Frequently Asked Questions Everything you need to know
Pump efficiency is defined as the ratio of the power imparted on the fluid by the pump in relation to the power supplied to drive the pump. It is the ratio of hydraulic power to shaft power.
When a motor / pump is operated in under voltage condition, the motor will consume more current which results in increase of winding temperature and may lead to motor burnout.
When over voltage condition occurs the insulation of winding may fail causing short circuit leading to motor burnout.
A submersible pump pushes water to the surface by converting rotary energy into kinetic energy and kinetic energy into pressure energy. This is done by the water being pulled into the pump. First in the intake, where the rotation of the impeller pushes the water through the diffuser. From there, it goes to the surface.
Submersible motor is an electric motor which can operate while being submerged in water. This sealed motor is typically used with pumps. It converts electrical energy into mechanical energy (shaft power).
Absolutely. The water pump shaft and impeller are spinning at extremely fast rates. With no water to transfer their rotational energy to, that energy is released as heat instead. If the pump is run dry, its moving parts will become extremely hot, causing severe damage to the pump over time and greatly limiting its service life.
While most water pumps are fairly quiet during operation, hydraulic drive motors can be quite noisy. Ensure that the noise you hear is in fact coming from the water pump. If the pump is making a growling, grinding, squealing, or popping noise, it should be immediately disassembled and inspected for damage.
Submersible Motor Fails Because Of The Following Reasons:
Pumping Hot water, Frequent motor on & off.
Insulation of Winding is damaged.
Water Hammer or hydraulic shock loading.
If motor seal is damage, then sludge enters the motor and damage it.
Motor fail because of under voltage or over voltage.
A very serious problem for all induction motors failure are voltage spikes.
Water impurities increases, mechanical damage and Locked impeller or dragging, causing overload.
Quick Answers
- A submersible pump is a pump that is designed to be immersed in fluid. The motor on a submersible pump is attached directly to the pump body, allowing the whole assembly to be submerged.
- A submersible pump has a system of mechanical seals that prevent fluid from getting into the motor, resulting in short circuits.
- A submersible pump typically has the shape of a cylinder. The sealed motor of a submersible pump makes up the lower half which is connected to an above ground power source, controlled by wires. The upper half is the actual pump which is comprised of a series of impellers, each separated by a diffuser, that force fluid up a hose or pipe.
- A submersible pump may fail for the following reasons: Tank size is too small, Short cycling, Running dry, Lightning strikes, Improper selection of high head pumps in low head applications.
- A submersible pump is used in many applications. A single stage submersible pump is used for sewage pumping, slurry pumping, drainage, and general industrial pumping. A multiple stage submersible pump is lowered down a borehole and used for water extraction or in water wells.
- A submersible pump has the reputation of being exceptionally reliable. The technology of submersibles is well developed, resulting in few problems and difficulties. It is not uncommon for a submersible pump to function well for 25 years before requiring service.
- A submersible pump is best serviced by a professional, in that the whole unit must be extracted from beneath the ground for inspection.