QBY1-15 Double Diaphragm pump PP 1/2”

Product Description

The QBY-PP Series Polypropylene Air Operated Double Diaphragm Pump is designed for transferring compatible corrosive chemicals, industrial liquids, and fluids containing small solid particles. Featuring a polypropylene (PP) liquid-contact body and a compressed-air-driven diaphragm mechanism, the pump supports fluid transfer without requiring an electric motor to directly drive the pumping process. Available in QBY-15PP, QBY-25PP, and QBY-40PP models, the series provides different flow capacities and particle-handling capabilities for chemical processing, surface treatment, and other industrial fluid handling applications.

Key Features

• Polypropylene Construction: The PP pump body offers chemical resistance to many compatible acids, alkalis, and industrial liquids.
• Air Operated Design: Uses compressed air to drive the diaphragm pumping mechanism.
• Leak-Controlled Pumping Mechanism: The diaphragm separates the pumped liquid from the air-driving mechanism during normal operation.
• Multiple Model Options: Three models accommodate different flow rates and solid particle sizes.
• Chemical Transfer Applications: Suitable for compatible corrosive and process liquids.
• Maintainable Structure: Diaphragms, ball valves, and valve seats can be inspected according to the manufacturer’s maintenance instructions.

Applications

• Compatible acid and alkali transfer
• Chemical processing and dosing systems
• Electroplating and surface treatment
• Industrial wastewater handling
• Transfer of compatible liquids containing small solid particles
• Chemical storage and supply systems
• Industrial liquid transfer in manufacturing facilities

Technical Specifications

Product Advantages

Chemical Resistance

The polypropylene pump body is suitable for many chemical transfer applications. Actual chemical resistance depends on the liquid’s composition, concentration, temperature, and the compatibility of all wetted components.

Compressed-Air Operation

The pneumatic drive operates using compressed air, eliminating the need for an electric motor directly driving the liquid pumping mechanism. A properly sized air supply is required for the intended flow and pressure conditions.

Flexible Model Selection

The QBY-15PP, QBY-25PP, and QBY-40PP offer different catalog flow rates and maximum particle diameters, allowing buyers to select a model based on the required transfer volume and liquid characteristics.

Diaphragm-Based Fluid Separation

The diaphragm separates the liquid chamber from the air distribution mechanism during normal operation, helping prevent the transferred liquid from entering the air-drive section.

Practical Industrial Maintenance

The diaphragm, ball valves, and valve seats are key service components. Regular inspection and timely replacement of worn parts can help maintain stable performance and reduce unplanned downtime.

Frequently Asked Questions

1. Which chemicals can the QBY-PP polypropylene diaphragm pump transfer?

The QBY-PP series is designed for compatible industrial chemicals, including selected acids, alkalis, and process liquids. Polypropylene resists many chemicals, but it is not compatible with every solvent or chemical formulation. Before selecting a pump, verify the chemical name, concentration, operating temperature, and compatibility of the diaphragm, valve balls, seals, and other wetted components with the manufacturer.

2. How do I choose between the QBY-15PP, QBY-25PP, and QBY-40PP models?

Choose according to the required flow rate, discharge head, suction lift, and maximum solid particle size. The catalog lists flow rates of 22 L/min for QBY-15PP, 57 L/min for QBY-25PP, and 378.5 L/min for QBY-40PP. Actual flow depends on the compressed-air supply, liquid viscosity, and system back pressure. Confirm the operating conditions before choosing a model, especially when transferring viscous or particle-containing liquids.

3. Can a QBY-PP diaphragm pump handle corrosive liquids containing solid particles?

The catalog lists maximum particle diameters of 1.5 mm for QBY-15PP, 2.5 mm for QBY-25PP, and 3.5 mm for QBY-40PP. These figures help determine whether a model may be suitable for a liquid containing small suspended solids. Particle hardness, shape, concentration, and abrasiveness also affect wear and operating reliability. Confirm both particle-handling capability and chemical compatibility before use.

4. What compressed-air supply is required for the QBY-PP air operated diaphragm pump?

The pump requires a suitable compressed-air supply to operate its diaphragm mechanism. Required air pressure and consumption depend on the pump model, desired flow rate, discharge pressure, and liquid properties. The catalog lists air consumption in cubic metres but does not provide a time basis or the corresponding air pressure. Obtain the manufacturer’s complete air consumption curve and operating pressure range before sizing the air compressor and supply line.

5. Is a polypropylene diaphragm pump suitable for concentrated acids, alkalis, and organic solvents?

Suitability depends on the specific chemical, concentration, temperature, and the materials used in every liquid-contact component. Polypropylene can resist many acids and alkalis, but certain chemicals and organic solvents may attack PP or other pump components. Do not select the pump based on body material alone. Confirm chemical compatibility with the manufacturer and follow the relevant requirements for handling corrosive or hazardous liquids.