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PRX10 purge-restrictor
B580-65-880 Issue G
7 PRX10 purge-restrictor
7.1 Description
The PRX10 purge-restrictor (shown in Figure 28) sets the purge gas flow rate.
The following EXT pumps have a purge-port facility to allow you to purge the motor and bearing cavity with dry
nitrogen or other inert gas:
z EXT75DX, EXT75iDX.
z EXT250, EXT250H, EXT250Hi, EXT250M, EXT255DX, EXT255iDX, EXT255H and EXT255Hi.
z EXT 351 and EXT501 (all models).
z EXT555H, EXT555HF, EXT555Hi, EXT555H
E
and EXT556.
z EXT406PX and EXTPX split flow
Note that you will need a vent-port adaptor (see Section 9) to fit the PRX10 purge-restrictor.
7.2 Technical data
7.3 Installation
7.3.1 Unpack and inspect
Remove all packing materials and protective covers and check the PRX10 purge-restrictor.
If the PRX10 purge-restrictor is damaged, notify your supplier and the carrier in writing within three days; state the
Item Number of the PRX10 purge-restrictor together with your order number and your supplier's invoice number.
Retain all packing materials for inspection. Do not use the PRX10 purge-restrictor if it is damaged.
Table 6 - PRX10 purge-restrictor technical data
Nominal nitrogen flow rate
*
*
At a supply pressure of 0 bar gauge (1 x 10
5
Pa)
255 sccm, 0.42 mbar l s
-1
, 42 Pa l s
-1
Flange size NW10
Item Number B580-65-001
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