LEYBOLD SCROLLVAC plus - Gas Ballast Adapter

8.1.2Gas ballast adapter
The gas ballast adapter ts in place of the gas ballast control. The gas
ballast adapter allows connection of a controlled supply of inert gas such as
nitrogen into the low vacuum stage of the pump.
The gas purge can be used to dilute ammable gases down to a safe
level (We recommend 1/4 of the Lower Explosive Limit). An inert purge can
also be used to reduce the likelihood of gas vapours such as iodine from
condensing at the outlet stage of the pump.
Accessory Part number
Maximum supply
pressure
Gas ballast ow
Gas ballast adapter
(no restriction)
141100A02 1 bar (absolute) Standard*
Gas ballast adapter
(ne restriction)
141100A03 1.5 bar (absolute)
0.5 l min
-1


Supplied equipment: Gas ballast adapter, O-ring 19.6ID x 2.4
Installation
Make sure the pump is switched OFF before tting. Refer to


.
1. Undo the 2 off retaining bolts and partially remove the fan cowl.1.
Note:

2. Carefully disconnect the cooling fan electrical supply lead and remove2.
the fan cowl.
3. Using a 21 mm AF spanner, remove the gas ballast control assembly.3.
4. Carefully remove the gas ballast control seat and O-ring.4.
5. Assemble the gas ballast adapter and new O-ring, make sure the O‑ring5.
and seal surface are clean and free of dust or dirt.
6. Reconnect and assemble the cooling fan supply lead and fan cowl in6.
reverse order. Torque the retaining bolts to 3 Nm.
As a precaution, we recommend that a complete vacuum leak check be
performed following this installation.
Make sure the cooling fan operates correctly following the installation of the
gas ballast adapter.
Retain the gas ballast control assembly and seat for future use if required.
48 300668736_002_C7 - © Leybold
Accessories