Grundfos DDC Data Booklet

Construction
23
SMART Digital S
4
DDE
Fig. 20 Sectional drawing, DDE
Construction
The DDE pump is a motor-driven diaphragm dosing
pump consisting of the following main parts:
Dosing head: Patented design with a minimum of
clearance space optimised for degassing liquids.
With integrated deaeration valve for priming and
venting complete with connection for a 4/6 mm or 0.17"
x 1/4" tubing.
Valves: Double-ball discharge and suction valve*
design for less clearance space - optimised for
degassing liquids. Spring-loaded valves for higher
viscosities are available as an option.
Connections: Robust and easy-to-use connection
packages for various sizes of tubing or pipes.
Diaphragm: Full PTFE diaphragm designed for long
life and universal chemical resistance.
Flange: With separation chamber, safety diaphragm
and drain hole.
Drive unit: Positive return crank with patented
noiseless spur gear drive, stepper motor, all mounted
in a robust gear housing.
Housing: Containing drive unit, control panel and
electronics with robust signal sockets. The housing
can be clicked on the mounting plate.
Material specification
TM04 1609 1710
1
2
3
4
5
6
7
11
12
13 15
14
21
20
22
23
16
17
18
19
8
9
10
Pos. Description Material options
1 Stepper motor -
2 Suction valve, complete** -
3 Valve ball, DN 4*
Ceramic Al
2
O
3
99.5 %,
SS 1.4401
4 Dosing head PP, PVC, PVDF, SS 1.4435
5 Safety diaphragm EPDM
6 Dosing head screw SS 1.4301
7 Diaphragm full PTFE
8 Dosing head cover PP, SS 1.4301
9 Deaeration valve PP, PVC, PVDF
10 Deaeration valve O-ring EPDM/FKM
11 Discharge valve, complete** -
12 Discharge valve O-ring EPDM, FKM, PTFE
13 Discharge valve ball, DN 8
Ceramic Al
2
O
3
99.5 %,
SS 1.4401
14 Discharge valve ball cage PP, PVC, PVDF, SS 1.4435
15 Discharge valve seat EPDM, FKM, PTFE
16 Flange PPO/PS 20 % gf
17 Connecting rod PA 6.6 30 % gf
18 Gear box PPO/PS 20 % gf
19 Housing PPO/PS 20 % gf
20 Hall sensor -
21 Capacity adjustment knob PPO/PS 20 % gf
22 Power PCB -
23 Mounting plate PPO/PS 20 % gf
* Only for pumps up to 6 l/h with standard valves
** Pump can be supplied with spring-loaded valves (Material: Tantal)

Grundfos DDC Specifications

General

Brand	Grundfos
Model	DDC
Category	Water Pump
Language	English