Depa DH40-FA - Pump Specifications; Usage in Explosive Environments

43
DEPA
®
Air Operated Diaphragm Pumps
wall clearances and flow velocities. It
is therefore essential to monitor the
pump during these processes. See
TRGS 727.
When using nopped E4
®
PTFE com-
pound diaphragms and PTFE dia-
phragms, in each case size 80, mi-
crofilters in the pump inlet are not
permitted. Multiphase insulating liq-
uids must not be pumped with DEPA
nopped E4
®
compound diaphragms
as well as PTFE diaphragms and PTFE
valve balls, in each case size 80.
In order to ensure correct functioning of the pump
themaximumpumpedmediumparticlesizeslisted
inthefollowingtablemustnotbeexceeded.
9.1 Pump weights in kg (for combinations with stainless steel seats or balls with core increase
the weight of the pump)
10.0 Category 1 and 2 equipment intended for use in potentially explosive environments
10.1 Equipment category 1
10.1.1 Design, housing and materials
*Max.operatingpressureforDHxx-SSoutsidezone0is8.6bar
Table 5 Materials and pump types
Material type
Pump type
code
Min (°C) Max (°C)
Max. operating pressure
(bar)
Stainless steel
DHxxSS
Temperature range is limited by interior
ttings
7 *
Table6:max.particlesizes
Pump size
Pump type DH SS
15 25 40 50 80
Particle size (mm)
5 8 11 13 18
10.1.2 Usage instructions
When using the pump in zone 0, only media with
a minimum conductivity of 10,000 pS/m (0.01
μS/m)maybepumped.
If substances penetrate the sealed
air valve through defective dia-
phragms (diaphragm rupture), pump
operation must be stopped immedi-
ately.
Inexplosiveenvironments,thepumpmustbe
monitoredinthecaseofincompletemedialling
(e.g.suctionandsnoremode),andifthereisuid
leakageattheexhaustoutlet(e.g.muer),the
pumpmustbeswitchedoandonlyputbackinto
operation further to being checked (see Section
6.0).
Themuerpermanentlydischargesrelieved
compressed air. This air can whirl up dust and
thusgenerateanexplosiveatmosphere.
When using the pump in zone 0,
start-up and pumping out proce-
dures are limited to a duration of <
0.5 minutes so that critical discharg-
es do not occur in the pump de-
pending on the size, corresponding
Pump size
DH-FA CA CX DL- SA/SF DH- SA DH- SS SX PM PP/PL DH-TP/TPL DL-SL/SU/UE DH-UE DB
15 2 - - 4,8 7 9,5 - 6 5 11,2 9 10 -
25 8,2 13 16 14 12 17 17 8,4 10 27 21 27 35
40 12 23 24 29 20 24 31 13 17 45,8 30 33 49
50 35,4 50 51 51 42 51 53 - 37 89 57 73 90
80 55 100 105 119 73 85 125 - 75 - 94 - -