QBK Polypropylene Diaphragm Pump

Compared with traditional metal diaphragm pumps, the QBK series offers excellent corrosion resistance, lightweight construction, and easier maintenance, making it a practical choice for industries requiring reliable handling of mild to moderately corrosive liquids.

Based on the QBY series design, the QBK Polypropylene Diaphragm Pump features an optimized built-in air distribution valve structure, improving operating stability and extending service life. Its installation dimensions are compatible with conventional QBY models, allowing users to upgrade existing systems without modifying pipelines.

Engineering Plastic Structure

Fully Plastic Wetted Design

The QBK series uses PP polypropylene engineering plastic for liquid-contact components.

This structure provides:

- No metal contact with the transported medium

- Good resistance to common chemical liquids

- Lightweight pump construction

- Reduced risk of corrosion damage

It is especially suitable for applications where stainless steel or metal pumps may be unnecessary or uneconomical.

Optimized QBK Air Distribution System

Compared with traditional QBY diaphragm pumps, the QBK series improves the internal air control structure.

Benefits include:

- Smoother operation

- Reduced air valve wear

- Improved running stability

- Longer service intervals

The standard installation dimensions allow convenient replacement of existing QBY systems without major pipeline changes.

Cost-Effective Chemical Transfer Solution

For general chemical applications that do not require extreme temperature resistance or highly aggressive solvent handling, QBK Polypropylene Diaphragm Pump provides an economical alternative.

Compared with PVDF or stainless steel diaphragm pumps, PP construction offers:

- Lower equipment investment

- Easier maintenance

- Affordable spare parts

- Practical long-term operation

Technical Specifications

Key Features

Lightweight PP Construction

The polypropylene body reduces overall weight compared with metal pumps, making installation, transportation, and maintenance more convenient.

Excellent Resistance for General Chemicals

The PP material performs well when handling many inorganic salts, alkaline solutions, wastewater, and common chemical liquids.

Easy Maintenance Design

The modular structure allows convenient replacement of key wearing parts such as diaphragms, ball valves, and valve seats, reducing maintenance downtime.

Flexible Particle Handling

The diaphragm pumping principle allows the transfer of liquids containing certain solid particles without damaging the pump structure.

No Electrical Power Required

Powered by compressed air, the pump can operate in environments where electrical equipment is inconvenient or unsuitable.

Applications

Chemical Processing

Used for transferring diluted acids, alkali solutions, chemical additives, and process liquids.

Electroplating Industry

Suitable for handling plating solutions and chemical treatment liquids.

Wastewater Treatment

Applied in wastewater transfer, chemical dosing, and environmental equipment.

Industrial Cleaning Systems

Used for cleaning agents and process fluids requiring corrosion-resistant materials.

General Chemical Transfer

A practical solution for factories requiring economical and reliable liquid handling equipment.

Material Compatibility

The QBK Polypropylene Diaphragm Pump is recommended for:

- Diluted acids

- Alkali solutions

- Salt solutions

- Wastewater

- Chemical additives

- Some organic solvents

For highly concentrated acids, strong oxidizers, or extreme temperature applications, alternative fluoroplastic-lined solutions may be more suitable.

FAQ

Q: What is a QBK Polypropylene Diaphragm Pump?

A: A QBK Polypropylene Diaphragm Pump is an air-operated diaphragm pump made mainly from PP engineering plastic, designed for transferring mild to moderately corrosive liquids.

Q: What is the difference between QBK and QBY diaphragm pumps?

A: The QBK series improves the internal air distribution structure of the QBY design, providing smoother operation while maintaining compatible installation dimensions.

Q: What liquids can a PP diaphragm pump handle?

A: PP diaphragm pumps are suitable for diluted acids, alkaline solutions, wastewater, plating liquids, and many general chemical fluids.

Q: Is the QBK diaphragm pump suitable for strong corrosive chemicals?

A: For extremely corrosive chemicals such as concentrated acids or strong solvents, fluoroplastic-lined diaphragm pumps are usually recommended. QBK models are better suited for general corrosion-resistant applications.

Q: Can Xiafeng supply customized diaphragm pumps?

A: Yes. Xiafeng supports OEM customization according to different materials, specifications, and industrial application requirements.