Mounting instructions for butterfly valves
SYLAX DN 25-350
Modifications, errors and printing mistakes cannot be held responsible for damages incurred. Socla reserves
the right to modify products without prior warning. All trademarks of these products are the property of the
respective companies .
1
European Directives
Our butterfly valves subject to directives are the object of statements of conformity available from our sales department.
When using accessories, (actuators, limit switches, solenoid valves), please see the corresponding instructions documents.
•
Directive 97/23/CE (Equipment under Pressure)
Our Sylax butterfly valves DN 25-350 conforms to the Equipment under Pressure directive 97/23/CE in
catégorie I et II
.
.
•
Machinery Directive 2006/42/EC(Machinery Directive)
Our Sylax butterfly valves DN 25-350 conform to the Machinery Directive 2006/42/EC
Introduction
•
Directive 94/9/CE (EXplosive ATmospheres)
As standard, our Sylax butterfly valves DN 25-350 conform ,
in special version
, to the Directive on equipment and protection systems
destined to be used in Explosive Atmospheres 97/9/CE
This directive is only applicable in the following atmospheric conditions :
-20°C<T<+60°C and 0,8 bar
≤
P
≤
1,2 bar
The fluid being carried is not taken into account in the risk analysis of the valve made in this directive, even if the fluid brings
about deliberate internal explosive atmospheres. It is the user’s responsibility to take into account the risks generated by the
fluid for example:
-
the heating of the valve surface,
The temperature of the valve surface should be considered as equivalent to the temperature of the fluid which passes through
the pipe (in an environment normally ventilated). Considering the temperature of the fluid which passes through the pipe, the
class of temperature of the valve is :
-
the generation of electrostatic charging due to fluid displacement,
-
internal shocks generated by granular substances, shock waves present in the installation (water hammer) or risks from
foreign objects which may be present in the installation.
Classification of the valve only:
II : group
2 : category
G : explosive atmospheres due to the presence of gas, vapours or mists
D : explosive atmospheres due to the presence of dust
Our products are designed to be used in atmospheres of gas and vapours of groups IIA,IIB and IIC as their coatings are a maximum 0.2
mm thick.
Our valves (valve only) are marked
:
II 2 DG
In cases where the coating is between 0.2 and 2 mm the marking is
:
II 2 DG IIB
Classification of the valve with control
:
!
Va
lve with hand lever
:
The use of Socla hand lever designed to function in ATEX zones does not present any extra risk.
The valve / hand lever together have the same marking
:
II 2 DG
!
Va
lve with other actuators
:
The classification of the valve and control together given by Socla is identical to the classification of the lowest-classed component
involved (see illustration below).
No supplementary markings are used to indicate the classification of valve/control combinations.
If a single element of the combination does not carry the ATEX mark then the entire valve/control combination does not
conform to the ATEX directive
.
.
Sylax DN 25_350 butterfly valves are provided for drinking water, swimming pool water, hydrocarbons, dry or hot gas, powdery,
abrasive and food process
. Nevertheless before fitting the valve between flanges, make sure that the operating conditions are
compatible with the details given on the identification plate, this instruction notice, the manufacturer's details (technical data sheets,
price list) and the fluid being carried (nature of the fluid, temperature range etc).
Socla cannot be held responsible for the malfunctioning of the valve nor for damage or injury resulting from failure to comply with these
details.
Class of temperature
Maximum temperature of surface (°C)
T1
450
T2
300
T3
200
T4
135
T5
100
T6
85
The connecting base plate of butterfly valves conforms to the standard EN ISO 5211.