Buhler GAS 222.21 Ex2, Инструкция по установке и эксплуатации

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GAS 222.21 Ex2
NOTICE
Ceramic filter elements are very brittle by nature. Handle them with care, don’t let them
fall.
Filter elements made out of sintered stainless steel can be cleaned in an ultrasonic bath
and be used several times as long as both seals are still in proper conditions.
NOTICE
The weather hood can only be closed again when the handle is completely vertical. In or-
der to do so, loosen the hood from the locking supports by lifting slightly and then fold
down. Ensure that the hood lock clicks into place correctly.
Condensate inside the pressure vessel
Depending on the installation site and application conditions a small amount of condensate may form inside the blowback air
pressure vessel. Open the drain screw at the bottom of the vessel and drain the condensate at least once a year.
If the probe needs to be serviced more frequently due to operating conditions, we recommend also draining the condensate at
these intervals.
CAUTION High pressure
Pressure vessel under pressure.
Before opening the condensate drain, close the air supply to the blowback control and
drain the vessel by manual blowback.
Pressing the main switch for the blowback control to interrupt the voltage supply.
6.2 Backwashing the Intake Filter (within the process stream)
DANGER Adiabatic compression during gas blowback (explosion hazard)!
Adiabatic compression may cause high gas temperatures and must be checked by the
user.
Gas blowback may result in high gas temperatures due to adiabatic compression. This
can cause flammable gases to ignite spontaneously.
a) Blowback of explosive atmosphere / gases is prohibited.
b) Flammable atmosphere / gases (non-explosive) may only be blown back with nitro-
gen (inert gas).
Be sure to use filtered air with a minimum rating of PNEUROP / ISO Class 4 for blowback:
Class Particles / m
3
Particle size:
(1 to 5) µm
Pressure dew point
[°C]
Residual oil content
[mg / m
3
]
4 to 1000
(no particles ≥ 15 µm)
≤ 3 ≤ 5
6.2.1 Manual Blowback (Without Blowback Control)
The shut-off valve in the air supply (inert gas supply) to the pressure vessel must be open. The optional pressure gauge on the
pressure vessel shows the current operating pressure.
– To blowback, first close the shut-off valve in the gas probe (handle below the probe/weather hood).
– Then abruptly open the ball valve inside the connecting line from the pressure vessel to the probe until the display on the
pressure gauge has dropped to the lowest reading.
– After blowback, close the ball valve and open the shut-off valve in the probe.
18 Bühler Technologies GmbH BE460048 ◦ 08/2019