2/2.5SDm Stainless Steel Deep Well Submersible Pump

Product Information

Product Name: 2/2.5SDm Stainless Steel Deep Well Submersible Pump

Series: 2SDm0.7 / 2.5SDm1.5

Well Diameter: 2 in / 2.5 in

Voltage: 150–240V single phase; 380–415V three phase

Power: 0.15–0.37 kW / 0.20–0.50 HP

Capacity Range: 0.12–2.4 m³/h

Maximum Head: Up to 82 m

Outlet: G1/2–G1 in

Model Options: 2SDm0.7/26, 2SDm0.7/32, 2SDm0.7/38; 2.5SDm1.5/10, /12, /17, /24, /31

Applications

• Water supply from wells or reservoirs
• Domestic applications
• Civil and industrial applications
• Garden use and irrigation

Operating Conditions

• Maximum fluid temperature: +40°C
• Maximum sand content: 2%
• Maximum immersion: 80 m
• Minimum well diameter: 2 in or 2.5 in

Motor

• Rewindable motor
• Single phase: 150–240V / 50Hz
• Three phase: 380–415V / 50Hz
• NEMA dimension standards
• Insulation class B
• Protection grade IP68

Model Parameters at 50Hz

Outlet: G½" ~ G¾"

Outlet: G¾" ~ G1"

Product Summary

The 2/2.5SDm Series Stainless Steel Deep Well Submersible Pump is a multistage pump line engineered for water supply from wells and reservoirs, covering domestic, civil, industrial, garden and irrigation duties. The rewindable motor is available in single phase 150–240V/50Hz or three phase 380–415V/50Hz, built to NEMA dimension standards with insulation class B and IP68 protection.

Across the 2SDm0.7 and 2.5SDm1.5 series, output spans 0.12–2.4 m³/h with heads up to 82 m and outlets from G1/2 to G1 in. Minimum well diameter is 2 in or 2.5 in; maximum fluid temperature is +40°C, maximum sand content 2% and maximum immersion depth 80 m.

Detailed Description

The 2/2.5SDm series is designed for narrow-bore installations where standard 3-inch and 4-inch submersible pumps simply cannot fit. With a minimum well diameter of just 2 inches on the 2SDm0.7 series and 2.5 inches on the 2.5SDm1.5 series, this stainless steel deep well submersible pump accesses shallow and deep boreholes that wider pumps cannot service — a decisive advantage in rural water supply, garden irrigation and domestic well applications where small-diameter casings are the norm.

The rewindable motor is a core serviceability feature: instead of replacing the entire pump at end of winding life, the motor can be rewound in the field or at a local workshop, significantly extending total product lifespan and reducing lifecycle cost for the end user. NEMA dimension standards ensure dimensional interchangeability with the broad installed base of NEMA-standard deep well motors, simplifying spare parts logistics for distributors.

Electrical flexibility is built into the range from the start. The single phase variant accepts a wide 150–240V input window, tolerating the voltage fluctuation common in rural and remote grid conditions without derating or nuisance tripping. Combined with Class B insulation, IP68 protection and a maximum immersion depth of 80 meters, the 2/2.5SDm stainless steel submersible pump is specified for continuous submerged duty in borehole water extraction.

The multistage hydraulic design delivers heads up to 82 meters from a pump small enough to pass a 2.5-inch casing, making the series a direct fit for elevated storage tanks, hillside irrigation and multi-story domestic boosting supplied from narrow wells.

Key Product Features

• 2 in / 2.5 in Minimum Well Diameter: Fits narrow boreholes and small-diameter casings where standard submersible pumps cannot be installed
  
  
• Stainless Steel Construction: Corrosion-resistant pump body suited for long-term submerged service in well water conditions
  
  
• Rewindable Motor: Motor windings can be rewound to extend service life — a lower lifecycle cost than sealed disposable motor designs
  
  
• NEMA Dimension Standards: Interchangeable with the widely installed NEMA-standard deep well pump base, simplifying spares and replacements
  
  
• Wide Voltage Window 150–240V: Single phase variant tolerates rural grid voltage fluctuation without performance loss
  
  
• IP68 Protection & Class B Insulation: Rated for permanent deep submersion up to 80 meters in clean water
  
  
• Heads Up to 82 m: Multistage hydraulics covering elevated tank filling, hillside irrigation and domestic boosting from a compact 2/2.5-inch pump body

Engineering Advantages

The 2/2.5SDm series occupies a distinct position in the deep well pump market: it combines sub-3-inch well compatibility with genuine multistage head performance. Where most small-diameter pumps top out below 50 meters of head, the 2.5SDm1.5/31 reaches 82 meters — enough for deep boreholes serving elevated storage or gravity distribution networks. This extends the addressable application range of a narrow-well product family well beyond the garden-and-domestic segment into light agricultural and civil water supply projects.

The rewindable NEMA-standard motor addresses a second practical concern: total cost of ownership. In markets where pump replacement involves pulling equipment from deep wells or narrow casings, a rewindable motor converts a catastrophic winding failure into a routine repair, protecting the pump body and hydraulics investment over multiple service cycles. For distributors, the NEMA dimensional standard also means fewer dedicated spare configurations across the product range.

Primary Applications

The 2/2.5SDm stainless steel deep well submersible pump is suited to narrow-well water supply scenarios:

• Water supply from wells or reservoirs for homes, farms and small communities
  
  
• Domestic pressure boosting and elevated water tank filling
  
  
• Garden irrigation and small-scale agricultural watering
  
  
• Civil and industrial water transfer duties drawing from narrow boreholes

Business Value

For distributors and project procurement buyers, the 2/2.5SDm series fills the narrow-well gap in a stainless steel submersible pump portfolio. The two sub-series cover 2-inch and 2.5-inch well standards with a single product family, spanning 0.15 to 0.55 kW and heads from 26 to 82 meters. Wide-voltage single phase input, rewindable NEMA-standard motors and IP68 submersible protection give the range broad applicability across rural domestic, garden, irrigation and light industrial markets — while the stainless steel construction supports positioning above commodity-tier alternatives in quality-sensitive segments.

FAQ

Q: What is the maximum head the 2/2.5SDm deep well pump can achieve?

The 2.5SDm1.5/31 model delivers a maximum head of 82 meters at 50Hz. Across the full range, maximum heads span 26 meters on the 2.5SDm1.5/10 entry model to 82 meters on the top 2.5SDm1.5/31 model.

Q: What minimum well casing diameter does the 2/2.5SDm series require?

The 2SDm0.7 series requires a minimum well diameter of 2 inches, and the 2.5SDm1.5 series requires 2.5 inches. This makes the series suitable for narrow boreholes and small-diameter casings that standard submersible pumps cannot fit.

Q: What is the maximum installation depth for the 2/2.5SDm submersible pump?

The series is rated for immersion depths up to 80 meters, supported by IP68 protection grade and Class B insulation for permanent submerged duty in clean well water.

Q: What voltage supply does the single phase model require?

The single phase variant operates across a wide 150–240V / 50Hz input window, accommodating the voltage variation typical of rural and remote power grids. A three phase 380–415V / 50Hz variant is available for commercial and industrial supply connections.

Q: Is the 2/2.5SDm pump suitable for sandy well water?

The series tolerates sand content up to 2% by volume. For wells with heavy sand loading, a sand separator or pre-filtration is recommended to protect the multistage hydraulics and extend seal life.