Submerged Operation (IP68)
DHAN LAKSHMI Openwell Submersible Pumps
DHAN LAKSHMI Openwell Submersible Pumps are engineered for continuous submerged operation inside open dug wells, farm ponds, rivers, canals, and large underground residential sumps. Encased in corrosion-proof SS304 stainless steel with 100% pure electrolytic copper winding, they deliver massive discharge flow rates up to 11,040 LPH with zero manual priming hassles.
Openwell Submersible Pumps Range
What is an Openwell Submersible Pump?
- Hermetically sealed IP68 water pump designed to rest fully submerged underwater at the bottom of a well, farm tank, or sump.
- Self-flooded underwater operation that completely eliminates foot-valve maintenance, air-lock, and manual priming troubles.
- Engineered with 100% pure copper winding and stainless steel SS304 casing for high discharge volume and corrosion resistance.
Who needs an Openwell Submersible Pump?
- Farmers and agriculturalists requiring high-volume water discharge for field flood irrigation, open dug wells, and drip systems.
- Rural farm owners and orchards lifting water from farm ponds, rivers, canals, or open ground storage tanks.
- Residential societies, commercial complexes, and institutions with large underground sumps needing silent continuous water transfer.
0.5 HP Openwell Submersible Pump
Karha 50
Power Rating0.5 HP (0.37 kW)
Maximum Head18 m Head
1.0 HP Openwell Submersible Pump
Karha 100
Power Rating1 HP (0.75 kW)
Maximum Head26 m Head
1.5 HP Openwell Submersible Pump
Karha 150
Power Rating1.5 HP (1.2 kW)
Maximum Head30 m Head
1.5 HP High-Head Openwell Submersible Pump
Karha 151
Power Rating1.5 HP (1.2 kW)
Maximum Head38 m Head
0.5 HP Openwell Submersible Pump
Karha 50
Power Rating0.5 HP (0.37 kW)
Maximum Head18 m Head
1.0 HP Openwell Submersible Pump
Karha 100
Power Rating1 HP (0.75 kW)
Maximum Head26 m Head
1.5 HP Openwell Submersible Pump
Karha 150
Power Rating1.5 HP (1.2 kW)
Maximum Head30 m Head
1.5 HP High-Head Openwell Submersible Pump
Karha 151
Power Rating1.5 HP (1.2 kW)
Maximum Head38 m Head
Openwell Submersible Specifications & Comparison
Compare head, discharge flow, motor power, and outlet diameters across our Karha openwell series to select the optimal model for your well depth or farm acreage. Click on any model name to inspect full specifications, materials, and performance curves.
| Model | Type | HP | Head Range | Discharge Flow | Suction Depth | Pipe Size | Recommended Application |
|---|---|---|---|---|---|---|---|
| Karha 50 | Openwell Submersible (V5) | 0.5 HP | 4 - 18 m | Up to 6,197 LPH | 0 m (Submerged) | 25 mm (1") | Open wells, residential sumps, micro-irrigation, domestic tanks |
| Karha 100 | Openwell Submersible (V6) | 1.0 HP | 8 - 26 m | Up to 8,875 LPH | 0 m (Submerged) | 25 mm (1") | Agricultural open wells, farm tanks, drip irrigation, overhead transfer |
| Karha 150 | Openwell Submersible (V6) | 1.5 HP | 10 - 30 m | Up to 9,940 LPH | 0 m (Submerged) | 38 mm (1.5") | Heavy farm irrigation, multi-acre crop watering, river water lifting |
| Karha 151 | Openwell Submersible (V7) | 1.5 HP | 10 - 38 m | Up to 11,040 LPH | 0 m (Submerged) | 38 mm (1.5") | Deep open wells, high head canal lifting, commercial agriculture |
How to Choose the Right Openwell Submersible Pump
Selecting an openwell pump depends on your well depth, vertical lift distance to fields/tanks, delivery pipe diameter, and power supply stability:
Total Head & Well Depth
- Calculate the vertical depth from pump installation level to the highest point of water discharge.
- For heads up to 18m, Karha 50 (0.5 HP) or Karha 100 (1.0 HP) is ideal.
- For deeper wells and higher lift reaching up to 38m, choose Karha 151 V7 (1.5 HP).
Discharge Volume (LPH)
- Flood irrigation and multi-acre agricultural fields require 8,000 to 11,000+ LPH (Karha 150 & 151).
- Drip lines, sprinkler zones, and domestic sumps operate efficiently on 4,000 to 6,000 LPH (Karha 50 & 100).
Rural Voltage Band (180V–240V)
- All DHAN LAKSHMI openwell pumps are wound with high-grade poly-wrapped copper wire designed to operate safely down to 180V during rural drops.
- Ensures uninterrupted farm watering during peak irrigation cycles.
Submerged Installation & Foundation
- Install resting horizontally or vertically on a solid masonry bed or suspended 1–2 feet above the well bottom to avoid drawing silt.
- Water-lubricated carbon thrust bearings require complete water immersion before starting.
Pipe Diameter & Flow Friction
- Karha 50 and 100 use 25mm (1") outlets; Karha 150 and 151 use 38mm (1.5") outlets for minimum frictional head loss.
- Use heavy-duty HDPE or GI column piping with secure support clamps.
Need help calculating head or selecting an openwell pump?
Our application engineers in Pune can calculate your exact total head and recommend the right HP pump for your site.
Frequently Asked Questions — Openwell Submersible Pumps
Technical, operational, and maintenance guidelines specific to DHAN LAKSHMI Openwell Submersible Pumps range.
No. Because the pump rests fully submerged underwater (IP68 rating), it is naturally self-flooded. There is zero risk of air locking, eliminating foot valve clogging, leakage, and manual priming entirely.