Stable melt pressure and clean polymer flow are critical in extrusion. Without proper melt pumping and filtration, film, sheet, pipe, profile, and recycling lines can struggle with pressure surges, gels, black specks, screen-change downtime, dimensional variation, and rising energy cost. Our MAAG extrusion melt pump, screen changer, and polymer filtration systems help stabilize output, improve melt quality, reduce scrap, and protect downstream equipment.
Gauge Advisor is the official sales partner for MAAG , a global manufacturer of extrusion filtration systems, gear pumps, and pelletizing solutions. Together we provide melt pumps and screen changers engineered for consistent pressure, reduced downtime, and efficient resin processing across extrusion and compounding lines.
Tell us your polymer type, throughput, and process requirements and we will recommend the right melt pump, screen changer, or filtration system. We will include pricing, lead times, and installation guidance. Need help sizing the pump or selecting the right filter? We can do that too.
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Stabilize melt pressure and eliminate pulsation at the die to improve thickness uniformity and reduce material waste. Precision gear pumps enable tighter gauge control and higher line speeds in film and sheet extrusion.
Maintain continuous production with screen changes under pressure. Continuous filtration systems remove contamination without interrupting flow, ensuring stable melt pressure and consistent product quality.
Process filled or contaminated materials without screen clogging or frequent changeovers. Advanced melt filtration systems remove gels, black specks, and fines while maintaining throughput and product quality.
Integrate pump speed, pressure control, and temperature monitoring into your extrusion line. Advanced control systems improve process stability, enable faster startups, and provide real-time production visibility.
Feed multiple dies or layers with consistent, independent melt streams. Ideal for coextrusion and multilayer film structures where uniform flow distribution is critical to product performance.
Implement fully integrated melt delivery systems including pumps, filtration, drives, and support structures. Designed for easy installation, retrofit flexibility, and optimized extrusion performance.
Deliver stable melt pressure at the die to maintain consistent OD, wall thickness, and tight dimensional tolerances. High-pressure gear pumps reduce pulsation and enable tighter process control in pipe, profile, and tubing extrusion.
Maintain consistent flow and pressure during screen changes without interrupting production. Continuous screen changers prevent pressure spikes that can impact part geometry and surface quality.
Process filled compounds and controlled regrind streams without compromising product quality. Advanced filtration removes gels and contaminants while maintaining throughput and protecting downstream equipment.
Engineered specifically for rigid PVC processing, these systems reduce temperature rise, minimize pulsation, and relieve load on the extruder. Ideal for pipe, profile, and window extrusion applications.
Distribute melt flow to multiple dies or downstream processes with consistent pressure and independent control. Ideal for profile extrusion and systems requiring multiple outputs from a single extruder.
Upgrade existing extrusion lines with fully integrated melt delivery systems including pumps, filtration, drives, and support structures. Improve process stability, reduce scrap, and simplify installation.
Stabilize melt pressure and flow when processing regrind, flakes, and recycled materials. Melt pumps reduce pulsation, improve consistency, and allow higher throughput even with variable material quality.
Maintain continuous production while filtering contaminants from recycled material streams. Designed for continuous operation in applications with controlled or moderate contamination levels, reducing pressure fluctuations and downtime.
Process heavily contaminated materials with advanced filtration designed for recycling applications. Remove particles, gels, and debris while maintaining throughput and protecting downstream equipment.
Monitor and control pressure, temperature, and pump performance in real time. Improve process stability and reduce variability when working with inconsistent recycled materials.
Split and control melt flow across multiple downstream processes. Useful in recycling lines feeding different extrusion outputs or managing variable material streams.
Integrate pumps, filtration, controls, and support systems into a complete melt delivery solution. Designed for high contamination environments and optimized for reliability, high throughput, and ease of retrofit.
Remove gels, fines, and metal contaminants without choking your extruder
Maintain clean flow and consistent pressure for regrind-heavy formulations
Extend run time and reduce consumable screen changes on reclaim lines
Stabilize melt pressure for ultra-consistent wall thickness and concentricity
Ensure product quality with continuous filtration and pressure control
Reduce shear and avoid degradation by removing particulates before the die
Prevent gauge variation from surging pressure or contamination
Stabilize melt streams across layers to avoid interfacial distortion
Keep density and profile shape stable by eliminating melt fluctuations
Achieve repeatable OD/ID and reduce scrap in high-tolerance profiles
Run long shifts without stopping for screen changes or cleaning
Avoid defects caused by gels, streaks, and inconsistent melt flow
Boost output up to 50% without overdriving the extruder
Reduce mechanical wear and energy consumption by offloading pressure generation
Stop chasing gauge, cutbacks, or haze from pressure swings
Melt pumps, screen changers, and melt filtration systems are not one-size-fits-all. The best solution depends on the application, contamination level, material consistency, throughput target, pressure requirements, and whether the process is running clean virgin resin, filled compounds, PVC, regrind, or heavily contaminated recycled material.
Not sure which melt pump or filtration system is right for your application? Use these interactive tools to estimate the best starting point based on your material, throughput, contamination level, and process conditions.
Melt pumps are used when the process needs more stable pressure, reduced pulsation, better dimensional control, higher throughput, or lower temperature rise through the extruder.
| Film & Sheet | Use melt pumps to improve gauge consistency, reduce die pulsation, and support higher throughput with tighter thickness control. |
| Pipe, Tube & Profile | Use melt pumps when OD, ID, wall thickness, and dimensional stability are critical, especially in PVC and high-pressure applications. |
| Recycling & Regrind | Use melt pumps to stabilize pressure and flow when processing variable recycled streams, filled blends, and reclaimed materials. |
Filtration strategy depends primarily on contamination level, material cleanliness, filler content, and whether the process can tolerate manual intervention or requires continuous operation.
| Low Contamination | Manual or simpler screen changers can be suitable for cleaner materials, lower throughput lines, or cost-sensitive applications. |
| Moderate Contamination | Continuous screen changers and systems like BRF fit applications requiring better uptime, more stable pressure, and improved handling of fillers or contamination. |
| High Contamination | Self-cleaning high-performance melt filters such as ERF and ECO are typically the best fit for recycling, post-consumer streams, and heavily contaminated materials. |
Melt pumps and filtration systems are selected based on pressure requirements, contamination level, material type, and throughput targets. Below is a general guideline based on common extrusion applications:
See solutions for melt filtration, gear pump systems, and continuous screen changers for high-quality polymer processing and recycling.
Extrusion Pressure Stability & Melt Quality
Stable melt pressure and clean polymer flow are critical for consistent extrusion. Without the right melt pump, screen changer, or polymer filtration system, film, sheet, pipe, profile, compounding, and recycling lines can struggle with pressure surges, gels, black specks, dimensional variation, rising scrap, and screen-change downtime.
In many extrusion processes, the extruder is responsible for both melting the polymer and generating pressure. This can create pressure fluctuation, especially when running reclaimed material, filled compounds, higher throughput rates, or polymers with changing viscosity.
An extrusion melt pump helps decouple these functions. The extruder focuses on melting and mixing, while the gear pump meters the melt more precisely to the die. This creates a more stable, repeatable, and controllable extrusion process.
Polymer filtration systems and screen changers work alongside melt pumps by removing contamination before it reaches the die. This is especially important when processing recycled materials, regrind, filled compounds, or contamination-sensitive products where gels, black specks, and degraded material can affect product quality.
In higher contamination environments, continuous screen changers and advanced melt filtration systems can help maintain polymer flow during filtration changes, reducing downtime, protecting downstream equipment, and improving extrusion uptime.
Extrusion Melt Pump & Filtration FAQ
Common questions about extrusion melt pumps, screen changers, polymer melt filtration, pressure stabilization, and contamination control for film, sheet, pipe, profile, compounding, and recycling lines.
A melt pump is a precision gear pump installed between the extruder and the die. It stabilizes melt pressure and meters polymer flow more consistently than an extruder alone. This improves dimensional stability, reduces scrap, and can help the line run at higher usable output.
Melt pumps are typically installed when extrusion lines experience pressure fluctuation, dimensional variation, unstable die flow, or limited throughput. They are common in film, sheet, pipe, tubing, profile, compounding, and recycling processes where stable melt pressure is critical.
The extruder is best used to melt and mix the polymer, while the melt pump is better suited for generating stable, controlled pressure at the die. By decoupling melting from pressure generation, the process can become more stable, repeatable, and easier to control.
Screen changers hold filtration screens that remove contaminants from the polymer melt stream. Melt filtration systems may include more advanced filtration technologies designed for high-contamination streams, recycling applications, filled compounds, or sensitive polymers where long screen life and stable pressure are important.
A continuous screen changer is useful when the line cannot afford interruptions during screen changes or when contamination causes frequent screen loading. Continuous screen changers help maintain polymer flow during filtration changes, reducing downtime and pressure disturbance.
Screen changers and melt filtration systems remove unwanted particles from the polymer melt before the material reaches the die. This can help reduce black specks, gels, unmelted material, degraded polymer, paper, wood, metal, or other contaminants depending on the material stream and filter technology.
In many cases, yes. Because the melt pump generates pressure more efficiently and consistently than the extruder, processors can sometimes increase line speed while maintaining stable melt pressure and product quality. The actual gain depends on the material, die, extruder, cooling capacity, downstream limits, and current pressure stability.
Recycled, regrind, or highly contaminated polymer streams often need more robust filtration than a simple manual screen changer. The right choice depends on contaminant type, contaminant loading, allowable pressure variation, throughput target, screen-change frequency, and whether the process can tolerate interruptions.
Selection depends on polymer type, contamination level, throughput target, melt pressure requirements, temperature, viscosity, die requirements, and available installation space. Many processors start by estimating potential improvements using tools like the filtration and melt pump ROI calculator.
Share your polymer, throughput, and contamination level and we will recommend the correct MAAG melt pump or screen changer for your process. We will include pricing, lead times, and installation guidance.
Prefer to start with a quick estimate? Use the melt pump sizing tool or the filtration & screen changer selector to narrow the right system based on your process inputs.
Request a RecommendationWe help extrusion teams improve melt stability, reduce scrap, and choose the right pump and filtration approach for the process, not just the catalog.
