PVDF Diaphragm Pumps
PVDF diaphragm pumps are made mainly from polyvinylidene fluoride, a plastic material selected for its resistance to strong chemicals. They are a good option when the pumped liquid may be too corrosive for standard plastic pumps, especially in processes involving strong acids, strong alkalis, organic solvents, or mixed chemical media. During operation, the diaphragms move back and forth inside the pump chambers, drawing liquid in and then pushing it out through the discharge side. Air-operated and electric versions are available to match different power sources and working conditions.
Our PVDF air-operated diaphragm pumps combine chemical resistance, stable transfer, and flexible operation for demanding liquid handling tasks. The main performance features include:
- Broad Fluid Compatibility: PVDF is a good option for strong acids, alkalis, many organic solvents, suspensions, and dispersed liquids, especially when PP is not resistant enough for the process.
- Self-Priming and Short Dry-Run Capability: PVDF diaphragm pumps can self-prime with a suction lift of about 3–7 m, depending on the model and working conditions. Air-operated models can also run dry for a short time without immediate damage.
- Good Solids Passage with Low Shear: The wide flow path handles particles up to 10 mm, depending on the pump size, and the low-shear diaphragm movement is suitable for fluids that may foam, separate, or change texture during pumping.
- Adjustable Flow and Pressure: Operators can control the flow rate and head through the air supply pressure, usually within 1–7 bar or 2–7 bar depending on the model and match the pump output to different process requirements.
Our PVDF air-operated diaphragm pumps run on compressed air, and the diaphragms keep the pumped liquid separated from the moving parts. These features support safer operation in applications that require good leakage control:
- Air-Driven Operation: Powered by compressed air instead of electricity at the pump body, the pump operates without electric sparks and is suitable for flammable liquids or explosion-proof working areas.
- Seal-Free Fluid Chamber: The diaphragm keeps the pumped liquid separated from the moving parts and reduces leakage risk when handling corrosive, volatile, or hazardous liquids.
PVDF diaphragm pumps are suitable for different process areas because they are easier to install, move, and service. The following design options support flexible use on site:
- Flexible Installation: Threaded and flanged connections are available for different pipeline layouts. The PVDF body is lighter than many metal pump bodies, so installation and movement are easier.
- Simple Maintenance: PVDF diaphragm pumps have a simple structure with fewer wear parts, so it’s easier to disassemble, repair, and maintain with less downtime.
- Multiple model options: Different models, such as GK06, GK10, and GK25, are available for different flow rates and head requirements.
PVDF diaphragm pumps are used in chemical processing, electroplating, wastewater treatment, and other applications that involve corrosive or chemically aggressive liquids, including:
- Chemical Processing: Strong acids, alkalis, organic solvents, suspensions, and dispersed liquids
- Electroplating and Surface Treatment: Plating solutions, cleaning liquids, and other corrosive process fluids
- Wastewater Treatment: Acidic, alkaline, or chemically mixed wastewater
- Pharmaceutical Production: Raw materials, intermediates, and finished liquid products that require clean and compatible fluid handling
- Food-Related Processes: Acidic or mildly alkaline additives, seasonings, and similar liquid ingredients, depending on the required hygiene standard and pump configuration
