VACUUBRAND MV 2 VARIO - Manual (Page 34)

page 34 of 41
Documents are only to be used and distributed completely and unchanged. It is strictly the users´ responsibility to check
carefully the validity of this document with respect to his product. manual-no.: 999035 / 15/12/2009
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Notes regarding the assembling of the diaphragm
The set of seals is designated for diaphragm pumps with different technical performance.
Delivering pumps with square hole diaphragm starts in the second term of 2002, but not at the same time
for all types of pumps.
Replacing a diaphragm with round hole, use the delivered diaphragm completely.
Replacing a diaphragm with square hole, remove the punched part in the centre of the diaphragm before
assembling.
☞ Check diaphragm for damage and replace if necessary.
➨ To do so use Phillips screw driver to remove four counter-
sunk head screws and lift off housing plate together with
fittings and manifold.
☞ Use petroleum ether or industrial solvent to remove depos-
its if necessary. Do not inhale.
Replacing a diaphragm with square hole
➨ Use a face wrench to remove diaphragm support disc.
Check for washers. Do not mix the washers from the different
heads. Make sure that the original number is reassembled at
the individual pump head.
☞ Smaller number of washers: The pump will not attain final
vacuum. More washers: Clamping disc will hit head cover;
noise or even blockade of the pump.
Position new diaphragm between diaphragm clamping disc with
square head screw and diaphragm support disc.
☞ Note: Double diaphragm.