Tacmina PW Series, Руководство по эксплуатации

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34
Maintenance
Maintenance precautions
■
Replacing the relief valve
When the relief-valve function has been triggered by blockage of the discharge side pipe or by some other factor, take
the following steps.
• Immediately stop the pump, remove the cause of the trouble and take steps to prevent recurrence.
• The relief valve is a consumable part so replace it once it has been triggered.
■
Replacing the air-release nozzle
Hold the colored area in the figure in place using a wrench (7 mm width across flat), remove the old nozzle and install
the new one.
OPEN
CLOSE
NOTE
• The duckbill valve can sometimes come out from the air-release nozzle.
Be careful not to lose the duckbill valve when handling it.
✽ The duck bill valve is not provided for the air-release nozzle of
FTCE/FTCF/FTCT types.
Duck-bill valve
O-ring
■ When replacing the valve seat area or diaphragm
• Install the O-ring, ball stopper and check ball while ensuring that they are oriented in the correct directions.
•
When removing the top and bottom joints and then re-assembling them, check that the top joint is not mistaken for the
bottom joint and vice-versa.
• Check that the O-ring and check ball are not damaged and that the valve seat area is free of damage and dirt.
IMPORTANT
• When re-assembling the valve seat set
in the pump head, check that it is not
installed upside-down.
• If, with the DCLPW or CLPW , the discharge
side and suction side valve seats are installed
in reverse, the pump’s performance will be
reduced. Refer to the figure on the right, and
assemble these seats correctly.
• When securing the pump head using the head bolts, tighten each bolt uniformly
a little at a time in sequence as shown in the figure on the right. If, for example,
the bolts are tightened up in the sequence of 1
3 2
4, the tightening will be
uneven, and the chemical liquid may leak from the pump head.
• When attaching the diaphragm, turn it in the clockwise direction until it stiffens.
If the diaphragm is loose, it will come in contact with the pump head, which may
cause malfunctions and damage.
Top
Bottom
Valve seat
Discharge side Suction side
Valve seat Ball stopper Ball stopper
Back : Engraved mark “CL”
CL
Back : No engraved mark
1 3
4 2
33-66(白)̲EM-127̲PW(E).indd 34 2014/11/17 11:56:42