Slurry Pump, Screw Pump or Air Diaphragm Pump is the best choice for your filter press?

Different slurry properties, operating conditions, and industries require completely different pumps. As a professional brand in solid-liquid separation, KERTE Filter Press helps customers accurately match pumps with real operating conditions to improve filtration efficiency.

Among filter press feeding systems, three pumps are most commonly used: air operated diaphragm pumps, screw pumps, and slurry pumps.

Air Operated Diaphragm Pump – Safe and Flexible for Hazardous Fluids

Air diaphragm pumps use compressed air as the power source, eliminating the need for electricity and avoiding spark generation during operation. This makes them ideal for explosive, flammable, and corrosive environments.

These pumps are easy to operate, support dry running, and allow flexible flow adjustment. They are widely used in chemical processing, hazardous waste treatment, coatings, and corrosive liquid transfer applications.

However, diaphragm pumps typically have lower energy efficiency and may generate vibration during operation, often requiring pulsation dampeners for smoother flow.

Screw Pump – Stable Transfer for High-Viscosity Materials

Screw pumps are positive displacement pumps designed for smooth and continuous material transfer. They operate with low noise, minimal vibration, and gentle handling of sensitive materials.

Their biggest advantage is the ability to transport high-viscosity fluids, including paste-like materials, flocculants, paint, sludge, and fluids containing fine fibers or small particles.

Because the rubber stator has temperature and wear limitations, screw pumps are not suitable for highly abrasive slurries or large solid particles. They are commonly used in food processing, pharmaceuticals, and fine chemical industries where stable and low-shear conveying is essential.

Slurry Pump – Heavy-Duty Solution for Abrasive Mining Slurry

Slurry pumps are designed specifically for heavy-duty industrial environments. With large impeller passages and wear-resistant structures, they can continuously transport high-density slurry containing large abrasive particles.

Compared with other pumps, slurry pumps provide higher head pressure and longer conveying distance, making them ideal for mining, coal washing, metallurgy, power plants, and tailings handling systems.

Their disadvantages include more complex structures, higher maintenance frequency, and limited capability for handling highly viscous materials.

At KERTE Filter Press,our engineering team analyzes slurry characteristics, operating conditions, and project requirements to help customers select the most suitable pump and filtration system combination for maximum performance and long-term reliability.