5-3
5.2.2. How to attach the mechanical seal
Caution
Do not directly touch the sliding surface of the mechanical seal. In
addition, ensure that no dust, dirt, etc. will adhere to it.
■
ASVM(N)(G) 25, 32 series
(1) To prevent the operation of the pump during work, check that the main power is turned off.
(2) Insert the mechanical seal into the main shaft of the pump.
(3) Fix the mechanical seal to the casing using the hexagon socket bolts
.
(4) Push the main shaft of the pump downward, and check that the main shaft system is completely
located at the lowest position.
(5) Temporarily fix it to the main shaft of the pump using three set screws
.
(6) Move the main shaft of the pump upward, and insert the plate
into the clearance at the upper part of
the mechanical seal.
(7) Use a proper crane to install the motor. (For motors with an output of 7.5 kW or less)
(8) Pass the parallel pin through the holes of the main shaft of the pump and coupling.
(9) Adjust the coupling so that the uniform clearances are created on both of its sides, fix it using the fixing
bolts
.
[* Recommended tightening torque: 13 [N
･
m] (M6 screws), 31 [N
･
m] (M8 screws), 62 [N
･
m] (M10
screws)]
(10) Remove the plate
. Loosen the three set screws
to ensure that there is no clearance at the upper
part of the mechanical seal.
(11) Uniformly tighten the three set screws
.
[* Recommended tightening torque: 2.5 [N
･
m] (M5 screws), 8 [N
･
m] (M6 screws)]
(12) Rotate the coupling by hand.
Check that the shaft rotates smoothly and that rotation is not unusually difficult.
(13) Attach the coupling guard, and tighten the screws.
This completes the installation work of the mechanical seal.
Note
The Teflon ring of the mechanical seal may wear at an early stage of
operation of the reassembled pump, but it is not a failure of the pump or
the mechanical seal.
Figure 5-2-2: How to attach the mechanical seal
(ASVM(N)(G) 25, 32)
Parallel pin
(6) Move the main shaft of the
pump upward, and insert the
plate
into the clearance.
Plate
④
[For the models of ASVM(N)(G) 25 and 30]
]
Ensure that the clearances
are uniform.
<Coupling>
<Inner structure of the pump>
Main shaft of the pump
