Acid and alkali resistant pump

Product Manual：

 I. Core Definition ：

Acid-alkali resistant pumps constitute specialised fluid transfer equipment designed specifically for conveying corrosive media. They are primarily employed for transporting various acidic solutions, alkaline solutions, saline solutions, corrosive chemical raw materials, and acid-alkali containing wastewater.

The fundamental distinction from ordinary clean water pumps and sewage pumps lies in the fact that all wetted components of the pump body are manufactured from corrosion-resistant materials (such as fluoroplastics, stainless steel 316L, PVDF, Hastelloy, etc.), coupled with reinforced sealing structures. This enables long-term stable operation under severe conditions such as strong corrosion, high temperatures, and high concentrations, preventing both medium erosion and leakage. They are indispensable specialised pumps in fields including chemical processing, environmental protection, electroplating, and pharmaceutical manufacturing.

 II. Primary Function：

1.Safe Conveyance of Corrosive Media

Reliably transports highly corrosive fluids including sulphuric acid, hydrochloric acid, nitric acid, sodium hydroxide, sodium hypochlorite, electroplating solutions, etching solutions, and desulphurisation liquids, preventing rapid corrosion, perforation, and failure common in conventional metal pumps.

2.Preventing Media Leakage to Safeguard Production and Environmental Protection

Employing leak-proof structures such as magnetic drive and mechanical seals minimises leakage of toxic, hazardous, and highly corrosive media, thereby reducing risks of safety incidents and environmental non-compliance.

3.Extending Equipment Lifespan and Reducing Operational Costs

Corrosion-resistant materials significantly enhance pump longevity, curbing production losses from frequent replacements, repairs, and downtime.

4.Meeting specialised process requirements

Suitable for chemical reactions, circulation spraying, wastewater treatment, chemical dosing, acid washing, etching, desulphurisation, denitrification, and other process stages, ensuring continuous and stable production flows.

5.Adapting to complex operating conditions

Capable of handling extreme temperatures (high/low), particulate-laden fluids, high-viscosity substances, flammable/explosive materials, and high-purity applications, meeting stringent requirements across diverse industries.

III.Core Composition (by Functional Modules)：

• Pump Tube Body: Made of PVDF (Polyvinylidene Fluoride), featuring resistance to strong acids, strong alkalis, strong oxidants, and organic solvents. It is suitable for 98% sulfuric acid, hydrochloric acid, NaOH, electroplating solutions, etching fluids, etc.
• Impeller: Closed/semi-open PVDF impeller with an axial flow structure, designed for low head and large flow rate, ideal for suction and circulation in drums.
• Guide Vane Cylinder/Pump Chamber: Lined with PVDF to guide the axial flow of the medium, reducing resistance and corrosion.

• Suction Port/Filter Screen: PVDF material equipped with a filter screen (≤3mm) to prevent particles, protecting the impeller and seal.

• Liquid Outlet: Standard caliber (commonly DN25) with PVDF or corrosion-resistant joints, compatible with hoses/hard pipes.

• Shaft: Stainless steel shaft coated with PVDF or full PVDF shaft, preventing medium corrosion.

• Bearings: Wear-resistant and corrosion-resistant bushings + deep groove ball bearings, suitable for long-term continuous operation.

• Sealing System: Shaftless seal/magnetic coupling + fluoroelastomer (FKM) skeleton oil seal, achieving zero leakage/low leakage, suitable for strongly corrosive, toxic, and volatile media with strict environmental requirements.

3. Drive and Connection (Motor + Flange)

• Motor (E2-V): Single-phase/three-phase asynchronous motor, optional explosion-proof and stepless speed regulation, equipped with overheating/overload protection, suitable for hazardous chemical areas.

• Connecting Flange: Threaded quick-install structure, allowing tool-free disassembly and assembly for easy maintenance and pump tube replacement.

• Bracket/Handle: Engineering plastic/anti-corrosion coating, supporting the pump body for convenient insertion into drums/tanks.

IV.Working Principle (Axial Flow Drum Pump)：