G-type single screw pumps are used for the feed of plate and frame filter presses.
The performance parameters of most G-type single screw pumps comply with the JB/T8644-1997 standard and have been certified by the Ministry of Machinery Industry. G-type filter press feed screw pumps are widely used for conveying media such as crude oil, waste oil, ore slurry, mud, chemical and chemical fiber slurries, glue, paint, syrup, jam, cosmetics, and concentrated wastewater.
The AJ models of the G40 and G50 pumps feature a pin-type universal drive.
Material: Standard or stainless steel pumps are available, tailored to individual customer requirements. Stainless steel is typically 1C-18Ni9Ti, with 1C-18Ni12Mo2Ti or other materials available upon request. The stator rubber is typically nitrile rubber, but EPDM, food-grade rubber, polyurethane rubber, and fluororubber are also available.
Working Principle of the G-Type Feed Screw Pump for Filter Presses
A single-screw pump is an internally meshing rotary positive displacement pump. As the single-thread rotor rotates planetarily around the stator axis within the double-thread stator bore, the enclosed chamber formed between the rotor and stator pairs continuously, uniformly, and with constant volume, transports the medium from the suction end to the discharge end.
Due to these characteristics, single-screw pumps are particularly suitable for the following working conditions:
Transporting high-viscosity media. The viscosity of the media ranges from 20,000 MPa.s to 200,000 MPa.s, depending on the size of the pump.
Media containing solid particles or fibers. Particle size can be as large as 16 mm (not exceeding rotor eccentricity), and fiber length can be up to 100 mm (equivalent to 0.4 times the rotor pitch). The solids content is generally up to 40%. When the solids content in the medium is fine powder, it can reach 60% or higher.
Continuous delivery and stable pressure are required, without the periodic pressure fluctuations of reciprocating pumps.
The conveying medium temperature should be -10°C to 80°C (up to 150°C for special pumps).
The conveying process should be minimally agitated and not disrupt the inherent structure of the conveyed medium.
The conveying process should also be low noise.
Notes on Screw Pump Selection for Filter Presses
1. Select a pump with different speeds and specifications based on the viscosity and abrasiveness of the medium, as well as the required flow rate and pressure, to ensure reliable operation. Please refer to the selection guide. For media with particularly high abrasiveness and viscosity, our GN-type single screw pump, designed specifically for high-viscosity conveying, can be selected.
2. If the user requires a reversible pump, this should be specifically stated when ordering so that the manufacturer can fully consider this requirement and take necessary measures to meet it.
3. If a different power unit or backup system is required, these must also be specified in the order.
4. When ordering, please provide detailed information on the physical and chemical properties of the conveying medium and the system requirements. Please note this.
The G Feeding Screw Pump for Filter Presses is a high-efficiency, robust industrial pump designed specifically to feed slurry, sludge, and high-viscosity fluids into filter press systems. Engineered for continuous and reliable operation, this screw pump ensures uniform, pulsation-free flow to maintain consistent filter cake formation, improve filtration efficiency, and reduce downtime.
Constructed from 316L stainless steel, duplex, or abrasion-resistant alloys, the G Feeding Screw Pump is suitable for handling slurries with high solid content, abrasive materials, and shear-sensitive fluids. Its rotor-stator design provides smooth transfer while minimizing shear and protecting the integrity of the materials.
Designed for industrial applications, the pump can handle variable viscosities, temperatures, and particle sizes, making it an essential component in mining, chemical, wastewater treatment, and food processing plants. The pump is available in seal-less or mechanical seal configurations, allowing for hygienic or aggressive fluid transfer, and features modular construction for easy maintenance and integration.
The G Feeding Screw Pump for Filter Presses is designed to provide reliable and efficient slurry feeding, with specifications optimized for heavy-duty and continuous operation:
| Parameter | Specification |
Pump Type | Single-screw, positive displacement |
Material | 316L Stainless Steel, Duplex, or abrasion-resistant alloys |
Flow Rate | 1 – 150 m3/h (depending on pump size) |
Maximum Pressure | ≤ 2 MPa (20 bar) |
Maximum Temperature | -20°C – 120°C (optional high-temperature models available) |
Viscosity Range | ≤ 100,000 cP |
Solids Handling | Up to 60% by volume, particle size ≤ 50 mm |
Seal Type | Mechanical seal or seal-less magnetic drive |
Drive Options | Electric, variable frequency drive (VFD), hydraulic, or pneumatic |
Surface Finish | Ra ≤ 0.8 μm for sanitary models |
Cleaning | CIP/SIP compatible for food or pharmaceutical applications |
Flow Direction | Bi-directional capability |
The rotor and stator are designed to ensure smooth, consistent flow into filter press systems, reducing the risk of clogging, pulsation, and shear damage. The pump’s heavy-duty construction ensures long service life even under continuous operation with abrasive slurries.
The G Feeding Screw Pump is widely used in industries requiring reliable filter press feeding and high-viscosity slurry transfer:
Slurry transfer to filter presses: Maintains uniform flow to achieve consistent filter cakes.
Ore and tailings handling: Handles abrasive solids and high-viscosity slurries.
Dewatering processes: Efficient pumping for thickened tailings and sludge.
Slurries with high solids content: Provides consistent feed for chemical filtration.
Resins, polymers, and coating pastes: Smooth transfer reduces pulsation and shear damage.
Corrosive chemicals: Resistant materials allow safe handling of acidic or alkaline slurries.
Activated sludge feeding: Smooth, uniform feeding into filter presses.
Industrial effluent handling: Reduces risk of clogging with high-solid-content fluids.
Sludge dewatering: Ensures high efficiency and uniform cake formation.
High-viscosity syrups or pastes: Maintains uniform feeding for filtration or clarification processes.
Fruit and vegetable pulps: Smooth pumping without damaging sensitive materials.
Dairy or chocolate processing: Ensures consistent feed to filtration units.
Paper and pulp processing: Handles pulp suspensions with high solids.
Ceramics and refractory materials: Pumps thick slurries for filtration or dewatering.
Environmental engineering: Feeding of sludge into filtration systems for water treatment.
To ensure optimal operation and long service life, follow these guidelines:
Mounting: Install the pump on a stable, vibration-free foundation. Horizontal installation is preferred.
Connections: Use appropriate flanges or sanitary fittings for inlet and outlet connections.
Drive Alignment: Ensure precise alignment of the motor or drive system to avoid wear.
Priming: Fill the pump cavity with fluid before start-up, especially for viscous slurries.
Start-Up: Begin at low speed to gently prime the pump.
Flow Control: Use VFD or manual speed adjustment to achieve the desired flow rate.
Monitoring: Check for unusual noise, vibration, or temperature rises during operation.
Filter Press Feeding: Adjust flow to match the filter press cycle, ensuring uniform cake formation.
Cleaning: For food or pharmaceutical applications, conduct CIP/SIP cleaning; flush abrasive slurries after use to prevent wear.
Routine Inspection: Check rotor, stator, seals, bearings, and drive units for wear.
Lubrication: Ensure proper lubrication of the drive system and bearings.
Replacement Parts: Use OEM-certified rotors, stators, and seals for consistent performance.
Preventive Maintenance: Schedule regular inspections to reduce downtime and extend pump life.
The pump handles high-viscosity slurries, solids-laden fluids, shear-sensitive pastes, and industrial effluents, ensuring smooth feeding into filter presses.
Yes, models constructed with abrasion-resistant alloys or stainless steel can handle slurries with high solid content and abrasive particles.
It provides continuous, pulsation-free feeding, ensuring uniform filter cake formation, reducing downtime, and improving dewatering efficiency.
Yes, standard pumps handle -20°C to 120°C, with optional high-temperature designs available.
Yes, hygienic models for food and pharmaceutical applications are fully compatible with CIP/SIP cleaning.
Dry running is not recommended. Pre-filling or low-speed priming is necessary for viscous slurries.
Maintain proper NPSH, avoid air pockets, and operate within the recommended flow range.
Yes, with a VFD or variable-speed drive, the pump provides accurate feed rates to match filter press cycles.
Continuous Feeding: Ensures uniform slurry flow into filter presses for consistent cake formation.
Handles Viscous and Abrasive Slurries: Efficient transfer of high-solid-content fluids.
Durable Construction: Stainless steel or abrasion-resistant alloys resist wear and corrosion.
Pulsation-Free Flow: Rotor-stator design reduces shear and protects material integrity.
Hygienic Options: CIP/SIP compatible for food and pharmaceutical applications.
Versatile Drives: Electric, VFD, pneumatic, or hydraulic drives for flexible operation.
Easy Maintenance: Modular design allows quick inspection and part replacement.
Bi-Directional Flow: Flexible installation and process integration.
The G Feeding Screw Pump for Filter Presses is a high-performance, reliable solution for feeding slurries, high-viscosity fluids, and solids-laden materials into filter press systems. Its rotor-stator design and durable construction ensure continuous, pulsation-free, and precise feeding, improving filtration efficiency, reducing downtime, and protecting material integrity.
Ideal for mining, chemical, wastewater, food, and industrial applications, this pump offers versatility, durability, and hygienic compliance. Its modular design, CIP/SIP capability, and ability to handle abrasive, viscous, or shear-sensitive fluids make it a trusted choice for engineers, plant managers, and quality assurance teams.
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