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BE_55+56-2U_1212.docx
Operating Manual
of the BM and BE series
1. Introduction
In addition, the outlet pressure drops in the single-stage version at switchover from the operational side to
the reserve side. This does not happen with two-stage pressure relief.
The 2U pressure control panels are two-sided pressure control panels with a switching mechanism (2U).
The switching mechanism switches automatically from the side that is currently in operation to the reserve
side when the gas supply situation requires it. The lever position of the switching mechanism indicates
which side is the operational side and which the reserve side.
All of the above pressure control panels are equipped with a process gas valve and a waste gas valve on
each side.
With regard to both the outlet to the supply line and the pressure regulator relief valve, you can choose
between two versions:
Pressure regulator with outlet adapter: the outlet and relief valve are located parallel to each other at
the top.
Pressure regulator with outlet adapter and valve: the outlet and relief valve are located parallel to each
other at the top, but there is also a shut-off valve in the outlet.
Contact pressure gauges, pressure transducers and pneumatically operated valves can also be configured
for each of the above versions.
1.3
Intended use
Intended use
The BM55-2U and BM56-2U pressure control panels described are intended for use with non-corrosive
gases up to a purity grade of 6.0. The BE55-2U and BE56-2U pressure control panels are suitable,
in addition, for corrosive gases up to a purity grade of 6.0. The permissible gases and pressure ranges are
specified on the type plate. Pressure control panels reduce a variable inlet pressure to an outlet pressure
that is as constant as possible.
The pressure is introduced exclusively via the process gas valve. Appropriate measures must be taken to
prevent the introduction of pressure to the pressure regulator outlet via the pipe system.
Pressure control panels without electrical components (such as a contact pressure gauge or pressure
transducer) may be used in potentially explosive atmospheres, since they do not have a potential ignition
source of their own (ignition hazard evaluated in accordance with DIN EN 13463-1).
The danger of ignition has to be taken into account with pressure control panels with electrical components.
It is imperative that this is evaluated on the basis of the documentation of the electrical components,
taking into consideration how they are incorporated into the system as a whole, in compliance with
directive 94/9/EC (ATEX 95). The user can get more detailed information on the Internet at
www.spectron.de or directly from the customer support staff at Spectron Gas Control Systems GmbH.
Foreseeable misuse
The following operating conditions are deemed to constitute misuse:
Operation with gases that are not specified on the type plate
Use with gases in their liquid state
Operation outside of the permissible technical limit values
Failure to heed and comply with any applicable legal regulations and other provisions
Failure to follow the instructions in this operating manual
Failure to carry out inspection and maintenance work
Failure to heed the information on the type plate and in the product data sheet
Pressurisation in reverse
