Drainage pumps Owner of the NDP series are used to pump out clean or contaminated water from flooded buildings, trenches and other reservoirs. The popularity of the brand is growing due to the wide range of proposed modifications and the numerous advantages of design solutions.
The principle of operation and design of drainage pumps Host
The device pumps liquid when partially or completely immersed in it. Water is pumped into the suction holes at the bottom of the housing and exits through the pipe and hose to the drain.
Design features:
- One centrifugal stage powered by electric traction.
- The impeller is mounted on the motor shaft.
- The bearings are self-lubricated and smooth out axial and radial shaft loads and reduce noise.
- Technological shaft and housing seals prevent water from entering the motor.
- The pumped-out liquid cools the motor.
- An alarm relay prevents overheating of the motor.
- The pump is connected to a float switch that automatically controls the motor.
- The kit includes a removable hose fitting.
The electrical cable is hermetically connected to the body of the mechanism. A float switch cuts off power when the water level drops, preventing the unit from idling.
Advantages and disadvantages
Drainage pumps The owner is made from modern materials using new technologies. This ensures long-term and reliable operation of mechanisms and equipment.
Advantages:
- economical energy consumption;
- lack of noise at work;
- ease of maintenance;
- high performance;
- water cooling of the motor does not depend on the immersion depth;
- emergency thermal protection of the electric motor from overheating;
- special arrangements pump out water to a minimum level;
- automatic operation mode, thanks to equipping with a float switch;
- manufacturer's warranty.
Disadvantages:
- use only for household needs;
- no designs with a particle grinder;
- there are no multi-stage modifications.
A wide range of modifications of drainage pumps The owner allows you to choose an option with an optimal set of benefits for each customer.
Model range and technical characteristics
Host pumps are classified according to power consumption, hydraulic performance and intake design.
Drainage pumps NDP 250-5 and NDP 500-5 have low productivity. The maximum size of the pumped solids present in the water is limited to 5 mm.
Models NDP 750-35 and NDP 900-35 pump a large volume of liquid per unit of time at a high level of lift. These modifications are capable of transporting dirty liquid containing solid particles up to 35 mm in size. The NDP 400-35 version has a lower capacity, but is suitable for pumping out dirty water.
Drainage pump The owner of the NDP 400-5A pumps out water to a dry floor. The residual liquid layer is not more than 2 mm. This feature allows this model to be used for dehumidification of premises.
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 parameters of the pressure and flow rate correspond to those declared when using at the outlet of the pipeline with a diameter of at least 40 mm.
Criterias of choice
The degree of pollution and the volume of pumped water are the determining factors for choosing a pump modification. They take into account the features of the relief of the territory in 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 fluid contains particles up to 35 mm thick and requires models marked with 35. An example is a drainage pump NDP 750-35.
The required head depends on the lifting height and the distance to the discharge point. The vertical to horizontal head ratio is 1/10. For example, it is required to pump out water from a 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 higher than the calculated one. Drainage pumps NDP 900-35, NDP 750-35 and NDP 500-5 are suitable.
The capacity shows how much liquid is pumped by the pump per unit of time. If pumping of large volumes is required, high-performance modifications are chosen. Drainage pump Master NDP 900-35 - the most powerful and most efficient in the line.
The capacity depends on the lift height, the length and diameter of the discharge hose. The selection of equipment will be helped by 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 up. The float switch must move freely without interfering with walls and piping. Adjust the length of the float cable to limit the water level at which the motor will shut off.
It is forbidden to suspend the drain pump by the power cable. When pumping out reservoirs with a silted bottom, the body of the device is fixed with a special device.
The operation of the equipment is limited by the working fluid and working conditions.
Pumping water is not allowed:
- nautical;
- with an acidity level above 6 pH;
- heavily polluted - 1.2 times denser than pure water;
- having a temperature above + 35 ° C;
- with fibrous inclusions: grass, ropes, rags;
- with solid particles, the size of which exceeds the permissible 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 out is more than 40 cm.
- It is not allowed to operate the device without water.
- Incomplete immersion of the case in water limits the continuous operation time to 15 minutes.
- The power outlet must be equipped with an earthing device and a residual current device.
Continuous operation of the drain 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 subzero temperatures, the equipment is stored in a warm room.
Compliance with operational requirements will ensure long-term and trouble-free operation of the mechanisms. Competently selected drainage pump The owner in skillful hands will be a reliable assistant at home and on the site.
Drain Pump Reviews The Host
Andrey, Moscow region. A septic tank for liquid waste at the site requires frequent pumping with a volume of 5 m3. Calling specialized vehicles 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 up and did not stop. The float itself turned off the motor when the pump was pumping liquid. I was pleased with the set of characteristics for a modest price. The power of the 750 W electric motor gives out a capacity of 17 m3 / h and a head of up to 8 m. The immersion depth is up to 5 m. No noise - switch it on and forget it.Advantages: able to pump out a large volume of water with low power consumption; high head; works in automatic mode; affordable price: silent.Disadvantages: pumping speed is not sufficient; can not be used for handling waste containing large debris.
Igor, Voronezh. Acquired the most powerful pump model NDP 900-35 for pumping out a catchment well. The device easily handles large volumes of water and quickly pays for itself. The characteristics of the modification correspond to those stated.Advantages: low price, high performance, high pressure; easy to operate, turns off automatically.I did not find any visible shortcomings.
