Tomoe 304YA, Инструкция по эксплуатации

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13
3. 6 Maintenance
3. 6. 1 Daily Inspection
Perform daily inspection on the following.
<Table-5> Daily Inspection Procedure
Inspection
Description
Inspection Points
Inspection
Procedure
Countermeasure
Fluid external
leakage
Pipe joints Visual check
Retighten the piping bolts and nuts.
Align the valve center with the pipe center and
retighten the piping bolts.
Bottom, valve surface Visual check
Disassembly and maintenance (Spare parts
replacement
*1
)
Valve replacement
Gland area Visual check Retighten the bolts.
Abnormal noise,
vibration
Appearance of the valve
and actuator
Piping around the valve
Bolts and nuts
Listening,
Check by touch
Change the valve opening. Review the flow
rate and pressure.
Retighten the bolts and nuts. Remove the
sources of vibrations.
Disassembly and maintenance (Check for
damage of the parts.)
Looseness of the
bolts and nuts
Bolts and nuts
Visual check,
Check by touch
Retighten the bolts and nuts.
Retighten the pressure part after reducing
pressure.
Seat leakage
Presence or absence of
leakage from the second-
ary side
(Flow meter, pressure
gauge, drain)
Listening,
Visual check,
Measurement
Check that the opening and closing positions
are correct with the indicator.
Remove foreign material by flushing water with
the valve fully open (section
3. 6. 6).
Remove the valve from the piping (section
3. 6.
7) and perform check and cleaning.
Replace
*1
pare parts
Valve operation
check
Check of opening and
closing positions
Manual valve: Operability
Automatic valve: Operation
Visual check,
Operational
feeling
Check that the opening and closing positions
are correct with the indicator.
Valve damage
check
Valve surface Visual check
If any damage is observed, stop use of the
valve and replace it.
*1 Replace the spare parts around after 3000 times of opening and closing (Open - Close - Open: 1 time) or
one year operation at room temperature using fresh water. The replacement timing may become faster de-
pending on the working environment. Please replace the spare parts (refer to the Expanded View in section
2.1) based on the number and term.
3. 6. 2 Periodic inspection
Perform periodic inspection on the following items once every 6 months.
<Table-6> Periodic Inspection Procedure
Inspection
Description
Inspection Points Inspection Procedure Countermeasure
Corrosion and
damage of the
disc
Disc
Remove the valve
from the piping and
perform visual check.
Valve replacement
Abrasion and
damage of the
Seatring
Seatring
Remove the Seatring
from the piping and
perform visual check.
Clean the disc and Seatring (section 3. 6. 3).
Replace
*1
pare parts
Valve replacement.
Valve operating
condition
Valve, actuator
Opening/Closing
operation
Actuator replacement, valve replacement
*1 Replace the spare parts around after 3000 times of opening and closing (Open - Close - Open: 1 time) or
one year operation at room temperature using fresh water. The replacement timing may become faster de-
pending on the working environment. Please replace the spare parts (refer to the Expanded View in section
2. 1) based on the number and term.
3. 6. 3 Cleaning of the disc and disc stopper
For pneumatic cylinders and motors, before putting your hand in the valve, take precautions, such as shut-
ting off air sources and turning off the power, to prevent the actuation. It is very dangerous if your hand is
caught by the suddenly closing the disc. Particularly, for single-acting cylinder, it is necessary not only to
shut off power supplies but also to check that the operation pneumatic pressure has been released.
1) When removing this product from the piping and cleaning it for periodic inspection, etc., clean
the Seatring using a clean waste cloth/sponge, etc. and a neutral detergent or alcohol, while
avoiding scratches on the Seatring.
2) Clean the edge of the disc with a waste cloth.
3) Check for scratches and wear on the Seatring inner surface and the edge of the disc.
4) Check that no foreign material adheres to the disc stopper.