BOC E2M28, Instruction Manual

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E2M28 and E2M30 Rotary Vacuum Pumps
IN
STALLATION
PAGE
12
Issue K 12 Jul 05
3.2 System design
Consider the following points when you design your pumping system:
• Use a suitable inlet-valve to isolate the pump from your vacuum system if you need to allow the
pump to warm up before you pump condensable vapours, or if you need to maintain vacuum when
the pump is switched off.
• Avoid high levels of heat input to the pump from the process gases, otherwise the pump may
overheat and seize, and cause the motor thermal overload device to open.
• If you use the pump in a high ambient temperature and have a high gas throughput, the temperature
of the pump-body may exceed 70
o
C and you must fit suitable guards to prevent contact with hot
surfaces.
• Make sure that the exhaust pipeline cannot become blocked. If you have an outlet-isolation valve,
make sure that you cannot operate the pump with the valve closed.
• Provide for a purge of inert gas when you shut down the pumping system, to dilute dangerous gases
to safe concentrations. A suitable gas-ballast control valve for introduction of purge gas into the
pump is available as an accessory (see Section 7.4.15).
3.3 Unpack and inspect
1. Remove all packing materials and protective covers and check the pump. If the pump is damaged,
notify your supplier and the carrier in writing within three days; state the Item Number of the pump
together with your order number and your supplier's invoice number. Retain all packing materials
for inspection. Do not use the pump if it is damaged.
2. Check that your package contains the items listed in Table 7. If any of these items are missing, notify
your supplier within 3 days.
If the pump is not to be used immediately, replace the protective covers. Store the pump in suitable
conditions, as described in Section 6.1.
Quantity Description Check (
!
)
1 E2M28 or E2M30 rotary vacuum pump
!
(1) Fitting pack containing the following:
1 NW25 centring-ring
!
1 ‘O’ ring for centring-ring
!
1 Receptacle connectors *
!
* Various sizes: supplied with single-phase motors except for pumps with
Item Numbers A373-16-903 and A373-17-984.
Table 7 – Checklist of items