QBY1 Series Stainless Steel Air Operated Diaphragm Pump

Product Description

The QBY series air operated diaphragm pump is designed for transferring corrosive liquids, chemical solutions and fluids containing small solid particles. Constructed with 304 stainless steel, the pump offers corrosion resistance, wear resistance and durable performance in demanding industrial environments. Available in QBY1-15, QBY1-25 and QBY1-40 models, it supports different flow requirements for chemical processing, industrial fluid handling and liquid transfer applications.

Key Features

• 304 Stainless Steel Construction: Provides durability and resistance to many corrosive media.
• Air Operated Design: Uses compressed air as the driving power source.
• Versatile Fluid Handling: Suitable for compatible chemical liquids and fluids containing small solid particles.
• Multiple Model Options: Three models offer different flow rates and connection sizes.
• Maintainable Structure: Diaphragm and valve components support routine inspection and maintenance.

Applications

• Chemical manufacturing and processing
• Transfer of compatible acids and alkaline solutions
• Industrial liquid handling
• Transfer of liquids containing small solid particles
• Chemical storage and supply systems
• General process-fluid transfer

Technical Specifications

Main Configuration

Product Advantages

• Corrosion Resistance: Stainless steel construction supports handling of a range of compatible industrial chemicals.
• Flexible Model Selection: Choose a model according to required flow rate, suction lift and connection size.
• Particle Handling: The listed particle diameter varies by model, supporting selection for fluids containing small solids.
• Industrial Durability: The mechanical design is intended for repeated fluid-transfer operations in suitable working conditions.

FAQ

1. What is an air operated diaphragm pump, and how does it work?

An air operated diaphragm pump uses compressed air to move a diaphragm back and forth. This movement changes the volume inside the pumping chamber, while the inlet and outlet check valves control the direction of liquid flow. The design enables fluid transfer without an electric motor directly driving the liquid-handling mechanism.

2. Which QBY model should I choose for my required flow rate?

The QBY1-15 is listed at 22 L/min, the QBY1-25 at 57 L/min, and the QBY1-40 at 378.5 L/min. Select a model based on the required delivery rate, fluid characteristics, pipework resistance and operating conditions. Actual flow depends on the available compressed-air supply and the system’s back pressure.

3. Can the QBY series pump transfer corrosive chemicals or liquids containing solid particles?

The 304 stainless steel construction is suitable for many industrial fluid applications, and the catalog lists different maximum particle diameters for each model. However, stainless steel is not compatible with every chemical. Check the chemical concentration, temperature and compatibility of all wetted components—including the diaphragm, valve balls and seals—before selecting a pump.

4. What should be considered when sizing an air operated diaphragm pump for an industrial system?

Key factors include required flow rate, total discharge head, suction lift, liquid viscosity, solid-particle size and the available compressed-air pressure and volume. The inlet and outlet pipe sizes should also match the system requirements. Evaluate these factors together rather than selecting a pump by flow rate alone.

5. What maintenance is required for a stainless steel diaphragm pump?

Regular maintenance typically includes checking the diaphragm, ball valves, valve seats, seals, air distribution mechanism and fluid connections for wear or leakage. The inspection interval depends on operating frequency, fluid abrasiveness, chemical compatibility and air quality. Isolate the compressed-air supply and depressurize the system before servicing the pump.