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 Detail Information Submersible |
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The cable inlet allows no moisture to penetrate into the interior of the motor. The cable is sealed with epoxy resin, the wires are fed into separate guides, which also form the connection to the motor, and, in this way, even the interior space between the cable sheathing and the wires is completely sealed off.
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Separate cable covers permit the simple insertion of a new cable.
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Temperature sensor in the upper bearing (optional).
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Temperature sensor built into the winding.
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High-efficiency motor with dry stator winding, insulated to Class F.
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Re-lubrication facility for the axial bearing.
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Temperature sensor in the lower bearing (optional).
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Float switch for warning of leakage from the upper seal (optional).
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Moisture sensor in oilchamber gives warning of water penetration.
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Tandem mechanical seal in large oil chamber.
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Sealplate part with cooling ribs serves as a heat exchanger to the transported medium. | | | | | Moisture Probe
Monitors the condition of the pump side seal by detecting water ingress in the cooling/seal chamber oil. An alarm is triggered when a significant amount of water has entered, indicating that the pump side seal should be replaced.
Bearing Temperatures
Most Hidrostal motors have an option of monitoring bearing temperature and on large motors thrust bearing temperature sensors are provided as standard. | | | | | Explosion protection
The motors are approved for use in applications where there is a danger of explosion, according to EExd II B, T3 or T4. Many models are also approved for operation with frequency converters.
Tandem Mechanical Seal
Both seals run in an oil bath, which lubricates the pump side seal faces in the event of dry running. The pump side seal has faces of tungston carbide running against silicon carbide, effective for abrasive applications. For heavy-duty application the pumpside seal springs are totally enclosed in a rubber boot or metal body depending on application. Motor side seals are of the open spring type with carbon/ceramic faces.
| | | | | Float switch (optional)
Detects any water or oil passing through the motor side seal which could cause failure of the lower bearing. This feature is standard on larger motors and an option on smaller versions.
Regreasing of Bearings
The lower bearing carries the axial thrust, the weight of the rotating unit and substantial radial loads. To fulfil its L10 design life, periodic regreasing is necessary on certain models. This is easily done by removing a watertight cover which exposes a greasing nipple. The upper bearing carries a lighter load and does not require regreasing between major overhauls.
| | | | | Submersible depths
All submersible pumps are approved for depths up to 20 m. HIDROSTAL special models can be used for depths up to 200 m.
Two Speed Motors
Dual wound, two speed, submersible motors are available to suit individual applications. | | |  | |
Axial and tubular pumps
Hidrostal A type pumps are designed for flows from 30 to 1, 100l.s. and for low head applications up to 10m. The axial pump range is based around Hidrostals standard range of submersible motors having the same benefits as previously described.
The difference is that the volute on the low pressure versions is replaced with a casing having an axial discharge enabling the pump to be installed in a tube or concrete chamber.
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