Head Unit; Safety Valves - Coltri Sub MCH 13/ET Compact Instruction Manual

Head unit (Fig. 10) Head unit (Fig. 10) Head unit (Fig. 10)
Head unit (Fig. 10) Head unit (Fig. 10)
10

Safety valves

Safety valves Safety valves
Safety valves Safety valves
The purpose of the safety valves (see figure 5) is to protect the machine (and the cylinders) from
overpressure.
These valves are pre-calibrated in the factory at the following pressures:
st
- safety valve for 1 stage: 8 bar;
- safety valve for 2 nd stage: 50 bar;
- safety or final valve for 3
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.
Technical description
rd
stage: 225 bar - or 330 bar.
WARNING
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
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".
13
2.2.2 2.2.2 2.2.2
2.2.2 2.2.2
nd and
2.2.3 2.2.3
2.2.3 2.2.3 2.2.3