53
Drain valve
Description
The drain valve is a motor-operated diaphragm
valve which allows rapid emptying thanks to its
large cross-section. This is a self-clearing design,
so there is no need for a lint filter.
Main parts of the valve:
•
motor plus gear
•
piston rod with trapezoidal thread, plus piston
and return spring
•
rubber diaphragm
•
connections for water filling, overfilling, drain
In its open state, the valve is not energised. In
this state the piston rod is screwed down to its
lowest position by the return spring. The
diaphragm is pressed downwards with the piston
and the valve is open.
62
Fig.
62
4748
4747
Nipple for sensor hose
for level control
Riser to wash
drum
Connection for
water filling
Diaphragm -
closed
position
Diaphragm -
open position
Piston rod
Guide pin
Motor
Gear wheel
Return spring
Fig.
63
63
Mechanical and electrical design
