Dry-air supply
Purpose
To
serve SCT/PIX/ TRT needs of
=
dry and filtered air with dew point <45 C as environmental gas at higher
flush rates
=
filtered compressed air for PIX/TRT
This
are the main supply filter stages which will be added to the existing
compressed air supply to provide the environmental gas at higher flush rate
(require about 5m3/h for SCT per test station).
This
may later be supplemented with dry N2 at much lower flow during during some
required tests (order of 500 l/h per test station in case of SCT)
The
distribution lines behind the filter will be stainless steel pipe work.
Filter stages
From
Richard:
The
choice of a 1" line will cater the pressure drop (25Mt) at a high flow
rate whilst not affecting the coordinate measuring machine stability.
The
1" compressed air line is protected by the following "Compair"
filter cartridges:
-
ref:CE 0087 A
(Grade
A - Pre-Filtration, Particle removal down to 25 microns)
-
ref:CE 0087 C
(Grade
C - High Efficiency Oil Free Protection Particles removal down to 0.01 micron
including water and oil aerosols, providing a maximum remaining oil aerosol
content of 0.01mg/m3 (0.01ppm) @ 21¼C)
-
ref:CE 0087 D
(Grade
D - Activated Carbon Filtration, removal of oil vapour and hydrocarbon odours
giving a maximum remaining oil content of <0.003mg/m3 (<0.003ppm)
(excluding methane)@ 21¼C)
The
pipe material should be TIG welded (inerted) stainless steel.
The
compressed air treated and delivered this way has no odourand no debris
avoiding the 'point of use' filtration.
The
maximum flow rate is quoted 4.8 m^3/min.
The
max. operating pressure is 16 Bars.
The
differential pressure is (100[A]+200[C]+70[D]) 370 mBar for a dew point of
-70¡C.
This
is ideal for a 'free exhaust' in the room, the air pads of a CMM and moving
equipment on air cushions.
Spec sheets
Distribution
Outlets are at the
following locations (supplied either from 1Ó, 3/4Ó, 1/2Ó pipes depending on
flow requirements) Piping is planned as stainless steel
This included a Òcleaning
outletÓ, outside the airlock, which is not filtered, to have compressed air
available for cleaning of dirty transport boxes/equipment/etc
Outlet will be placed close
to existing groups of Electricity/network outlet and can then be distributed
from their on locally to test setups
