4QGD Stainless Steel Deep Well Submersible Pump

Detail / Structure Image

Key Features

• Stainless Steel Construction: The pump body, motor housing, strainer, and shaft are manufactured from AISI 304 stainless steel, providing corrosion resistance and durability for extended submersion in water .

• Screw Pump Technology: Employs a progressive cavity screw design to generate high pressure with a steady, pulse-free flow rate. This makes it particularly efficient for low-flow, high-head applications .

• 4-Inch Well Compatibility: Engineered to fit standard 4-inch (100mm) and larger well casings, making it versatile for a wide range of domestic and agricultural borehole installations .

• NEMA Standard Motor: Built to NEMA dimension standards, ensuring compatibility with various motor configurations and simplifying integration into existing systems .

• IP68 Protection: The motor offers IP68 ingress protection, allowing for continuous and safe operation when fully submerged .

• Flexible Power Configurations: Available in single-phase (220V-240V) and three-phase (380V-415V) motor options, suitable for both 50Hz and 60Hz power supplies, accommodating different regional electrical grids .

• Integrated Thermal Protection: Single-phase models include a built-in thermal protector to safeguard the motor from overheating, enhancing operational safety and service life .

• Oil-Filled Motor: The motor is filled with oil (often food-grade) to facilitate efficient heat dissipation, ensuring stable motor temperature during operation and protecting the motor windings .

Competitive Advantages

• High-Pressure, Low-Flow Performance: The progressive screw pump design is the primary advantage of the 4QGD series. It efficiently generates high heads (up to 150m) at relatively low flow rates (around 1.2-2.5 m³/h) . This capability makes it directly suited for extracting water from deep domestic and small farm wells, providing a targeted solution where high-volume centrifugal pumps would be inefficient or oversized.

• Superior Material Durability: The use of AISI 304 stainless steel for all major wetted components ensures the pump's corrosion resistance and longevity . This material choice protects the investment and reduces long-term maintenance costs compared to pumps using less resilient materials.

• Steady and Pulse-Free Flow: Unlike reciprocating or other types of pumps, the screw mechanism delivers a consistent, non-pulsating flow. This is beneficial for irrigation systems that require steady pressure and helps reduce wear on downstream valves and pipes .

• System Integration Flexibility: With compliance to NEMA dimension standards and both single-phase and three-phase motor options, the 4QGD series integrates seamlessly into new and existing infrastructure across different regions . Its 4-inch diameter fits a vast majority of standard domestic boreholes.

• Operational Safety: The motor's oil-filled design, combined with IP68 protection and built-in thermal protectors (on single-phase models), provides a robust safeguard against overheating and ensures reliable performance under demanding conditions .

Commercial Value

For B2B buyers, including contractors, system integrators, and agricultural businesses, the 4QGD series offers a focused solution that delivers value through targeted efficiency and reliability. The pump's screw technology ensures it consumes power effectively for high-head, low-flow applications, directly reducing energy costs relative to oversized or less suitable pumping solutions. The durable stainless steel construction translates to a longer service life and lower maintenance costs, providing a solid return on investment.

The product's compliance with international standards (like NEMA, CE, ISO) ensures it meets regulatory requirements for a wide range of international projects, simplifying procurement and installation . Furthermore, the flexibility in motor configurations and voltage options streamlines inventory management for distributors and reduces project delays caused by incompatible equipment. The pump's ability to perform reliably in wells with modest water quality challenges adds to its value proposition, making it a practical and cost-effective choice for various water management needs.

FAQ

Q: What is the minimum well diameter required to install the 4QGD pump?
A: The 4QGD pump is specifically designed to fit standard 4-inch (100mm) well casings. Always confirm your well's inner diameter before installation .

Q: What is the maximum immersion depth for this pump?
A: The maximum immersion depth for the 4QGD series, which features an oil-filled motor, is typically 50 meters .

Q: How does a screw pump differ from a standard centrifugal pump?
A: A screw pump is a positive displacement device that moves a fixed volume of fluid with each rotation, making it very efficient at generating high pressure at low flow rates. It also provides a steady, non-pulsating flow, which can be beneficial for certain irrigation methods .

Q: What is the maximum sand content the pump can handle?
A: The pump is designed for clean water applications and can handle water with a maximum sand content of 0.15% to 0.25% . For applications with higher sand content, a sand-resistant version or additional filtration may be necessary.

Q: What does the "D" in "4QGD" mean?
A: The "D" indicates a single-phase motor model. Three-phase versions of the same model are typically denoted as "4QG" without the "D" .