Edwards nRVi, Instruction Manual

Page: 26 / 100

Table 9
Gas ballast control - High throughput mode
Gas ballast control - High Throughput mode
Ultimate total pressure
mbar Pa mbar Pa mbar Pa
3 x 10
-2
3
6 x 10
-2
(nRV4/6i)
6 (nRV4/6i)
1.2 x 10
-1
(nRV4i)
1.2 x 10
1
(nRV4i)
4 x 10
-2
(nRV10/14i)
4 (nRV10/14i)
1.0 x 10
-1
(nRV6i)
1.0 x 10
1
(nRV6i)
6 x 10
-2
(nRV10/14i)
6.0 (nRV10/14i)
Use for continuous inlet
pressure above 50 mbar/
5 x 10
3
Pa
Maximum water vapour pumping
rate
Maximum water vapour pumping
rate
0.04 kg h
-1
0.12 kg h
-1
(nRV4/6i)
0.20 kg h
-1
(nRV10i)
0.25 kg h
-1
(nRV14i)
3.4 Manufacturing materials
Table 10
Materials in contact with pumped gases
Material
Where used
High grade cast iron Pump shaft
Rotors
Cast aluminium Pump body
Oil box
Note:
All surfaces of the pump which are exposed to the pumped gases are free from copper,
zinc and cadmium.
3.4.1 Other materials of construction
Other materials of construction include:
▪ Fluorocarbon elastomer
▪ Nitrile
▪ Silicon
▪ Chemically resistant polymers
▪ Nickel
▪ Steel
▪ Stainless steel
▪ PPS (Polyphenylene Sulfide)
▪ Epoxy
▪ Rubber
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A65901880_D - Technical data