5NK STAINLESS STEEL DEEP WELL PUMP

Component

Pump Body: Stainless steel

Impeller: PPO

Motor Shaft: Stainless Steel

Mechanical Seal: Ceramic/Graphite

Build-in thermal protector

15m cable with Plug

Operating Condition

Liquid Temperature up to 40°C

Min. Applicable well diameter: 5"

15m maximum immersion depth

Solid Impurities in medium: ≤0.1% (volume ratio), Particle Diameter ≤0.2mm

Medium PH: 6.5~8.5

Motor

1~220V/50Hz, 110V/60Hz, 220V/60Hz on request

Insulation Grade: Class B

Protection: IPX8

Continuous Work S1

Model Parameters 50Hz

Model Parameters 60Hz

Product Summary

The 5NKm Series Stainless Steel Submersible Deep Well Pump is a centrifugal pump line engineered for clean water extraction from deep wells and boreholes. With a stainless steel pump body, PPO impeller, and stainless steel motor shaft, the 5NKm deep well pump delivers corrosion-resistant performance across 50Hz and 60Hz electrical systems. Four 50Hz models cover head ranges from 33 to 85 meters, while six 60Hz models extend the range to 125 meters. The built-in thermal protector, IPX8 motor protection, and S1 continuous duty rating make this stainless steel submersible pump a dependable choice for residential, agricultural, and light commercial water supply projects worldwide.

Detailed Description 

The 5NKm Series stands out in the deep well submersible pump category through its material specification choices. A stainless steel pump body replaces the painted cast iron or coated carbon steel found in lower-cost alternatives, providing resistance to surface degradation in continuously submerged service conditions. This matters particularly in borehole installations where the pump operates below the water table for months or years at a time, and where retrieval for inspection requires significant effort. The Ceramic/Graphite mechanical seal handles the shaft interface reliably under prolonged submersion, and the included 15-meter cable and plug simplify the installation process on most standard-depth well sites.

The motor carries Class B insulation and full IPX8 protection, certified for permanent submersion in clean water. Combined with S1 continuous duty classification, the 5NKm stainless steel deep well pump is designed to run for extended periods without thermal shutdown — a requirement for irrigation systems, fire-fighting booster sets, and building water supply loops that depend on consistent pump availability throughout the operating day. Motor cooling in submerged operation is passive: the surrounding water absorbs generated heat, removing the need for external cooling circuits.

Key Product Features

• Stainless Steel Pump Body: Corrosion-resistant construction suited for long-term deep well and borehole service in clean water conditions
  
  
• PPO Impeller & SS Motor Shaft: Engineered for hydraulic stability in the rated flow range with minimal shaft corrosion over service life
  
  
• IPX8 Motor Protection: Rated for continuous deep submersion in clean water — no external sealing required at the installation site
  
  
• Built-in Thermal Protector: Responds automatically to motor temperature in edge-case conditions such as restricted flow or reduced submersion depth
• S1 Continuous Duty: Designed for uninterrupted operation throughout extended daily run cycles in irrigation and water supply applications
• 50Hz & 60Hz Model Variants: A single product family serving both major global power standards, from a 33m head entry model up to a 125m head top model
• 5-Inch Minimum Well Diameter: Compatible with the large majority of standard residential and commercial borehole configurations worldwide

Engineering Advantages

The 60Hz model range in the 5NKm series achieves notably higher head outputs than the 50Hz equivalents due to the higher rotational speed of the two-pole motor. The 5NKm3/8 on 60Hz reaches 125 meters maximum head compared to 85 meters on the 50Hz version of the same model. For 60Hz market applications — including tall building water supply and high-head agricultural irrigation — this head range covers most standard specification requirements from a single stainless steel submersible pump series, reducing the need to source separate product families for different project scales.

The stainless steel construction approach also addresses a practical procurement concern for distributors: buyers in quality-sensitive markets respond well to visible material quality at the pump body level rather than surface coatings they cannot easily assess. The stainless steel deep well pump body communicates build quality at a glance, supporting wholesale pricing discussions and positioning the 5NKm series above commodity-tier alternatives in competitive markets. The consistent 5-inch well diameter compatibility across the entire model range further simplifies the specification and sales process for dealers working across varied site conditions.

Primary Applications

The 5NKm stainless steel deep well pump is suited to a wide range of clean water supply scenarios:

• Deep well and borehole water extraction for rural, agricultural, and residential supply
  
  
• Building water pressurization and supply in residential and commercial properties
  
  
• Agricultural drip, sprinkler, and flood irrigation drawing from deep borehole water sources
  
  
• Fire-fighting booster set supply requiring dependable pressure under high-demand cycles
  
  
• Water tower and cistern filling operations in municipal and industrial infrastructure

Business Value

For distributors and project procurement buyers, the 5NKm Series offers a commercially structured range covering both 50Hz and 60Hz market requirements within a single stainless steel submersible pump family. Four 50Hz models span 33 to 85 meters of head and six 60Hz models extend to 125 meters, meaning buyers can address the majority of residential, agricultural, and light commercial deep well pump specifications without sourcing across multiple product lines. The stainless steel pump body supports positioning in higher-margin market segments where installation longevity is a key buying criterion. Consistent compatibility with standard 5-inch borehole casings across the full model range simplifies contractor specification and reduces the complexity of field inventory management.

FAQ

Q: What is the maximum head the 5NKm deep well pump can achieve?

The 5NKm3/8 model on 60Hz delivers a maximum head of 125 meters. On 50Hz, the same model reaches 85 meters. Across the full range, 50Hz variants cover 33 to 85 meters and 60Hz variants cover 47 to 125 meters of maximum head.

Q: What minimum well casing diameter does the 5NKm series require?

A minimum well diameter of 5 inches is required across all models in the series. This aligns with the majority of standard residential and commercial borehole configurations, making the 5NKm stainless steel submersible pump a straightforward fit for most installation sites without structural modification.

Q: Is the 5NKm submersible pump suitable for water with high solid content?

No. The 5NKm series is rated for clean water with sand content not exceeding 150g/m³ and particle diameter below 0.2mm. Using this pump with high-turbidity water or abrasive solids will accelerate wear on the mechanical seal and impeller. Slurry or dirty water pump products are the appropriate choice for those applications.

Q: What is the maximum installation depth for the 5NKm stainless steel deep well pump?

The 5NKm series is rated for up to 15 meters of maximum immersion depth. For borehole installations requiring deeper submersion, a pump series rated for greater immersion depth would be the appropriate product choice. The included 15-meter cable handles the standard installation depth requirement in most common deployment scenarios.