Edwards E2M30

Figure 1 General view of the pump
1. Oil ller 2. Outlet nozzle
3. Gas-ballast control 4. Gas-ballast inlet
5. Centring-ring and O-ring (supplied) 6. Inlet-port (adaptor ange)
7. Cable-gland/Amphenol connector
posion
8. Motor terminal box
9. On/O switch
10. Box secon skids 11. Oil drain-plug (gravity drain)
12. Oil sight-glass 13. Pump idencaon label
14. Oil drip tray
1. Oil ller 2. Outlet nozzle
3. Gas-ballast control 4. Gas-ballast inlet
5. Centring-ring and O-ring (supplied) 6. Inlet-port (adaptor ange)
7. Cable-gland/Amphenol connector
posion
8. Motor terminal box
9. On/O switch
10. Box secon skids 11. Oil drain-plug (gravity drain)
12. Oil sight-glass 13. Pump idencaon label
14. Oil drip tray
Note:
A pump with a single-phase motor is shown in this gure. The motor shown in this gure
is not representave of the motor used on the E2M28 (Amphenol) pump with item
number A37317984. On this pump, cable-gland/amphenol connector posion and on/o
switch are transposed, with cable-gland/amphenol connector posion being an
IEC60320 16-20 Amp socket.
2.4 Gas-ballast
To pump high vapour loads, gas-ballast is delivered into the pump to prevent
condensaon of the vapour carried by the pumped gases.
Air (or another gas) can be introduced into the low vacuum stage through the gas-ballast
control. The gas-ballast control is a mul-turn valve which can be adjusted, as required,
between closed and fully open.
Page 11
A37310880_V - Introducon