12
Handling instructions
Because of the powerful magnetic force of this pump, extra precaution is necessary in addition to the
normal one such as dry running or reverse rotation operation.
1. People with pacemakers and other electronic devices for maintaining bodily functions do not use this
magnet pump. The inside magnet is more powerful than ordinary magnets used every day.
2. Do not place your hand between the magnets. If there are articles made of iron such as knives,
scissors or iron masses nearby, the magnet could attract to them in an instant, causing injury to the
hand holding the article or causing the plastic surrounding the magnets to crack.
3. Do not place floppy disks, computer memory or magnetic tapes, because they are easily magnetized.
Prohibited on conventional magnet pumps
1. Dry Running
Dry running generates friction heat at sliding parts such as the shaft and bearing and plastic parts
around them become deformed. As the result, the impeller eccentrically rotates, the pump does not
work properly and damaged.
⚫
If the pump is operated without priming liquid during the suction valve is closed, dry running
occurs.
2. Liquid with slurry
Basically, do not use the magnet drive pump for liquid with slurry. Even if thin liquid with slurry is
transferred by the pump, the pump and parts are damaged and make the life shorten.
(If using the pump for liquid with slurry, consult us in advance.)
3. Cavitation*
If the pump is used with cavitation, it may cause the pump vibration, the basic performance
degradation or damage inside the casing.
The causes may be that suction pipes are long, thin, many bending, high temperature liquid or
strainers clogged.
⚫
Cavitation is the phenomenon that the liquid inside becomes low pressure locally by liquid action
and air bubbles occur.
(When air bubbles break, impact occurs and makes noise & vibration. It also causes the surface
erosion and the performance degradation.)
4. Erosion
The product is mainly made of GFR PP or CFR ETFE. When purchasing it, consider the corrosion
resistance against liquid and select the pump. The pump life may be shortened depending on the
liquid type and temperature. When changing the transferred liquid or condition, consult us.
⚫
CFR PP
Tolerable temperature: 0
– 80
℃
(32
– 176F)
Incompatible liquids: Nitric acid, concentrated sulfuric acid, chromium acid and
strong oxidant such as sodium hypochlorite
⚫
GFR PP
Tolerable temperature: 0
– 70
℃
(32
– 158F)
Incompatible liquids: Nitric acid, concentrated sulfuric acid, chromium acid,
sodium hypochlorite, caustic soda
⚫
CFR ETFE
Tolerable temperature: 0
– 60
℃
(32
゜
– 140F
゜
)
Incompatible liquids: Trichloroethane, Trichloroethylene
