17
2.2.3
2.2.2
12
Technical description
The purpose of the safety valves (see figure 7) is to protect the machine (and the cylinders) from
overpressure.
These valves are pre-calibrated in the factory at the following pressures:
- safety valve for 1
st
stage: 8 bar;
- safety valve for 2
nd
stage: 50 bar;
- safety or final valve for 3
rd
stage: 225 bar - or 330 bar.
WARNING
Under no circumstances may these valves be altered to increase the calibrated pressure.
If these valves should come into operation, check the cause that has led to the maximum pressure and
take steps according to the instructions given in paragraph 12.1.
Any tampering with the safety valves causes serious damage and an immediate cancellation of the
guarantee.
Head unit (Fig. 12)
Safety valves
The head unit includes the discharge and intake
valves.
The head of the 1
st
stage is of a lamellar type and
includes both the intake and the discharge.
The intake and discharge valves are located directly
in their threaded seats of the heads of the 2
nd
and
3
rd
stages.
The intake valves can be removed using the special
pin wrench (cod. SC000480), having first removed
the heads.
The discharge valves can be removed from the
outside.
See Chapter 11, “Maintenance”.
Summary of Contents for MCH 13/DH
Page 93: ...93 13 2 Electricals diagrams Machine diagrams...
Page 94: ...94 Machine diagrams...
Page 106: ...106 153 152 156 155 154 158 097 157 159 160 198 188 187 189 Spare parts Filtering system...
Page 110: ...110 MCH 13 16 ETC Spare parts 006 007 008 009 005 012 013 010 011 002 001 003 004...
Page 112: ...112 MCH 13 16 ET Spare parts 006 007 008 009 005 012 013 010 011 002 001 003 004 015 014 016...
Page 114: ...114 MCH 8 EM Spare parts 006 007 008 009 017 012 013 010 011 002 001 003 004 015 014 016...
Page 116: ...116 MCH 13 16 SH Spare parts 006 007 008 009 018 012 013 019 020 002 001 003 004...
Page 118: ...118 MCH 13 16 DY Spare parts 015 014 003 004 002 001 022 023 009 016 007 008 021 006 012 013...
