This drive element was designed for the conditions stated in the technical
data sheet. LEWA does not accept any responsibility when these conditions
are changed. This could lead to conditions resulting in major problems up to
the destruction of the metering pump. Danger to persons, animals and the
environment cannot be excluded in this case!
LEWA also does not accept any responsibility if the fluid conveyed or other
important operating conditions have been given partially only or not at all.
1.4 Safety
Refer to operating instruction B 0.100.1.
1.5 Supply connections
Refer to operating instruction B 0.100.1.
1.6 Emissions
Refer to operating instruction B 0.100.1.
2
Transportation and intermediate storage
Refer to operating instruction B 0.100.1.
3
Product information
See fig. 1.
3.1 General description
The drive element changes the rotary motion, induced by the drive motor, into an oscillating
(reciprocating) movement. The stroke length can be set from 0 to 15 mm in steps of 0.05 mm.
The stroke frequency results from the motor speed and the reduction ratio of the integrated worm gear.
3.2 Construction and method of operation
The drive element mainly consists of the worm shaft (19), the worm wheel (3), adjusting unit (7),
connecting rod (10) and the manual stroke adjustment.
The drive element works on the linear thrust crank principle. The worm shaft (19), which is coupled to
the drive motor, transmits the rotary motion via worm wheel (3) to the adjusting unit (7).
The latter actuates the plunger (502, refer to assembly “Diaphragm pump head”) via the connecting
rod (10).
The plunger stroke length is adjusted by turning the hand wheel (21). The adjusting unit changes the
eccentricity of the connecting rod (10) and so the plunger stroke length.
The stroke length can be altered both with the metering pump stopped or running.
The relationship between the adjustment path and change of plunger stroke length is linear.
3.3 Dimensions / weights / centres of gravity
Refer to operating instruction B 0.100.1.
4
Erection and assembly
Refer to operating instruction B 0.100.1.
3
Drive element LEWA - ecosmart® type LCA manual stroke adjust., motor vertically B 1.660 en
