Argus 671020, Instructions Manual

Page: 5 / 47

Argus E25 MOD II - Operating Instructions
5
Basic safety instructions
Explosion hazards
The unit has been designed and manufactured taking the har-
monised standards EN1127-1, EN60079-0 and EN60079-1 into
account. Thus, the unit is protected against potentially-
explosive atmospheres by a pressure-resistant flameproof
enclosure “d”.
In spite of this, the following points must be observed:

An explosion hazard arises from using equipment that is
unsuitable for the environmental conditions.
Before use in an environment in which there is an explosion
hazard, observe the following points:

The surface temperature of the equipment must not ex-
ceed that permissible at the location where it is installed.

If the unit is installed so that it is electrically isolated, suit-
able measures must be adopted to discharge static elec-
tricity between valve connections.

Moving parts that are extremely resistant to movement, may
give rise to frictional heating. Ensure that moving parts move
freely.

During welding operations, there is a risk of explosion or fire
being caused by open flames, electric arcs and flying
sparks. Observe the valid legal regulations concerning pro-
tection against fire and explosions that apply where the unit
is installed.
The unit and its components shall only be assembled or
dismantled by specialist personnel.
Danger of serious injury

The unit can become hot during operation. Only take the unit
into service when contact with hot surfaces is prevented by
insulation or guards.

During operation the unit is under the influence of higher
ambient temperatures and may be hot. Do not carry out
work on the unit until the following conditions apply:

The unit has been disconnected from sources of electrical
energy.

The unit has cooled down (to about 20°C).

During any work on the unit, the higher-level plant must
be switched off and secured against unauthorised switch-
ing back on.

For units installed in contaminated areas, there is a danger
of severe or lethal injury from hazardous substances on the
unit. Do not work on the unit until it has been completely de-
contaminated. Wear the specified protective clothing during
all work in the contaminated area.

The unit and its components shall only be assembled or
dismantled by specialist personnel. Specialist personnel
must have knowledge and experience in the following sec-
tors:

Qualified electrician

The selection of lifting gear suitable for the unit, and the
safe use of such lifting gear

Working with hazardous media (contaminated, hot, or un-
der pressure)

The selection of unsuitable lifting gear, or its incorrect use,
can result in the unit or parts of it falling.

Allow only specialist personnel to lift the unit or its parts.

Make sure that there are never persons under suspended
loads.

Make sure that lifting gear has adequate load capacity for
the load it has to lift, and that such loads are properly at-
tached.

Make sure that all valid, local safety and accident-
prevention regulations are observed.

If the permissible application limits for the unit are exceeded,
the unit may be destroyed, and hot or pressurised media
may be released. Make sure that the unit is always operated
within the permissible application limits.
Details of the application limits are given on the unit’s typep-
late and in the chapter “ Technical data ”

If it is used without supports with adequate load capacity and
sufficiently stable connections to the valve, the unit may be
damaged. Allow only specialist personnel to assemble and
connect the unit.

If the unit is inadequately supported during installation, sub-
stantial injuries (e.g. crushing) are possible if the unit falls or
tips. During installation secure the unit to prevent it falling or
tipping. Wear the protective clothing specified at the location.

The unit can be installed on several different types of valve,
e.g. a ball valve or a butterfly valve. Depending on the ener-
gy source for the drive, there is a danger of severe or lethal
injuries from a variety of causes. Before starting any work on
the unit, make sure that it is disconnected from the power
supply, and that the valve and its pipework are pressure-
free. Observe and follow all hazard notes in the operating in-
structions for the valve. If you have any queries, please con-
tact the valve manufacturer.

There is a danger of severe or lethal crushing by moving
parts of the unit. During operation, make sure that no one
can be in the vicinity of the moving parts or reach into them.
Before any work on the unit, make sure the actuator is