１７
4)
Replacing DAL-361S 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)
Use the same procedure as steps (1)-(4) in 3) Replacing DAL-181 Unit Valves and
remove the pump heads and valve retainers. Use solvent to clean the valve
retainer and the area on the pump head where the valve is fitted. (Photo 18,19.)
(2)
Fasten one valve A (marking downward) to all pump head inlets (slot) and then
one valve C, one valve clamp B and one valve clamp A in that order to the outlets
(holes). (Photo 23.)
(3)
Position the valve retainer on the pump head as shown in Photo 24 and fix it in
place with the hexagonal bolts (M5
×
16). (Photo 24.)
Note: Fasten so that the inlet side of the valve retainer connects to the inlet side
(slot) of the pump head.
Note: Tighten diagonally opposite pairs of hexagonal bolts to 6N
･
m with the
torque wrench a number of times.
Note: When viewed from side-on, the O-ring should be hidden from view.
(4)
Fix the pump head in place, fit the piping and fix panels 1 and 2 in place. Use the
same procedure as 2)-3 Fitting Pump Heads in 2) Replacing Diaphragms.
Valve A (1)
Marking downwards
Valve C (1) Direction not specified
Valve clamp B (1) Direction not specified
Valve clamp A (1) Direction not specified
Inlet side
(slot)
Exhaust side
(hole)
Stage 1,2,3 and 4
Photo 23
Stage 1
Stage 2
Stage 3
Stage 4
Inlet side
(slot)
Exhaust side
(hole)
Photo 24
Inlet side
Exhaust
side
Valve retainer
