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GES_FE51-52-53SP+FE121SP_1116.docx
3. Description
3.2 Functional
description
Cylinder pressure regulators of the FE51/52/53-SP and FE121-SP Series are single-stage cylinder pressure
regulators with pressure gauges for measurement of the inlet and outlet pressure. The main task of the
cylinder pressure regulator is to reduce the inlet pressure to the outlet pressure required for the specific
application.
The maximum inlet pressure depends on the specific application and will normally vary during operation.
The outlet pressure should remain as constant as possible. The outlet pressure is set via the pressure
regulator handwheel.
The fittings described here are equipped with various valves depending on the variant (see diagrams in
Section 3.1) for purging of the cylinder pressure regulator itself or the connected pipe system.
The purging process serves three essential purposes – above all in the context of gas applications for
sensitive processes and / or with toxic / corrosive gas applications:
1. In certain processes for which specific gas atmospheres are required, it is necessary to prevent the
surrounding atmosphere penetrating into the pipe system connected downstream of the pressure
regulator, as a disturbance in the process associated with the gas application would otherwise be
caused. This is prevented by purging with process gas or purge gas.
2. Before opening a gas supply system operated with toxic or corrosive gases on the side of the
surrounding atmosphere, it must be ensured that these gases cannot escape into the environment,
as there is otherwise a risk of injury to personnel or damage to property. The purging process also
prevents this undesirable outcome.
3. Purging fittings used with corrosive gases also extends the service life of the fittings.
The correct procedure for carrying out the purging processes is described in detail for each type of cylinder
pressure regulator in Sections 4.2 to 4.8.
3.3 Technical
data
Note!
The technical data can be taken from the Spectron data sheet for the relevant product. If this is
not available, you can view and download it at www.spectron.de.
The maximum inlet and outlet pressures and the gas type are indicated on the type plate.