The quality of the water from the public water supply is low. Owners of private houses and cottages refuse centralized water supply in favor of wells, which are made directly on the site. In such a situation, it is convenient to use pumps and pumps to supply water. One option is a pump for the Kama well.
The principle of operation and device
Main nodes:
- housing;
- engine;
- cable-stayed impeller;
- impeller housing;
- starting protection device (ROM);
- power cord.
The remaining, smaller parts are intended for communication of working units, their lubrication, sealing and protection against ingress of foreign objects. A downhole pump is a pipe in which a motor connected to an impeller is hermetically mounted.
The voltage is supplied through a wire connected to a 220 volt network via ROM. While rotating, the rotor of the motor drives a screw impeller, which is connected to it by means of an adapter clutch. Water in the impeller housing is squeezed out through the outlet under the action of the blades, a new portion enters the housing. The process continues until the pump is completely submerged in the well and there is fluid around it.
As soon as the water is over, the rotor speed will increase, because the impeller will rotate without resistance, as a result, overheating will occur and the engine may burn out. Water is also used in the pump for cooling.
The number of impellers in a water cannon is directly related to engine performance and power. The more of them, the greater the volume of liquid the pump is able to pump at a lower rotor speed.
Lineup and Specifications
When choosing a pump, you need to know the technical characteristics by which its performance is evaluated. The main indicator is the depth with which the pump can supply water to the surface, the second is the amount of pumped liquid per minute, the third is the distance over which pressure is provided. The fourth indicator is the power consumption of the engine. In the designation of a specific model, almost all of the above characteristics are indicated, so you can determine the technical parameters even without documents. The label is affixed to the body. An example of a designation is KAMA NPS-1.1-1.7 / 100:
- NPS - submersible borehole pump;
- 1,1 - power consumption kW;
- 1.7 - amount of pumped liquid m³ / h;
- 100 - lifting height.
In addition to the main characteristics, in the documents you can find information about the diameter, depth of immersion in water.
A separate view is multistage borehole pumps, in which not one impeller, but several. In the designation of such models, after the letters is a number that indicates their number.
The table shows several models of Kama well pumps. They differ slightly in the volume of pumped liquid, but significantly in pressure.
| Model | Current consumption, A | Power, W | Productivity, m3 / h | Head, m |
| 95NSP6-0.4-2 / 30 (U) | 2,7 | 0,36 | 0,6 | 30 |
| 95NSP8-0.55-2 / 40 | 3,42 | 0,48 | 0,5 | 40 |
| 95NSP10-0.75-2 / 50 (U) | 4,26 | 0,57 | 0,5 | 50 |
| 95NSP14-1,1-2 / 70 (U) | 5,61 | 0,8 | 0,5 | 70 |
Criterias of choice
To select a pump for a specific site or house, you must first determine its characteristics. This requires:
- measure the depth of the well to the water level;
- determine the distance at which the feed is planned;
- calculate the planned consumption.
It is worth considering the degree of contamination of the well, because water cannons have a limited capacity for the size of particles in the pumped medium. You should also know the diameter of the casing installed in the well, becausethe pump should be a little smaller.
Features of installation and operation
You can install a pump that you plan to use only for watering yourself. It is necessary to connect the hose, prepare and secure in advance a metal cable with a diameter of at least 4 mm, on which the pump will hang. Hanging on an electric cord is strictly prohibited. The cable length should be a couple of meters longer than the distance to the water level in the well. After the hose is connected and the water cannon is clamped by a cable, it can be lowered into the well and immersed in water to the depth specified in the documents.
It is difficult to assemble an automatic water supply system based on a water jet without skills. Correctly connect the automation, expansion tank, adjust the working pressure, only a specialist can. A quality installation is the key to working for a long time.
Some sellers give a guarantee only if the installation was carried out by a specialist who has a certificate from the manufacturer's company, which gives the right to install well pumps.
During operation, it is necessary to annually get a water cannon out of the well, carry out cleaning and maintenance. This will significantly extend the service life.
Advantages and disadvantages
The advantage of the Kama borehole submersible centrifugal pump is its high performance and the ability to lift water from a depth of up to 100 meters. Conventional centrifugal devices that are mounted on the surface cannot fence from this distance.
The disadvantages include fragility, stringent requirements for water quality. Kama water cannons belong to the budget category, but some models cost more than 10 thousand.
