Teral VFZ Series, Инструкция по эксплуатации

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11. The Vacuum Pump will be continuously at within the operation range shown on the wind flow rate
to static pressure curve (shown in the catalog). This operation range is so wide that the machine
can be operated at nearly closed pressure but, if you operate it at high pressure, especially take
care not to exceed the operation range. If you must operate it at closed condition, arrange a
bypass hole on the way, so that a more wind than required range flows through the blower even if
the suction port is closes (Figure 4).
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12. For using air intermittently, the switching by means of a valve is recommended rather than the
switching on and off of the motor (Figure 5). The standard for start and stop frequency of Vacuum
Pump shall be not higher than the values in table below.
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Tolerable start/stop frequency for Vacuum Pump 䌛 Sw/Hr 䌝
Model Value for frequency of 50/60Hz
VFZ101 – VFZ301 30/20
VFZ401 – VFZ601 20/15
VFZ701 – VFZ901 15/10
*1 switch
䋺
one cycle of ON and OFF
13. The characteristics differ a little when the machine is used at suction side and when used at
discharge side, as shown in the characteristics curve. As the air specific weight becomes larger,
when the discharge side is throttled, the static pressure becomes also larger.
14. Remove any solid object, dust, thread chip, water drop or the like before entering into the Vacuum
Pump. Even if make no dust be sucked directly, take measures not to suck any dust staying
around by mistake. Use of the dust staying around by mistake. Use of the dust collection sack in a
vacuum cleaner or the like is recommended.
Also, it is recommended to use a filter having considerably large space. Remove sometimes the
dust collected in the filter. It may also be possible to make the dust blow off by reversing the
Vacuum Pump, if it is possible.
15. If dusts adhered inside and outside of the blower (especially in the cooling air path for cooling fan
cover), remove them. If adhered dusts increase, it causes such troubles as a temperature rise, a
sink of wind flow rate and an increase vibration.
16. As the motor load (current) changes depending upon the air flow used by the Vacuum Pump, refer
to the characteristics curve for setting the wiring capacity and protection relay.
䋨࿑䋭䋴䋩
䋨 Figure 5 䋩
㪝㫆㫉㩷㫌㫊㫀㫅㪾㩷㪭㪝㪱㪋㪇㪈㪘㪄㪭㪝㪱㪍㪇㪈㪘㩷㫎㫀㫋㪿㩷㫋㪿㪼㩷㪻㫀㫊㪺㪿㪸㫉㪾㪼㩷㫊㫀㪻㪼㩷㪺㫃㫆㫊㪼㪻
Bypass hole
Valve
Piping
Valve
Release
Switch suction and blow using the valve.
(Suction)
(Blow)
Product
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Load
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Suction
Blow
䋨 Figure 4 䋩
Valve