RAINFOS SUBMERSIBLE PUMP

A submersible pump is one which is submerged in water or any other fluid medium. These pumps have an electric motor as the prime mover. The water or fluid moves from the bore well or a submerged tank through a series of stages, a stage comprising an impeller and diffuser/bowl, and is pumped out at the ground level or as per the application need. The impeller which is mounted on the shaft spins due to the mechanical energy provided by the prime mover. As water gets sucked into the impeller through the eye, it gains kinetic energy from the impeller vanes. The water exits the impeller vanes and enters into the diffuser/bowl, where the kinetic energy is converted to pressure (head). The water then moves on to the next impeller and Head (Pressure) of water increases at each stage as described above, until it reaches the delivery casing. At the delivery casing the water reaches the end application with the necessary accessories. The submersible pumps can be classified as radial flow, transition flow or mixed flow based on the specific speed of the pump. In general, the mixed flow is meant for higher discharge, whereas radial flow pump operates at higher head with lower discharge.

Submersible pumps are safe to be used in water or fluid medium as the electric motor is sealed. The electric cables are generally connected at the ground or surface level wherein the leads are terminated to a control panel/starter. At the bottom of the bore well or a tank, any wire / lead connection is sealed inside the motor and the chances of electric failures are highly improbable. Considering that the user has chosen the right pump size (outer diameter) that matches the bore well diameter and the application, the pump can be easily installed without any safety issues. The motor and pump are also held together by a robust mechanical design and the chance of separation is unlikely.

For clear water applications, the submersible pumps can be used for either bore well or open-well applications Bore well submersibles are used to pump water starting from 50 feet below the ground. At present, these pumps are being used for depths upto 1500 feet below the ground. However, as the ground water levels are rapidly decreasing, there are efforts to design the submersible pumps for higher depths. The size of the bore well can be 3”, 4”,5”,6”,7”, 8”. Submersible pumps are typically used for residential apartments, commercial complexes, and municipal and industrial water circulation, irrigation systems Submersible dewatering and cutter pumps are used for sewage treatment plants, water well and deep well drilling, mine dewatering.

There are a variety of factors that could cause your submersible pump to run continuously. But regardless of the reason, a submersible pump that runs without stop will burn out more quickly than a submersible pump that runs intermittently.

The best quality submersible pumps are designed to suit the application, energy efficient, use high grade of materials for reliability and long life and have an optimum price. The manufacturers of these pumps have accessible service network and good after sales support with warranty.

Submersible pumps are to be used according to specifications provided by the manufacturer. The pump should be installed at the recommended depth with the necessary accessories as mentioned in the user manual and/or name plate. Once the pump is installed as per the instructions, the pump can be operated by the starter panel based on the availability of water in the bore well. Ensure that there is a dry run protector connected to the pump so as to avoid any damage to the pump.