10
DEPA
®
Air Operated Diaphragm Pumps
4.12
Downtimes ................................................................................................................................................25
4.13
Taking out of service ................................................................................................................................25
4.14
Waste disposal after expiry of the expected service life ............................................................................ 25
5.0
Maintenance ...........................................................................................................................................26
5.1
Inspection periods ....................................................................................................................................26
5.2
Cleaning ...................................................................................................................................................26
5.3
Dismantling and assembling ....................................................................................................................26
5.3.1
Series DL, DP, DZ, DF, DB, DH-PT/TL ......................................................................................................26
5.3.1.1 Replacement of diaphragms, valve seats and valve balls ......................................................................... 26
5.3.1.2 Replacement of elastomer components ................................................................................................. 27
5.3.1.3 Replacement of PTFE diaphragm .............................................................................................................27
5.3.1.4 Replacement of the internal control valve .................................................................................................29
5.3.1.5 Replacement of the external Q-valve ........................................................................................................30
5.3.1.6 Replacement of the external DEPA AirSave valve (DL15/25/40) ............................................................... 30
5.3.1.7 Assembling and disassembling the pressure booster (DB series) ............................................................ 30
5.3.2
Series DH-FA/SA/SS ................................................................................................................................30
5.3.2.1 Replacement of elastomer components ................................................................................................. 30
5.3.2.2 Replacement of diaphragms, valve seats and valve balls ......................................................................... 31
5.3.2.3 Disassembly of the control block ..............................................................................................................31
5.3.2.4 Replacement of internal valve ...................................................................................................................31
5.3.2.5 Replacement of the AirSave control valve (M-valve) ................................................................................. 32
5.4
Assembling the pump ...............................................................................................................................32
5.4.1
Assembling new clamp bands ..................................................................................................................32
6.0
Troubleshooting .....................................................................................................................................33
7.0
Active pulsation damper .......................................................................................................................35
7.1
Principle of function ..................................................................................................................................35
7.2
Recommended installation schematic ......................................................................................................35
7.3
Pulsation damper with diaphragm breakage monitoring ........................................................................... 36
7.4
Active pulsation damper with DEPA nopped E4 compound diaphragm .................................................... 36
8.0
Spare parts .............................................................................................................................................37
8.1
Spare parts storage ..................................................................................................................................37
8.2
Ordering spare parts .................................................................................................................................37
8.3
Spare parts kits .......................................................................................................................................37
9.0
Materials and pump coding .................................................................................................................42
9.1
Appendix “pump weights in kg” .................................................................................................................43
10.0
Category 1 and 2 equipment intended for use in potentially explosive environments ..................43
10.1
Equipment category 1 ...............................................................................................................................43
10.1.1 Design, housing and materials ..................................................................................................................43
10.1.2 Usage instructions ....................................................................................................................................43
10.1.3 Equipotential bonding ...............................................................................................................................44
10.1.4 Vibration distance .....................................................................................................................................44
10.1.5 Equipment category 1 accessories ...........................................................................................................44
10.1.5.1 The level control........................................................................................................................................44
10.2
Equipment category 2 (not the subject of discussion) ............................................................................... 44
10.3
Temperature information for category 1 and 2 equipment ........................................................................ 44
10.3.1 Surface temperature .................................................................................................................................44
10.3.2 Pumped medium temperature ..................................................................................................................44
10.3.3 Ambient temperatures ..............................................................................................................................44
10.4
Equipment intended for use in potentially explosive environments
Maintenance instructions for category 1 and 2 equipment ........................................................................ 45
11.0
Tightening torques .................................................................................................................................45
12.0
Information on the Declaration of No Objection if goods are returned ............................................52
