GESTRA RHOMBUSline MK 45 A-1, Оригинальная инструкция по установке

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9
Application of European Directives
Fluids
The equipment is designed for the following fluids
(in accordance with the EU Pressure Equipment
Directive or Pressure Equipment (Safety)
Regulations in the UK):

Fluids of group 2
Due consideration must be given to chemical and
corrosive influences.
Potentially explosive atmospheres
The equipment does not have its own potential
source of ignition (as per ATEX Directive). Please
pay attention to the following information:
When installed, static electricity may arise between
the equipment and the connected system.
When used in potentially explosive atmospheres,
the plant manufacturer or plant operator is
responsible for discharging or preventing possible
static charge.
If it is possible for medium to escape, e.g. through
actuating mechanisms or leaks in threaded joints,
the plant manufacturer or plant operator must take
this into consideration when dividing the area into
zones.
Task and function
This equipment is designed for discharging
condensed water or air-venting steam lines.
Condensate discharge is controlled by the
membrane regulator capsule and the associated
nozzle insert. The membrane regulator capsule is
located on top of the nozzle insert.
Function of the single-seated capsule for
nozzle insert
The membrane regulator capsule contains a liquid
filling the evaporation temperature of which is a few
degrees below the saturation temperature of water
(condensate). From cold to just below steam
temperature the fluid filling in the capsule stays
liquid and condensate is discharged.
As condensate temperature approaches steam
temperature, the capsule filling begins to evaporate
and the increased pressure forces the flexible
control membrane inside the capsule onto the
single seat, thereby closing the nozzle insert.
The control characteristic of the membrane
regulator capsule closely follows the saturated
steam curve.
Function of the tandem-seated capsule for
nozzle insert
The tandem seat capsule basically works like the
single seat capsule but features a double seat that
ensures tight shut-off and a long trap life. First the
self-centering valve cone gives steam tight shut-off.
Then, as the condensate temperatures rises, the
second seat also seals off the nozzle insert.