Edwards nXDS Series, Инструкция по эксплуатации

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Gas ballast adaptor blank
A735-01-840 Issue B
2 Gas ballast adaptor blank
2.1 Description
The gas ballast adaptor blank ( Figure 1 , item 1) allows conversion from a standard nXDS pump into an nXDS-R pump.
The gas ballast control is replaced with a blank adaptor to prevent accidental air admittance into the pump. This
feature is also useful for applications such as rare gas recirculation or gas recovery.
2.2 Installation
2.2.1 Install the gas ballast adaptor blank
The method for installing the gas ballast adaptor blank follows some of the stages used to install the gas ballast
adaptor. To install the gas ballast adaptor blank, refer to stages 1, 2, 3, 4 and 6 of the gas ballast adaptor fitting
instructions in
Section 3.3.1 . For the instructions on how to fit the adaptor blank refer to the instruction and Figure 2
below.
Using a pin spanner (not provided), fit the adaptor blank and tighten to 6 Nm.
Figure 2 - Gas ballast adaptor blank fitting
Note: As a precaution, Edwards recommends that a complete vacuum leak check be performed following this
installation.
Table 1 - Gas ballast adaptor blank - checklist of components (A735-01-806)
Qty Description Check (

)
1 Gas ballast adaptor blank 
1 O-ring 19.6ID X 2.4 