Gas-Ballast; Figure 1 General View Of The Pump - Edwards E1M18 Instruction Manual

Figure 1 General view of the pump

1. Oil filler 1. Oil filler
3. Gas-ballast control 3. Gas-ballast control
5. Centring-ring and O-ring (supplied) 5. Centring-ring and O-ring (supplied)
7. Cable-gland/Amphenol connector 7. Cable-gland/Amphenol connector
position position
10. Box section skids 10. Box section skids
12. Oil sight-glass 12. Oil sight-glass
14. Oil drip tray 14. Oil drip tray
Note:
A pump with a single-phase motor is shown in this figure. The motor shown in this figure
is not representative of the motor used on the E1/E2M18 pumps with Item Numbers
A34317984 and A36317984. On these pumps, Cable-gland/Amphenol connector position
and On/Off switch are transposed, with Cable-gland/Amphenol connector position being
an IEC60320 16-20 Amp socket.

2.4 Gas-ballast

When using the pump with high vapour throughputs, the gas-ballast facility should be
used to prevent condensation of the vapours inside the pump. The condensates will
contaminate the oil, will cause performance to deteriorate and may cause corrosion of
the pump mechanism.
Air (or an inert gas) can be introduced into the pump mechanism through the gas-ballast
control
A34310880_T - Introduction
(Figure: General view of the pump on page
2. Outlet nozzle 2. Outlet nozzle
4. Gas-ballast inlet 4. Gas-ballast inlet
6. Inlet-port (adaptor flange) 6. Inlet-port (adaptor flange)
8. Motor terminal box 8. Motor terminal box
9. On/Off switch 9. On/Off switch
11. Oil drain-plug (gravity drain) 11. Oil drain-plug (gravity drain)
13. Pump identification label 13. Pump identification label
11).
Page 11