Description Of The Pump Unit - Coltri Sub MCH 13/ET Compact Instruction Manual

The intake air contains a certain degree of humidity according to atmospheric conditions. During the
compression and subsequent cooling, the humidity condenses and together with the particles of lubricating
oil forms a milky white emulsion that precipitates into the separators.
The compression diagram is included in chapter 13.

Description of the pump unit

Description of the pump unit Description of the pump unit Description of the pump unit Description of the pump unit
The pumping unit has the task of producing compressed air at high pressure (200-300 bar) and purifying
it by means of the decantation and filtering systems until it reaches a level of purity equal to or higher
than the limits set by the standards DIN 3188 - UNI EN 132 - CGA/E, or to increase the pressure of the
gas inhaled (only inert - non-explosive gases).
This unit consists of the following components (Fig. 5-6):
Table 1
N° Description
1 Intake filter
2
1 st stage head
3 2 nd stage head
4
3 rd stage head
5 1 st stage cylinder
6 2 nd
stage cylinder
7 3 rd stage guiding cylinder
8 st nd
1 -2 stage cooling pipe
9 2 nd -3 rd stage cooling pipe
10 Final cooling pipe
11
1 st stage safety valve
5
Technical description
N° Description
12 2 nd stage safety valve
13
Monobloc
14 Filter-holding bracket
15
Fan
16 Oil cap
17
Final condensate separator
18 Condensate separator between stages
19
Condensate discharge connection
20 Maintenance valve
21 Pipe-fastening bracket
22
3 rd stage or final safety valve
6
11
2.2 2.2 2.2
2.2 2.2