13
O ring
Diaphragm
Center disk
Air chamber
Tie rod
Fig.7-16
7.2 Inspection
・
Diaphragm
If the diaphragm is worn out or damaged, replace it
with a new one.
Guideline of diaphragm life
(when used with clean water at room temperature)
DP
－
10Fi
12,000,000 cycle
DP
－
20Fi
6,000,000 cycle
・
Center rod [Fig.7-13]
Measure the diameter, and if it is out of the allowable
range, replace the center rod with a new one.
Allowable range
DP
－
10Fi, DP
－
20Fi
φ
17.95
～
φ
18.05 mm
・
Sleeve [Fig.7-14]
Measure the inside diameter, and if it is out of the
allowable range, replace the sleeve with a new one.
Allowable range
DP
－
10Fi, DP
－
20Fi
φ
18.02
～
φ
18.10 mm
・
Guide [Fig.7-15]
Measure the inside diameter, and if it is out of the
Allowable range, replace the guide with a new one.
Allowable range
DP
－
10Fi, DP
－
20Fi
φ
18.02
～
φ
18.10 mm
7.3 Installation
For installation, see [Exploded View] on the separate sheet and install in the reverse order of
disassembly.
・
Install the diaphragm so that its protruded
part can face the inside. [Fig.7-16]
・
An auxiliary board attaches a thick board side
outside.
Tightening torque for the tie rod
DP
－
10Fi/
□
/R
DP
－
20Fi/
□
/R
5 N
･
m
＜
NOTE
＞
－
Make sure that there is not any dust on the
seal surface and that any sealed part cannot
be damaged.
－
Manually tighten the center disk until it
stops.
－
Tighten the tie rod with uniform force.
－
Retighten the tie rods immediately before
starting the pump.
Sleeve
Guide
Guide holder
Center rod
Reinforcement plate
Part to measur
e
Fig.7-13
Fig.7-14
Fig.7-15