Nocchi Pratika Submersible Water Pump 1.2kW (111004)

The portable submersible pump PRATIKA is designed for lifting clean water from a large depth (up to 46 m). It is particularly recommended in cases where the water level in the well is less than 8m and it is not possible to use conventional centrifugal pumps and water supply units. The four-stage pump generates relatively high pressure and, when combined with a small pressure tank and pressure switch, can easily be converted into a water supply unit. The pump is also convenient to use if there is already a submersible pump in the house's water supply system and it needs to be replaced with a more modern and safer one.

Materials:

The pump housing, motor housing, outer shell, and suction filter are made of stainless steel AISI 304. The impeller wheels and diffusers are made of a special plastic-technopolymer reinforced with glass fibers. The impeller wheel bushings and rotor shaft are made of stainless steel. The pump is equipped with a special graphite-ceramic seal and a double seal with lubricant. The rotor shaft is mounted with self-lubricating sealed ball bearings that require no maintenance. The rotor shaft is coated with ceramic in the seal areas. The pump is equipped with a float-type gravity switch that automatically shuts it off when the water level is low.

Pump motor cooling:

The pump stator is pressed into a stainless steel housing, which in turn is placed in an enlarged diameter stainless steel outer shell in the pump housing. A hollow space is formed between these two shells, into which the pumped water constantly flows, ensuring direct and continuous motor cooling.

Pump operation:

Water enters the lower part of the pump through the visible sieve and the suction flange hole. As the impeller wheel rotates, each blade imparts energy to the water flow in the form of pressure. The flow velocity from the center to the edges increases significantly. By leaving the lower impeller wheel, the water flow gains very high velocity and is then squeezed onto the middle and then the upper impeller wheel. The water exits the pump with a pressure of 4.6 atmospheres.

Water filtration:

The pump is equipped with a dual water purification system.
1. A cover made of stainless steel sheet with small holes is placed around the pump to trap larger debris.
2. Inside the pump housing, the suction flange is specially designed as an additional self-cleaning filter. The suction flange has small holes through which the water reaches the lower impeller wheel, and the water flow created by this impeller wheel prevents fine impurities from entering the suction flange holes.

Installation:

The pump should be securely hung from the well cover using a rigid chain. It should be positioned at least 80cm above the sediment layer. However, if there is a possibility of dirt entering the pump, it should be placed in addition to a fine metal mesh basket. A check valve must be installed in the discharge pipe to prevent water from being forced back into the well when the pump stops. The pump should be placed so that the float-type gravity switch can move freely in a vertical direction.

Pipe diameter:

The water supply pipe can be made of either plastic or metal, but the metal pipe and the pump should be connected with a half-meter long flexible hose. The recommended diameters for the water supply pipe are Dn32mm or Dn25. Secure the water supply pipe so that it does not exert any pressure on the pump with its weight under any circumstances.