Sleeve With Split Connections (Option Code S); Back Flushing System (Option Code Bf1, Bf2, Bf4, Bf5) - Dellmeco DM 08/10 Instruction Manual

16.5. Sleeve with Split Connections (option code S)

The pump size DM 10, 15, .., 50 P.. of the Plastic Series can be converted from a double-acting air-driven
diaphragm pump into two separated single-acting ones. The standard sleeve with one suction and one discharge
connection is exchanged for a sleeve with split connections, so with separate suction and discharge connections for
both pump chambers. By separation in two pump halves with the same drive there are two liquid streams in 1:1 ratio.
The illustrations on pages: 6, 8 and 10 show configuration of the split connections. The nominal port size is the
same as in standard sleeve (e.g. for DM 10 is G 3/8 ").
Spare part list, split connections
Code Position Quantity
S
64 2

16.6 Back Flushing System (option code BF1, BF2, BF4, BF5)

A
pump equipped with the back flushing system (ball lift system) can be emptied along with an inclining discharge
line while being installed within the plant. It consists of a bypass-system in the side housings which can be activated by
manual valves (code BF1, BF2) or pneumatically (code BF4, BF5).
Open the manual valves (BF1, BF2) by approx. 10mm by turning to the left (Attention: As there is no blocking of the
valves, it has to be ensured not to take them out completely). The pump should be kept in operation meanwhile. Slow
down the pump slowly and finally stop it.
The drawing below illustrates the flushing system (code BF4, BF5, minimum air pressure 3 bar). By attaching a 4-2-
way valve (not included in the delivery), the back flushing system can be activated automatically when cutting off the
pump.
Side housing O-rings are made of EPDM (code BF1, BF4) or FEP/FKM (code BF2, BF5).
Appearance of back flushing system
Manual Back Flushing System
67
36 I DELLMECO I AODD DIAPHRAGM PUMPS
Description
Sleeve with split connections
1
67
65
66
Pump size: DM 10
Material Part no.
PE 2 10 31 20
PE conductive 2 10 31 21
PTFE 2 10 31 23
PTFE conductive 2 10 31 24
Pneumatic Back Flushing System
67
DM 15 DM 25 DM 40
Part no. Part no. Part no.
2 15 31 20 2 25 31 20 2 40 31 20
2 15 31 21 2 25 31 21 2 40 31 21
2 15 31 23 2 25 31 23 2 40 31 23
2 15 31 24 2 25 31 24 2 40 31 24
1
67
65
71
DM 50
Part no.
2 50 31 20
2 50 31 21
2 50 31 23
2 50 31 24
73
66
72