YAMADA Global Series, Руководство по обслуживанию

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7
5.2 Inspection
▪ Diaphragm
If the diaphragm is worn out or damaged, replace it.
New replace just one diaphragm.
Guideline of diaphragm life
A_, S_
NBR, PTFE 10,000,000 cycle
TPO 15,000,000 cycle
P_
PTFE
（
Including backup diaphragm
）
7,000,000 cycle
TPO 10,000,000 cycle
▪ Center rod [Fig.5.8]
Measure the diameter, and if it is outside the usable range,
replace the center rod.
Usable range of center rod
Ø0.6280 ~ ø0.6299 in {ø15.95 ~ ø16.00 mm}
5.3 Installation
For installation, see [Exploded View] on the separate sheet and install in the reverse order of disassembly.
■
A_, S_ Type
▪ Apply grease to the center rod, and insert it into the main
body.
▪ Keep the convex side to the outside for diaphragm.
▪ For the model with PTFE diaphragm, put the O rings into
both side of the diaphragms. (cf. Fig.5.9, Fig.5.10).
▪ A_ type: Tighten the nuts.
▪ S_ type: Apply screw glue on the thread of center rod, then
tighten the center disks.
▪ Assemble the out chamber. Bolts should not be fully
tightened at this point.
▪ Place the pump on flat surface, stand the pump upright and
tighten all the bolts fully.
Tightening torque for center rod and out chamber
Center rod Out chamber
160 in-lbf {18 N-m} 105 in-lbf {12 N-m}
<NOTE>
▪ Make sure there is no dust on the seal surface in order to
prevent seal damaged.
▪ Replace the PTFE O ring by new one.
▪ Tighten the bolts that balance should be equal from both side
on diagonal line with even torque.
Fig.5.8
Fig.5.10
S_ Type
Fig.5.9
A_ Type