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QDX Submersible Pump


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The QDX series water pump is a water lifting machine powered by a submersible motor, and the motor and the water pump are assembled into an integrated submersible operation. It uses stainless steel or cast iron shell design, and consists of three parts: water pump, seal, and motor. The motor is located on the upper part of the electric pump, which is a single-phase or three-phase motor structure. The water pump is located on the lower part of the electric motor and adopts an upper water-absorbing structure to prevent the phenomenon of blockage caused by the electric pump being trapped in the sludge. It is generally used in agricultural irrigation, river water intake, commercial building water supply and drainage. Among them, the stainless steel QDX water pump has the characteristics of anti-rust, corrosion resistance, pollution-free, etc. It is widely used in clean water, seawater and sewage with few solid particles. It is used in various special requirements such as slight corrosion, sanitation and cleanliness, chemical industry, seawater aquaculture, food and beverages, etc.

Model:
QDX
Brand:
SRM

Product Description

FAQ

Product Advantage

Key Advantages of QDX Series Submersible Pumps

1. Superior Durability

Full Stainless Steel/Cast Iron Options: Stainless steel models (AISI 304/316) resist rust and corrosion, ideal for seawater and harsh chemical environments; cast iron models offer cost-effective durability for clean water applications.

Double Mechanical Seals 3x more reliable sealing, with a lifespan exceeding 8,000 hours.

Clog-Resistant Design: Top suction structure + solid particle handling capability, preventing sludge blockage.

2. High Efficiency & Energy Saving

Optimized Hydraulic Design: 15%-20% higher efficiency than standard submersible pumps, reducing long-term operating costs.

Low-Energy Motor (Single/Three-Phase Options): Complies with IE3 efficiency standards, saving up to 30% energy in certain conditions.

3. Safety & Reliability

Multi-Protection System: Overheat protection, dry-run prevention (optional), and leakage monitoring to eliminate motor burnout risks.

Corrosion-Resistant FKM Seals: Suitable for fluids with pH 2-11, including mildly corrosive liquids.

4. Versatile Adaptability

Wide Performance Range: Flow rate 5-100m³/h, head 10-60m, meeting diverse needs from agricultural irrigation to industrial drainage.

20m Max. Submersion Depth: Ideal for deep wells, rivers, and other challenging water extraction scenarios.

5. Easy Maintenance

Modular Design: Quick disassembly—seals and bearings can be replaced without specialized tools.

Lightweight Construction** (as light as 15kg): Easy installation and handling by a single person.

Typical Applications

Agricultural Irrigation

Seawater Aquaculture

Hygienic Water Transfer in Food Plants

Construction Site Drainage

Chemical Fluid Transfer

Municipal Emergency Pumping

Technical Parameters

Operating conditions

Maximum fluid temperature up to +40℃.Maximum sand content:0.25%.

Motor and Pump

Rewindable motor Three-phase:380V-415V/50Hz Single-phase:220V-240V/50Hz

Options on request

Stainless steel Corp

Multi impellers

Special mechanical seal

Other voltages or frequency 60 Hz

Model Optional

QDX submersible pump
Model	Power		Capacity	Head	speed	Outlet
Model	Power		(m³/h)	(m)	(r/min)	(mm)
1~	KW	HP
220V/240V	KW	HP
QDX1.2-12-0.25	0.25	0.33	1.2	12	2900	25
QDX1.5-17-0.37	0.37	0.5	1.5	17	2900	25
QDX3-10-0.37	0.37	0.5	3	10	2900	40
QDX1.5-25-0.55	0.55	0.75	1.5	25	2900	25
QDX10-10-0.55	0.55	0.75	10	10	2900	50
QDX1.5-32-0.75	0.75	1	1.5	32	2900	25
QDX10-16-0.75	0.75	1	10	16	2900	50
QDX15-10-0.75	0.75	1	15	10	2900	65
QDX30-6-0.75	0.75	1	30	6	2900	80
QDX3-38-1.1	1.1	1.5	3	38	2900	25
QDX6-33-1.1	1.1	1.5	6	33	2900	40
QDX10-20-1.1	1.1	1.5	10	20	2900	50
QDX30-9-1.1	1.1	1.5	30	9	2900	80
QDX40-9-1.5	1.5	2	40	9	2900	80
QDX6-25-1.1	1.1	1.5	6	25	2900	50
QDX6-28/2-1.1	1.1	1.5	6	28	2900	50
QDX6-32/2-1.5	1.5	2	6	32	2900	50
QDX65-7-2.2	2.2	3	65	7	2900	100

QDX stainless steel multistage submersible pump
Model	Power		Capacity	Head	speed	Outlet
Model	Power		(m³/h)	(m)	(r/min)	(mm)
1~	KW	HP
220V/240V	KW	HP
QDX6-28/2-1.1	1.1	1.5	6	28	2900	50
QDX6-32/2-1.1	1.1	1.5	6	32	2900	50
QDX10-45/4-1.1	1.1	1.5	10	45	2900	50
QDX6-50/4-1.5	1.5	2	6	50	2900	50
QDX10-55/5-1.5	1.5	2	10	55	2900	50
QDX6-60/5-2.2	2.2	3	6	60	2900	50
QDX10-70/6-2.2	2.2	3	10	70	2900	50
QDX4-75/8-2.2	2.2	3	4	75	2900	50
QDX6-70/6-3	3	4	6	70	2900	50
QDX10-80/7-3	3	4	10	80	2900	50

QDX-S stainless steel submersible pump
Model	Power		Capacity	Head	speed	Outlet
Model	Power		(m³/h)	(m)	(r/min)	(mm)
1~	KW	HP
220V/240V	KW	HP
QDX1.2-12-0.25S	0.25	0.33	1.2	12	2900	25
QDX1.5-17-0.37S	0.37	0.5	1.5	17	2900	25
QDX3-10-0.37S	0.37	0.5	3	10	2900	40
QDX1.5-25-0.55S	0.55	0.75	1.5	25	2900	25
QDX10-10-0.55S	0.55	0.75	10	10	2900	50
QDX1.5-32-0.75S	0.75	1	1.5	32	2900	25
QDX10-16-0.75S	0.75	1	10	16	2900	50
QDX15-10-0.75S	0.75	1	15	10	2900	65
QDX30-6-0.75S	0.75	1	30	6	2900	80
QDX3-38-1.1S	1.1	1.5	3	38	2900	25
QDX6-33-1.1S	1.1	1.5	6	33	2900	40
QDX10-20-1.1S	1.1	1.5	10	20	2900	50
QDX30-9-1.1S	1.1	1.5	30	9	2900	80
QDX40-9-1.5S	1.5	2	40	9	2900	80
QDX6-25-1.1S	1.1	1.5	6	25	2900	50
QDX6-28/2-1.1S	1.1	1.5	6	28	2900	50
QDX6-32/2-1.5S	1.5	2	6	32	2900	50
QDX65-7-2.2S	2.2	3	65	7	2900	100

Standard applications

Agricultural irrigation

River water extraction

Commercial water supply systems

Drainage operations

Specialized applications (stainless steel models)

Seawater aquaculture

Food/beverage processing

Chemical fluid transfer (mildly corrosive)

Wastewater with ≤5% solids content

How to Select the Right QDX Series Pump Model?

1. Determine the Required Flow Rate (m³/h)

Low Flow (5-20 m³/h): Small-scale irrigation, domestic water supply

Medium Flow (20-50 m³/h): Commercial buildings, aquaculture

High Flow (50-100 m³/h): Industrial drainage, large-scale irrigation

2. Check the Required Head (Pressure, in meters)

Low Head (10-20m): Shallow wells, short-distance water transfer

Medium Head (20-40m): Deep wells, multi-story building supply

High Head (40-60m): High-pressure systems, long-distance pumping

3. Select the Material Based on Liquid Type

Stainless Steel (AISI 304/316):
Seawater, mildly corrosive liquids (pH 2-11)
Food-grade applications (FDA compliant)
Chemical transfer, aquaculture

Cast Iron (Epoxy Coated):

Clean water (pH 6.5-8.5)
Agricultural irrigation, drainage
Cost-effective for non-corrosive use

4. Consider Motor Type (Single-Phase or Three-Phase)

Single-Phase (220V): Small farms, residential use

Three-Phase (380V): Industrial, high-power applications

5. Special Requirements?

Solids Handling: Choose models with 5mm particle tolerance

Deep Submersion: Verify max. depth (up to 20m)

Explosion-Proof: Available for hazardous environments

Quick Selection Guide

Application	Recommended Model	Flow (m³/h)	Head (m)	Material
Home Water Supply	QDX10-15	5-10	15-20	Cast Iron
Farm Irrigation	QDX25-30	20-30	25-35	Cast Iron
Seawater Aquaculture	QDX40-50 (SS)	30-50	20-30	Stainless
Industrial Drainage	QDX80-100	70-100	10-20	Cast Iron
Chemical Transfer	QDX20-25 (SS)	15-25	30-40	Stainless

FAQs

Need Help Provide your:

Liquid Type (water, seawater, chemical?)
Flow & Head Requirements
Power Supply (220V or 380V?)
We' recommend the best model!
What Makes SRM Pumps Different?

With over 40 years of expertise in professional pump manufacturing, SRM Group—a Top 500 Enterprise in China—stands out for its:
Mature Production System – Rigorous quality control ensures reliable, high-performance pumps.
Customer-Centric Approach – We customize solutions to meet specific needs.
End-to-End Support – Beyond a 1-year warranty, we provide ongoing service assistance.
Choose SRM for durable, tailored pumping solutions backed by decades of industry leadership.
How to Purchase SRM Pumps?

Purchasing SRM pumps is simple:
Contact Us – Visit our website and reach out via:
Email PhoneSocial Media DM
(A dedicated representative will assist you promptly.)
Can I Use My Own Logo?

Custom Branding Option – We support OEM/ODM services and can produce pumps with your logo, provided you:
Own the trademark OR
Have authorization from the trademark owner.

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