VACUUBRAND BVC 21 - Manual (Page 19)

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.: 999054 / 15/12/2009
page 19 of 27
housing cover
Cleaning and inspecting the pump head:
housing
connecting rod
diaphragm support disc
diaphragm
head cover
diaphragm clamping disc
valve
washer
➨ Use open-ended wrench w/f 17, remove the screw-in fittings
together with the hose from the pump heads.
➨ To check the valves use hex key size 5 to remove four socket-
head screws from pump head and remove housing cover
with head cover and valves.
☞ Never remove parts by using a spiky or sharp-edged tool
(e.g. screw driver), we recommend to use a rubber mallet or
compressed air (to be blown carefully into port).
➨ Remove head cover carefully from housing cover. Note po-
sition of valves and remove them.
☞ Replace valves if necessary.
☞ Use petroleum ether or industrial solvent to remove depos-
its. Do not inhale.
View of the disassembled pump head parts