Spectron BE56-2U, Руководство пользователя

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Spectron Gas Control Systems GmbH Design and function | 4
GES_BE56-2U_0720 15
The switching mechanism links the pressure regulators with each other by their pressure adjust-
ing spindles. If you shift the lever from the upper position to the lower position, for example, this
reduces the outlet pressure in the pressure regulator on the left and increases the outlet pres-
sure in the pressure regulator on the right. The right-hand side is thus currently the operational
side. The automatic and interruption-free switchover to the reserve side on the left, where the
pressure is set lower, takes place as soon as the outlet pressure on the operational side (on the
right) drops to below that of the reserve side. This can happen as a result of the constant
emptying of the gas cylinders on the right and thus the falling of the inlet pressure on the opera-
tional side to under the level of the reserve side or as a result of very large amounts of gas be-
ing drawn, thus lowering the outlet pressure on the operational side quickly. Thus, if the reserve
side goes into operation, the outlet pressure made available by the switching panel is lower than
the outlet pressure made available by the operational side beforehand. The manual operation of
the switching lever helps here: it increases the outlet pressure of what has been the reserve
side, thus converting it into the operational side, and at the same time reduces the outlet pres-
sure of what has been the operational side up to now. As a result, it becomes the reserve side.
In the case of two-stage switching panels, the fall in the outlet pressure as a result of the
switchover is barely noticeable. The outlet pressure is kept largely constant by means of the
second regulating stage. All single-stage automatic switching panels have an inlet pressure
gauge for each pressure regulator to indicate the current inlet pressure. Since the pressure reg-
ulators are linked to each other on the outlet side, only one pressure regulator has the outlet
connection. The other one has the outlet pressure gauge.
4.3 Technical data
NOTICE
The technical data can be taken from the data sheet for the relevant product. If this is not avail-
able, you can view and download it at
www.spectron.de .
The maximum input and output pressures and the gas type are given on the identification or la-
bel.
4.4 Boundaries and interfaces
The scope of supply includes the product as described in the " Design [
}
13] " chapter. The trans-
fer points to process gas, exhaust air and auxiliary media (incl. power supply) are the connec-
tions on the pressure control panel or product.
The following areas and functions have not been included in the scope of supply from Spectron:
– other systems, lines and installations of the overall system
– Process gas source
– Exhaust air (this applies in particular to foreseeable problems, e.g. failure of the exhaust air
system)
– Supply of auxiliary media (compressed air, purge gas)
– Power supply
– Lighting
– Controller