HighEfficiency 250QJR Deep Well Submersible Pump China Factory Suppliers

Looking for reliable deep well submersible pumps? As leading China factory suppliers, we offer the 250QJR series and undertake OEM processing to design non-standard motors and pumps according to user requirements, adhering to GB/T2816-2014 and GB/T2818-2014 standards. Contact us via WhatsApp 17855846335.

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Details

Detailed Parameters

Power Supply	Three-phase AC 380V (±5%), 50HZ (±1%)	Max Diving Depth	Up to 70 meters
Water Temperature	Max 20°C (Standard) / High Temp Compatible	PH Value Range	6.5 - 8.5
Solid Impurities	Mass ratio ≤ 0.01%	Chloride Ion Content	≤ 400mg/L
Hydrogen Sulfide	≤ 1.5mg/L	Motor Structure	Closed or water-filled wet structure
Installation Mode	Strictly Vertical Use	Material (Shaft)	3CR13 Stainless Steel

Key Advantages

Anti-Corrosion Build

Utilizes 3CR13 stainless steel for the impeller shaft to ensure maximum durability against wear and corrosion.

Thermal Efficiency

High-grade silicon steel and specialized windings minimize heat buildup and energy loss during operation.

Smart Control

Frequency converter compatibility allows for automatic flow adjustment based on actual water demand.

Sand Prevention

Equipped with dual oil seals and a specialized sand ring to prevent well debris from entering the motor.

Water Lubrication

Water-filled wet structure provides natural cooling and lubrication for the motor and pump bearings.

CAD Precision

Designed using computer CAD to ensure a simple structure with optimized technical hydraulic performance.

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Application Scenarios

Ideal for deep well intake, high-rise buildings, mountain water supply, and agricultural irrigation.

Motor Protection

Full support for short-circuit, overload, phase loss, and undervoltage protection devices.

Installation Safety

Strict guidelines for grounding and insulation testing (≥100MΩ) to ensure operator safety.

Maintenance Cycle

Recommended annual inspection or maintenance after two years of diving time to replace worn parts.

Storage Care

Temperature-controlled storage (

Component Care

Focus on impeller, shaft sleeves, and sealing rings for optimal life-cycle management.

Investment Return Comparison

Feature	Standard Pumps	250QJR Series
Material Quality	Carbon Steel	3CR13 Stainless Steel
Energy Efficiency	Standard Stator	50W400 Silicon Steel
Temp Resistance	Limited	High-Temp Anti-Aging
Flow Control	Fixed Speed	Frequency Conv. Compatible
Lifespan	Moderate	Extended Industrial Grade

Frequently Asked Questions

Q: Can the 250QJR pump be used for muddy or turbid water?

No. This is a clean water pump. Using it to extract sediment or turbid water can cause premature wear and damage to the internal components.

Q: What is the maximum diving depth for this submersible pump?

The maximum diving depth for the 250QJR series is 70 meters, provided it is installed vertically and submerged completely.

Q: How do I prevent the motor from burning out during operation?

Ensure the pump is never run without water (no-load), maintain flow between 0.7-1.2 times the rated flow, and use external overload protection.

Q: Is a frequency converter necessary for this pump?

It is not mandatory but highly recommended, as it allows the pump to automatically adjust its output based on water consumption, saving energy.

Q: What maintenance is required for winter storage?

You must drain the water from the motor cavity to prevent freezing, which could cause internal damage to the motor structure.

Q: How should the pump be positioned in the well?

The pump must be installed vertically. It should be at least 3 meters above the bottom of the well to avoid sucking in mud.

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