MCH 6 EM Explorer Nitrox - Submarine Manufacturing and Products ...

2.2.2
Head unit (Fig. 11)
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”.
11
2.2.3
Safety valves
The purpose of the safety valves (Fig. 12) is to
protect the machine (and the cylinders) from
overpressure.
The valve is pre-calibrated in the workshop at the
pressure of 225 bar (3400 PSI) or 300 bar (4500
PSI).
CAUTION
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.
12
16
Technical description