10
6.3 Installation
For installation, see [Exploded View] on the separate sheet and install in the reverse order of disassembly.
Tightening torque for Valve body installation bolts
DP-20F/P 2
N•m
DP-25F/P, DP-25F/C
DP-38F/P, DP-38F/C
7 N•m
<NOTE>
▪
Make sure the sealing surface is not dirty or damaged.
▪
Securely insert the caps into the body by turning them
until they reach the body surface.
▪
Retighten the tie rods before starting the pump.
(See [7. Retightening of tie rods])
7. Retightening of Tie rods
▪
Due to the nature of resin, the dimensions of the pump may
vary according to operating temperature or across the ages.
Check each sealed part for leaks periodically and retighten
the parts indicated by arrows.
▪
Retighten the tie rods in the following situations:
①
immediately before using the pump,
②
at the time of quarterly inspections (or biannual if the
room temperature, such as in a clean room, is
maintained within plus or minus 5°C of the ambient
temperature),
③
when restarting the pump at low temperature which has
stopped running because ambient temperature or liquid
temperature became too high, and
④
if a leak is found on a daily inspection.
Retightening torque of the tie rods
Horizontal tie rods
Vertical tie rods
DP-20F/P
6 N
･
m 4
N
･
m
DP-25F/C
8 N
･
m 6
N
･
m
DP-25F/P
8 N
･
m 8
N
･
m
DP-38F/P, DP-38F/C
13 N
･
m 13
N
･
m
＜
NOTE
＞
▪
Retighten the nuts evenly and alternately in a diagonal
sequence to the specified torque.
▪
Be sure to retighten the horizontal tie rods FIRST, and
then the vertical tie rods. [Fig.7.1]
(Fig.7.1 shows the DP-38F/P.)
Fig.7.1
Summary of Contents for DP-20F/P
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