3. ATEX –Explosive Environment
Pneumatic equipment shall complywith the requirements of ISO 4414.
The Compact can be installed in any appropriate potentially explosive hazardous area
as listed on the identification nameplate on the actuator. The Compact is certified to
category 1 according to the ATEX Directive 2014/34/EU (Equipment intended for use in
PotentiallyExplosive Atmospheres).
Special condition forsafe use.
1. Any electrical equipment (solenoidvalves/limitswitches)shallbe suitably certified
as specifiedby themanufacturer.
2. The air compressor must incorporatea filter on the intakesystem and contain only
lubricants that are resistant toignition orcarbonization at anticipatedtemperatures.
3. The air delivery must not beprovidedby hoses that aremanufacturedfrom
elastomeric materials that can carbonize and form glow particles inanticipated
temperatures.
4. The supply of air must come from a safe area and contain noexplosive gas or dust.
5. The temperature class is based on the maximum process temperature. The end
user must ensure that the process temperature does not exceed the temperature
classificationlimitations.
6. The ball valves havebeen assessed as simple equipment within the assessment
performed for the actuator. When used separately fromthe actuator, the ballvalves
shall be used within the parameterspermitted for theactuator.
7. No charging mechanism stronger than amanual rub shall be applied to external
non-metallicmaterials.
8. The actuator shallonly be usedin locations where a propagating brush dischargeis
not possible.
9. The actuators must have a cycle rate of ≤1 cycle per minute.
10. It is the user’s responsibility to ensure that the system/internal parts of the
actuator are suitably purged of explosive gas. In addition,before using the actuator,
the users must enter into the actuator non-explosive gas, to ensure thatthere is no
potentialfor ignition.
11. During maintenance, the end user shall ensure thatany lubricationused hasan
auto-ignition greater than50Kabove the maximum surface temperature (80°Cfor T6,
95°C for T5 and 130°C for T4) and shallalso beresistantto carbonization. Lubricated
seals
Habonim recommend replacing all seals every500,000cyclesor 5 years, whichever
comes first. All new seals should be lubricated. See “Lubricants” paragraph to identify
which lubricant touse.
Bearings/soft parts
Habonim recommend replacing all bearings and soft parts every 500,000cycles or 5
years, whichever comes first.
Springs
Habonim recommend replacing all springs every 500,000 cycles.
Drive –Air Supply
• Use clean dry air according to ISO 4414.
• The air compressor must incorporate a filter on the intake system and contain only
lubricants that are resistant toignition orcarbonization at anticipatedtemperatures.
• The air delivery must not be provided by hoses that are manufactured from
elastomeric materials that can carbonize and form glow particles inanticipated
temperatures.
• Supply Pressure for the Compact actuators are as follows:
Double-acting: 2-8 barg (30-120 psig).
Spring-return: 3-8barg (40-120 psig).
For IIB, other inert gases may be used such as nitrogen, argon and sweet natural
gas.
Thin hydraulicoil can also be used. Do not usewater asa supply medium.
Severe operation
The ATEX does not cover Severe operating conditions:
• Application temperature less than -50 deg C
• Application temperature higher than +120 deg C
Certificationstandards: EN ISO 80079-36:2016 & EN ISO
80079-37:2016
Special condition for spring return/airto spring
All spring return actuator models shall have a Namur breather block
or a solenoid valvethat acts asa breatherfitted tobothportA and B
as shown in the manufacturer’s drawings. When the solenoid valve is
used in place of the breather, it shall replicate the breather block in
terms of preventing an internal atmosphere only the solenoid is
directlyinstalled intoportA and B.
When the actuator is operated on start up or from being offwith no
pressurisation, the end user must purge the internal parts of the
actuator in accordance with the IOMmanualto ensure there has not
been a build-up of an internal explosive atmosphere; to enhance
safety a Specific Condition of use to that effect applies (Prior to
putting the equipment into operation, the internal chambers of the
actuator shell be purged with clean, dry air from a non –hazardous
area or an inert gas; refer to equipment IOMmanual). Once purging
has been completed,the end user shall startthe actuatorby supplying
air pressure toport A. At this point,a V-shapedgasket atthe breather
block device moves to the left and allows non-explosive
instrumentation air filling the inner chamber of the actuator. At the
same time the air, whichis in thespring chamber,willbe pushed out
by the piston’s movement through the actuator's port B and out to
the exit orifice. The outer atmosphere will no longer enter the
actuator and the actuator will only contain non-explosive
instrumentation air in both chambers.
Closing the actuator by stopping the pressure supply toportA. At this
point, the V-shaped gasket will move to the right due to the
instruments air pressure in the internalchamberand redirect itfrom
the inner chamber towards the exit orifice. At the same time the
outgoing air will fill the spring chambers.
