STI S.r.l has taken every care in collecting and verifying the documentation contained in this Instruction Manual. The information herein contained are reserved property of STI S.r.l. ____________________________________________________________________________________ STI S.r.l. – Via Dei Caravaggi 15, 24040 Levate (BG) – ITALY www.imi-critical.com Manual 9028, rev.00 09/2016

____________________________________________________________________________________ STI S.r.l. – Via Dei Caravaggi 15, 24040 Levate (BG) – ITALY www.imi-critical.com Manual 9028, rev.00 09/2016

1 PURPOSE Purpose of this manual is to clarify the quality of the air useful to feed IMI STI actuators, positioners and accessories in order to guarantee the correct behavior of these instruments and avoid damages. L’obiettivo di tale manuale è quello di definire la qualità dell’aria utile ad alimentare gli attuatori IMI STI, posizionatori e accessori al fine di garantire il corretto funzionamento di tale strumentazione ed evitare danneggiamenti. The air quality class shall be equal to (see below tables, ISO 8573-1:2010): - level 6 (for the particles mass concentration); - level 3 or better (considering...

Table 1 - Compressed air purity classes for particles As specified by the equipment user or supplier and more stringent than class 1 Table 2 - Compressed air purity classes for humidity and liquid water Concentration of total oil (liquid, aerosol and vapour) [mg/m3] As specified by the equipment user or supplier and more stringent than class 1 Table 3 - Compressed air purity classes for total oil _____________________________________________________________________________________ STI S.r.l. – Via Dei Caravaggi 15, 24040 Levate (BG) – ITALY www.imi-critical.com Manual