7
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Minimum liquid level during operation
/ Example of installation / Model description
Minimum liquid level during continuous operation is 400 mm.
Keep the liquid depth during operation that the whole pump is submerged.
Operation under the liquid level of the continuous operation for dead head operation is within 5 minutes.
Do not short operation repeatedly.
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The thermal protector may work to protect the motor according to conditions in the operation and
the pump may stop. In this case, stop the operation for a while. Ensure the liquid level is properly
and start the operation after checking whether the pump is normal.
Minimum liquid level during operation is 130 mm.
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Even if the operational liquid level is correct, the operation error may occur to the air entering by the
condition of the liquid level.
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If the impeller is operated in the air, the rotating parts may be damaged.
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Example of installation
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Model description
YD
– 50 02 GWN1 – CP – A D 6 2 – HP - V
(1) (2) (3) (4) (5) (6) (7) (8) (9)
(1) Bore:
50 = 50A
(2) Motor output:
02 = 1.1kW = 1.5HP
(3) Cover main material: CFR PP
(4) Bearing material:
R = PTFE
A = Alumina Ceramic
(5) O-ring material:
E = EPDM
D = FPM
(6) Frequency:
5 = 50Hz
6 = 60Hz
(7) Specific gravity:
1 = 1.1
3 = 1.3
5 = 1.5
(8) Impeller:
No mark = Standard type
HP = High pressure type
(9) Special mark:
(Ex.) V = Non-standard voltage
Z = With PVC tube
* When the special mark is suffixed, it means the special material required by customer or special
specification with some modification.
Pressure gauge
Sluice valve
Check valve
Air release pipe
(Open slightly)
Min. liquid level
during continuous
operation
Operational min.
liquid level
