Seko MSA Series - Adjustment of Stroke Length

SPR0136037 Rev. 1.5
6
The operational principle is illustrated below:
1) As the membrane is drew back, the ball of discharge
valve drops on and cling to the valve seat , the ball of
suction valve is uplifted by vacuum formed between
membrane and pump head,correspondingly, the fluid is
also suctioned.
2

As the membrane is drew forward, the ball of suction
valve clings to valve seat ,so, the fluid can not pass
through, on the contrary, the ball of discharge valve is
uplifted by membrane’s forward movement.
To obtain high accuracy performances pump must
operate at ideal conditions: constant speed, pressure,
viscosity.
1.3 Adjustment of the stroke length
The adjustment of stroke length is realized by changing the stroke of membrane, and the
adjustment can only be done during pump operation.
MSA/MSV
The variation from 0 to 100% of the maximum flow rate is obtained by rotating the
adjustment knob counter clockwise; each revolution of the adjustment knob corresponds
to a variation of 1/4 of the maximum capacity. After adjustment, you need to lock the stroke
length.