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Trimod Besta Pneumatic Level Switch – type P...
Trimod Besta Pneumatic Level Switch – type FP...
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Information: Application hints and important information. To be followed for optimal function.
Attention:
Requirements and prohibitions to prevent damages, especially to material and the environment.
Danger:
Dangerous situation that can lead to injury and death if instructions are not followed.
1.
Safety Instructions
The operating instruction must be read and understood before installation. If you are uncertain on any
point, please contact Bachofen AG.
During work in potentially explosive atmospheres at the operator's site, please ensure that you always
observe the special regulations applicable to work on Ex-devices (applies to types FP...).
Every Trimod Besta level switch must be selected by qualified personnel in accordance with the specifica-
tions stipulated by the customer. These specifications must be kept by the operator in a safe place, together
with the operating instruction, the customer-specific designation and the type number (see type plate). In the
event of any deviation of the physical quantities (pressure, temperature, density, etc.) from the original
specification, the suitability of the level switch must be checked again by qualified, trained personnel or by
the manufacturer, with regard to the new specifications. Process vessels / float chambers must be brought to
atmospheric pressure and appropriately vented before work is carried out.
The Trimod Besta level switches must under no circumstances be used as a support aid or as a
security fixture for equipment structures or persons.
2.
Conformity to standards
The Trimod besta level switches of type series P... do not fall within the scope of application specified in the
Machinery Directive 2006/42/EC. They must therefore not be labelled with the CE marking in accordance
with the Machinery Directive.
In addition, the Trimod Besta level switches of type series FP... correspond to the requirements of the
standards according to EN 60079-0, EN 60079-26.
3.
Technical data
Pneumatic connection
Supply air (compressed air quality) :
Max. control pressure
Test pressure
Internal opening at 10 bar
Kv factor
Internal leakage rate
Flow rate
Pressure drop
The connection of the type series FP... should be carried out in accordance with the rules and safety
regulations for Ex-devices.
Principles of use
Depending on the required function, the supply air can be connected to the 3/2-way valve optionally at A or
B, according to whether the filling process (Fig. 1) or the emptying process (Fig. 2) or the actuator is fail-safe
to close or fail-safe to open. This means that the pressurization occurs via A-C and the venting via C-B or
vice versa, pressurization via B-C and venting via C-A.
www.trimodbesta.com
Quality class acc. to ISO 8573-1 (7:4:4)
:
10 bar
:
12 bar
:
1.5 mm
:
1
:
Max. 1 cm³/min
:
90 Nl/min at 6 bar
:
1 bar
6 │ 16
Operating Instruction – English
(for use in Ex-zone)
LTB003X │ 2020.09
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