1. Product introduction
Some impellers of LQFZ
direct coupled corrosion-resistant stainless steel self-priming pumps
adopt semi open structure, while others adopt closed structure. In
addition, the pump and motor are connected in two ways: direct coupled
type and bracket type with bearings. All pump shaft seals adopt
mechanical seals with the current advanced cantilever technology in West
Germany. Stainless steel corrosion-resistant centrifugal pumps combine
excellent structure, performance and shape, The components and
connecting frame of the secondary flow passage are made of high-quality
stainless steel. Therefore, the two series of products have a series of
advantages, such as corrosion resistance, reliable performance,
convenient use and maintenance, compact structure, low energy
consumption, and good sealing performance.
2. Product pictures
3. Scope of application
LQFZ directly
connected stainless steel corrosion resistant self-priming pump is used
to transport liquids with corrosivity, hygiene requirements and low
viscosity, and is widely used in food, beverage, medicine, cosmetics,
sewage treatment, chemical (or fine chemical), electroplating and other
industries.
4. Product Features
1. The
centrifugal pump is made of corrosion-resistant and stainless steel
materials. It not only has corrosion-resistant properties, but also has
the characteristics of centrifugal pump. In terms of service life, it
also has a long service life because of the use of stainless steel
materials.
2. The pump also has self-priming function. It only
needs to fill the liquid for the first time to exhaust the air, and then
it can directly absorb the material.
3. The installation method
of stainless steel self-priming Corrosion resistant centrifugal pump is
also very simple as long as the pipeline is not pressed above the pump.
5. Model Meaning
6. Specifications
Note: 1. If the parameters are different from those in the table
during the model selection process, our factory can improve the model
selection through technology.
7. Installation method
(1)
The stainless steel self-priming pump shall be installed and fixed on a
stable foundation. It is better to lay a cushion between the base and
the foundation. Ensure that the pump will not affect the vibration of
the pipeline when it is started. The pump is not affected by other
mechanical vibration.
(2) When installing the pipeline, it shall
be noted that the inlet and outlet pipelines of the pump shall not exert
force on the pump and shall be equipped with corresponding supports.
(3)
The pump shall be installed as close to the material as possible (the
shorter the inlet pipeline, the faster the self-priming time.)
(4)
Sufficient maintenance space shall be reserved for the pump during
installation to facilitate equipment maintenance in the later period.
8. Precautions
(1)
The stainless steel self-priming pump shall be filled with enough
liquid before use. It is strictly forbidden to start the pump when there
is no liquid or insufficient liquid.
(2) Turn on the power
supply, click the start switch first to see whether the running
direction of the motor is consistent with the rotation direction of the
pump. If not, correct it immediately, and do not reverse it.
(3) The unit operates for 5-10 minutes. If there is no abnormal phenomenon, it can be put into operation.
(4) During shutdown, the outlet valve shall be closed first, and then the power supply shall be cut off.
9. Frequently Asked Questions
(1) If the water pump does not discharge water, it may be that there is air in the pump chamber.
(2)
Insufficient pump flow may be caused by partial blockage of pipes and
impeller of pump flow passage, insufficient valve opening, etc.
(3) Excessive pump power may be used beyond the rated flow.
(4) Noise and vibration may be caused by unstable pipeline support, gas mixed with liquid, bearing damage, etc.
10. Use needs
(1)
The disassembly sequence is as follows: remove the motor, bracket,
bottom plate screws, remove the mechanical seal cover, loosen the
dynamic ring snap ring bolts, static ring pressure plate bolts, front
and rear pump cover bolts, unscrew the vane screw of the impeller shaft
pull rod, screw out 3~5mm, knock the pull rod with a hammer, and then
remove the pull rod, impeller and mechanical seal after loosening the
impeller. When removing the mechanical seal, it should be manually
operated, and it should not be knocked with metal tools to prevent
damage.
(2) If cavitation occurs when the pump is running, it must be stopped within 1 minute.
(3) When the pump is shut down for a long time, the inner flow passage of the pump shall be cleaned.
(4)
If the power is cut off suddenly when the pump is running, the power
must be turned off immediately and the outlet valve must be closed.
(5)
If the specific gravity of the conveying medium is greater than 1.2, an
additional motor shall be provided, otherwise the lift will be affected
or the motor will be burnt.
LQFZ Stainless Steel Self-Priming Corrosion resistant centrifugal pump
The LQFZ stainless steel self-priming corrosion resistant centrifugal pump is a high-performance pumping solution designed for industrial, chemical, and water treatment applications. Its stainless steel construction, self-priming capability, and corrosion-resistant design make it ideal for handling aggressive fluids while ensuring efficient, safe, and reliable operation.
Product Overview
The LQFZ pump combines modern centrifugal pump technology with self-priming functionality, enabling it to operate without manual priming. This feature is particularly useful in chemical plants, wastewater treatment facilities, and industrial process systems, where fluid levels can fluctuate or pipelines may contain air.
Key Features:
Stainless steel body and impeller for maximum corrosion resistance
Self-priming design for easy start-up and continuous operation
High-efficiency centrifugal mechanism for stable flow and minimal energy consumption
Durable seals and gaskets to prevent leaks and chemical contamination
Modular installation options suitable for horizontal or vertical setups
Typical Applications:
Chemical industry for acid, alkali, and solvent transfer
Industrial water circulation and cooling systems
Food and beverage production requiring corrosion-resistant fluid handling
Wastewater treatment and corrosive effluent transfer
Application Cases
Case Study 1: Chemical Plant Fluid Transfer
In a large chemical manufacturing plant, the LQFZ pump was installed to transfer highly corrosive liquids between processing tanks. Its stainless steel construction and reliable self-priming feature enabled uninterrupted operation while minimizing maintenance downtime.
Case Study 2: Wastewater Treatment Facility
A municipal wastewater treatment plant used the LQFZ pump to circulate and transfer chemically treated water. The pump’s corrosion-resistant body and centrifugal efficiency ensured consistent water flow and long service life in a harsh environment.
Case Study 3: Industrial Cooling System
In an industrial cooling system, the LQFZ pump facilitated continuous circulation of cooling fluids. Its self-priming capability allowed operation even when air entered the pipeline, reducing the risk of cavitation and system downtime.
Installation Guide
Proper installation is essential for the optimal performance and longevity of the LQFZ pump.
Installation Steps:
Foundation Preparation: Ensure a level and stable base to prevent vibration.
Pipeline Connection: Connect inlet and outlet pipelines securely, ensuring no air leaks.
Check Valves and Filters: Install check valves to prevent backflow and strain screens to protect the impeller.
Alignment: Align the pump shaft with the motor to prevent misalignment-induced wear.
Priming: Fill the pump casing with fluid before the first start-up if required.
Electrical Connection: Connect the motor according to manufacturer specifications and ensure grounding.
Startup Test: Run the pump briefly without load to verify rotation, flow, and leakage.
Installation Tips:
Avoid excessive pipeline bends near the inlet to reduce priming issues.
Maintain a minimum suction lift to prevent cavitation.
Ensure ambient temperature and humidity are within pump specifications.
Customer Feedback
The LQFZ pump has been widely praised by industrial operators and chemical engineers for its durability, efficiency, and ease of use.
Highlighted Benefits:
“Reliable corrosion resistance” – Handles aggressive chemicals without material degradation
“Easy to install and operate” – Self-priming reduces setup time and operational errors
“Low maintenance costs” – Durable stainless steel and high-quality seals extend service life
“Stable performance under varying conditions” – Maintains consistent flow even with fluctuating liquid levels
Customer Testimonials:
Chemical Plant Manager: “The LQFZ pump has significantly improved our chemical transfer process with minimal downtime.”
Water Treatment Supervisor: “Its self-priming feature allows smooth operation even during low water conditions.”
Industrial Engineer: “Stainless steel construction ensures long-term reliability in a highly corrosive environment.”
Storage and Handling
Proper storage and handling of the LQFZ pump ensures longevity and peak performance.
Storage Guidelines:
Store in a dry, well-ventilated area to prevent corrosion or moisture damage.
Keep the pump elevated from the ground to avoid water contact.
Protect the pump from dust, debris, and chemical exposure.
Apply protective coatings or oils to the impeller and shaft if stored for extended periods.
Cover electrical components to prevent humidity-related damage.
Handling Precautions:
Use mechanical lifting equipment for heavy models to prevent injury.
Avoid dropping or striking the pump, which may damage internal components.
Inspect seals and connections before commissioning after storage.
Technical Specifications
| Parameter | Specification |
|---|
| Pump Type | Self-priming centrifugal |
| Material Body/Impeller | Stainless Steel (SS304/SS316 options) |
| Maximum Flow Rate | Up to 200 m³/h |
| Maximum Head | Up to 70 m |
| Operating Temperature | -20°C to 120°C |
| Maximum Viscosity | 200 cP |
| Seal Type | Mechanical or PTFE seal |
| Power Supply Options | 380V/220V, single-phase or three-phase motor |
Maintenance Tips
Regular Inspection: Check seals, bearings, and impellers monthly.
Lubrication: Follow manufacturer guidelines for motor and bearing lubrication.
Cleaning: Flush pump after transferring corrosive fluids to prevent residue buildup.
Replacement: Replace worn seals, gaskets, and impellers promptly to maintain efficiency.
Operational Checks: Monitor flow rate, pressure, and noise for early detection of issues.
Conclusion
The LQFZ stainless steel self-priming corrosion resistant centrifugal pump is a reliable, efficient, and versatile solution for chemical, industrial, and water treatment applications. Its stainless steel construction, self-priming capability, and robust design provide long-term operational reliability, low maintenance, and exceptional chemical resistance.
With proven performance in real-world applications, positive customer feedback, and adherence to storage and maintenance best practices, the LQFZ pump is a preferred choice for industries requiring safe, efficient, and durable fluid handling solutions.
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