Drainage pumps The owner of the NDP series is used to pump clean or contaminated water from flooded buildings, trenches and other tanks. The popularity of the brand is growing due to the wide range of proposed modifications and the numerous advantages of design solutions.
Principle of operation and arrangement of drainage pumps
The device pumps liquid when partially or completely immersed in it. Water is pumped into the suction openings in the lower part of the housing and exits through the pipe and hose to the drainage site.
Design features:
- One centrifugal stage, powered by electric traction.
- The impeller is mounted on the motor shaft.
- The bearings contain self-contained lubrication and smooth the end and radial loads on the shaft, as well as reduce noise.
- Technological shaft and housing seals prevent water from entering the electric motor.
- The pumped liquid cools the motor.
- An alarm relay prevents the motor from overheating.
- The pump is connected to a float switch that controls the motor automatically.
- The kit includes a removable hose fitting.
The electric cable is hermetically connected to the mechanism body. The float switch cuts off the power when the water level drops, preventing the unit from idling.
Advantages and disadvantages
Drain pumps The owner is made of modern materials using new technologies. This ensures a long and reliable operation of mechanisms and equipment.
Advantages:
- economical energy consumption;
- lack of noise in work;
- ease of maintenance;
- high performance;
- cooling the motor with water does not depend on the depth of immersion;
- emergency thermal motor protection against overheating;
- special layouts pump water to a minimum level;
- automatic operation due to the equipment with a float switch;
- manufacturer's warranty.
Disadvantages:
- use only for domestic needs;
- no designs with a grinder of solid particles;
- There are no multi-stage modifications.
A wide range of modifications of the drainage pumps Owner allows you to choose the option with the optimal set of benefits for each customer.
Lineup and Specifications
Host pumps are classified by power consumption, hydraulic characteristics, and water intake design.
Pumps drainage NDP 250-5 and NDP 500-5 have low productivity. The maximum size of pumped solids present in water is limited to 5 mm.
Models NDP 750-35 and NDP 900-35 pump a large volume of fluid per unit of time at a high level of lift. These modifications are capable of transporting a dirty liquid containing solid particles up to 35 mm in size. Variant NDP 400-35 has lower productivity, but is suitable for pumping dirty water.
Drainage pump The owner of the NDP 400-5A pumps water to a dry floor. The residual layer of liquid is not more than 2 mm. This feature allows you to use this model to drain the premises.
Technical Specifications Table:
| Model | Power, W) | Max. head (m) | Max. flow rate (m / h) | Weight, kg) |
| NDP 250-5 | 250 | 5 | 6 | 3,8 |
| NDP 500-5 | 500 | 8 | 12 | 4,7 |
| NDP 400-35 | 400 | 5 | 9 | 4 |
| NDP 750-35 | 750 | 8 | 17 | 5 |
| NDP 900-35 | 900 | 9 | 17 | 5,2 |
The pressure and flow parameters correspond to those declared when using a pipeline with a diameter of at least 40 mm
Criterias of choice
The degree of contamination and the volume of pumped water are the determining factors for choosing a pump modification. Take into account the features of the relief of the territory on which it is necessary to pump out the liquid.
For pumping relatively clean water containing particles up to 5 mm in size, modifications with the number 5 at the end of the designation are used. For example - NDP 250-5.
Contaminated liquid contains particles up to 35 mm thick and requires the use of models with the number 35 in the marking. An example is a drainage pump NDP 750-35.
The required head depends on the height of the lift and the distance to the discharge point. The ratio of vertical and horizontal pressure is 1/10. For example, you want to pump out water from the basement with a depth of 4 m, move it along the hose by 10 m, and then raise it by another 1 m. The total head will be at least 6 m. You should choose a design with a maximum head above the calculated one. Drainage pumps NDP 900-35, NDP 750-35 and NDP 500-5 are suitable.
Performance shows how much fluid the pump pumps per unit of time. If pumping of large volumes is required, high-performance modifications are chosen. Drain pump The owner of the NDP 900-35 is the most powerful and most productive in the line.
Productivity depends on the lifting height, length and diameter of the discharge hose. The selection of equipment will help to carry out specialists or specialized software.
Features of installation and operation
For operation, the pump is immersed in water and placed on the bottom of the tank or suspended at some distance from the bottom if it is silted. The float switch must move freely without clinging to the walls and piping. Adjust the length of the float cable to limit the water level at which the motor will shut off.
Suspension of the drain pump by the wire is prohibited. When pumping out tanks with a silted bottom, the device casing is fixed with a special device.
Operation of the equipment has limitations on the working fluid and working conditions.
Pumping is not allowed:
- nautical;
- with an acidity level above 6 pH;
- heavily contaminated - 1.2 times denser than pure water;
- having a temperature above + 35 ° C;
- with fibrous inclusions: grass, ropes, rags;
- with solid particles that are larger than the allowed size.
Operation and safety requirements:
- The maximum immersion depth of the mechanism under water is 5 m.
- The diameter of the tank from which the liquid is pumped more than 40 cm
- Operation of the device without water is not allowed.
- Incomplete immersion of the case in water limits the time of continuous operation to 15 minutes.
- The power outlet must be equipped with ground and a residual current device.
Non-stop operation of the drainage pump is not allowed. For every 1.5 hours of work, a break of 10-15 minutes is allocated.
Before a long break in operation, the device is cleaned by pumping clean water. At sub-zero temperatures, the equipment is stored in a warm room.
Compliance with operational requirements will ensure long and uninterrupted operation of mechanisms. Properly selected drainage pump The owner in the right hands will be a reliable assistant at home and on the site.
Reviews about the drain pump
Andrey, Moscow Region. Septic tank for liquid waste on the site requires frequent pumping with a volume of 5 m3. Calling specialized machines is expensive and troublesome. I decided to purchase a drainage pump. The owner of the NDP 750-35. The first application made a favorable impression. The unit confidently coped with the task, did not clog and did not stop. The float itself turned off the motor when the pump pumped the liquid. Pleased with a set of features for a modest price. The electric motor power of 750 W gives out productivity - 17 m3 / h and a pressure - up to 8 m. Depth of immersion - up to 5 m. No noise - turned on and forgot.Advantages: able to pump out a large amount of water with low energy consumption; high head; works in automatic mode; reasonable price: silent.Disadvantages: pumping speed is not sufficient; cannot be used for handling waste containing large debris.
Igor, Voronezh. I got the most powerful NDP 900-35 pump model for pumping a drainage well. The device easily copes with large volumes of water and quickly pays for itself. Modification specifications are consistent with the declared.Advantages: low price, high performance, high pressure; easy to operate, turns off automatically.I did not find any visible flaws.
