Edwards ATEX 1 EHR, Инструкция по эксплуатации

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Introduction
A750-04-880 Issue F

if you use an external seals flush supply, you may also want to fit an optional pressure switch in the seals
flush supply pipeline.
On ATEX Category 2 pumps, if you use a sealing liquid which has a boiling point higher than 100
o
C, the temperature
of the sealing liquid ring must be monitored by a temperature transmitter, set to shut down the pump when the
temperature reaches 70
o
C: refer to Section 3.13 .
1.3.3 Normal operation
The ATEX Category 1, 2 and 3 liquid ring pumps rely on the pump’s constructional safety for the safe pumping of
flammable materials. In normal operation, as defined by this manual, the pump is safe for the pumping of flammable
materials where there is no risk that any particles larger than those specified in
Table 2 could enter the pump at any
time, and so cause a potential ignition hazard.
Where there is no such risk, the pump can be used to pump flammable materials from gas group IIC, within the normal
parameters as defined in this manual.
The pump can be used with either flammable or non-flammable sealing liquids. Where flammable sealing liquids are
used, you must comply with the requirements of
Section 3.3 .
On ATEX Category 2 pumps configured for external seals flush supplies, the seals flush supplies must comply with the
requirements of
Section 2.6 . ATEX category 2 pumps configured for internal seals flush supplies must only be used
on clean applications.
The materials of construction of the pump are specified in Section 2.7 . Before you use the pump, you must ensure
that these materials are compatible with the gases and vapours you will pump.
1.3.4 Abnormal operation

Pumping gases with temperatures greater than the system temperature classification (see Section 1.3.2 ).

Pumping hydrocarbon oxides.

Pumping oxidants.

Pumping pyrophoric gases.

Pumping gases that tend to self-decompose, or that are chemically unstable.

Pumping gases that contain particles larger than those specified in Table 2 .

Use with oxygen enriched atmospheres.

Use of the pump with mineral oil as the seals flush liquid.

Use of the pump with a sealing liquid or seals flush liquid which does not comply with the requirements of
Section 2.6 .

Pumping of, or use of, the pump in the presence of explosive dust atmospheres.
WARNING
The pump relies on the principle of constructional safety to pump flammable gases and vapours
safely. To conform with constructional safety requirements, it is your responsibility to ensure that
particles larger than those specified in
Table 2 cannot enter the pump at any time.
WARNING
Misuse of the pump as described below is strictly prohibited.