Diaphragm Pumps UN035_I EX
Servicing
19
8.3. Changing Diaphragm and Valves
8.3.1. Pumps with aluminum head
UN035_AN_I EX
UN035_TN_I EX
UN035_AT_I EX
UN035_TT_I EX
UN035_AV_I EX
UN035_TV_I EX
▪
Pump is switched off and mains plug is removed from the
socket
▪
Pump is clean and free of hazardous materials
Spare part*
Position**
Quantity per pump head
Diaphragm
(F)
1
Flathead screw*** (D)
1
Reed valve
(P)
2
Gasket
(V)
1
Tab. 7
* According to Spare parts list, chapter 10
** According to Fig. 11
***Not for .9 versions
Quantity Tools/Material
1
Allen key 3 mm
1
Allen key 4 mm
1
Allen key 5 mm
1
Screwdriver blade width 6.5
1
Screwdriver blade width 4.0
1
Fork wrench 16 mm (only for two-headed pumps)
1
Pencil
1
Adjustable pin
–
wrench for two-hole nuts or KNF
wrench for retainer plate (only for .9 versions)
Tab. 8
With multi-head pumps, parts of the individual pump heads can be
confused.
Replace the diaphragm and reed valves of the individual pump
heads consecutively.
WARNING
Health hazard due to dangerous substances
in the pump!
Depending on the substance transferred, caustic
burns or poisoning are possible.
Wear protective clothing if necessary, e.g.
protective gloves.
Flush pump with air before replacing the
diaphragm and reed valves (see section 8.2.1).
Conditions
Spare parts
Tools
Information on procedure
