sure that the process of welding is realized respecting all the safety norms the classified
zone requires;
•
to avoid mechanical knocks during the installation that may cause sparks.
REMARK
:
Adler S.p.A.
cannot be held responsible for damage caused by improper use or modification of the product.
8805.82/EN
