１５
3)
Replacing DAL-181D Unit Valves
It is recommended to replace valves at the same time as replacing diaphragms.
Use tools 1, 2, 3, 6, 7 and 8
(1)
Remove pump panels 1 and 2, piping and pump heads. Use the same procedure as
2)-1 Removing Pump Heads in 2) Replacing Diaphragms.
(2)
Reduce the risk of damaging the pump head by choosing a firm work surface and
covering it with a soft sheet. Position the removed pump head so that the valve
retainer is upwards.
(3)
Remove the valve retainer by removing the six hexagonal bolts (M5
×
16) that are
fastening it in place. (Photo 19)
(4)
Remove valve A, valve C, valve clamp A and valve clamp B. Use solvent to clean
the valve retainer and the area on the pump head where the valve was fastened.
(5)
Fasten one valve A (marking downwards) to the inlet (slot) of side 1 and side 2,
and then fasten one valve A (marking upwards) and one valve clamp A in that
order to the exhaust (hole). (Photo 20)
(6)
Fasten one valve A (marking downwards) to the inlet (slot) of side 3 and side 4,
and then fasten one valve C, two valve clamp Bs and one valve clamp A in that
order to the exhaust (holes). (Photo 21)
Stage 1, 2
Valve A (1) Marking upwards
Valve clamp A (1) Direction not specified
Photo 20
Stage 3, 4
Valve C (1) Direction not specified
Valve clamp B (2) Direction not specified
Valve clamp A (1) Direction not specified
Photo 21
Inlet side
(slot)
Exhaust side
(hole)
Valve A (1)
Marking
downward
Valve A (1)
Marking
downward
Stage 1
Stage 2
Stage 3
Stage 4
Hexagonal bolt
(M5
×
16)
Stage 1 valve
retainer
Photo 18
Photo 19
Stage 1 pump head
