Pressure Control Valve - Christ Alpha 3-4 LSCbasic Operating Manual

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5.8

Pressure control valve

CAUTION
1 Pressure control
valve
2 Connection to the
vacuum pump
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Version 11/2018, Rev. 1.9 of 01/12/2021 • sb
Translation of the original operating manuel
vacuum pump, or they must be filtered by way of a silencer with integrated
filter elements that is connected to the outlet of the vacuum pump.
Freeze-dryers with a dry-running vacuum pump require a silencer with filter
elements. The silencer is removed for transport and must be installed prior
to commissioning the freeze-dryer:
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Switch the freeze-dryer off.
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Clean the vacuum connector of the freeze-dryer with a cloth.
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Fasten the silencer to the vacuum connector by way of the supplied
centring ring and clamping ring.
The pressure control valve is integrated in the suction pipe between the
vacuum pump and ice condenser chamber. During certain, specified
process phases, it interrupts the volume flow to the vacuum pump (see
chapter 2.2.1 - "General information on freeze-drying")
Observe the installation direction of the pressure control valve.
Fig. 14: Installation of the pressure control valve
Freeze-dryer Alpha 3-4 LSCbasic
5 Set-up and connection
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