Buchi Vacuum Pump V-710 Manual de usuario descargar pdf (Pagina 46)

7 Maintenance and repairs

46 V-700/710 Operation Manual, Version E

• When all replacement work is done, reas-

semble the pump head in the reverse order.

NOTE

When remounting the valve head, ﬁx the four

screws slightly at ﬁrst, and then tighten them

crosswise (recommended torque 5.5 Nm).

Fig. 7.2: Disassembling and reassembling the valve heads

7.5 Working with strong acids

ATTENTION

Always wear personal protective equipment such as protective eye goggles, protective clothing and

gloves when operating the instruments with strong acids or bases.

In case you distill strong acids or bases, we recommend highly that you rinse the pump after the distil-

lation process to increase the lifetime of the instrument.

To rinse the pump, proceed as follows:

• Suck 5–10 ml of water through the pump inlet and recollect it again directly behind the pump

outlet.

• Check the pH value of the water leaving the pump and repeat the rinsing procedure until the value

is between a pH of 3–9.

• Now dry the pump by sucking air through it for 2–3 minutes.

7.6 Customer service

Only authorised service personnel are allowed to perform repair work on the instrument. These

persons have a comprehensive technical training and knowledge of possible dangers which might

arise from the instrument.

Addresses of ofﬁcial BUCHI customer service ofﬁces are given on the BUCHI website under:

www.buchi.com. If malfunctions occur on your instrument or you have technical questions or applica-

tion problems, contact one of these ofﬁces.

The customer service offers the following:

• Spare part delivery

• Repairs

• Technical advice

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Buchi Vacuum Pump V-710 Manual de usuario Pagina 46