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PEK‑S Next-Generation Tubular Membrane Unveiled | A Superior Choice from Plang Membrane for Harsh Operating Conditions
For applications involving high temperatures, strong acids and bases, severe fouling, and intensive cleaning, Pland Membrane has launched the PEK‑S, a next‑generation tubular membrane. This new product delivers enhanced performance in terms of module space efficiency, backwash tolerance, and operational stability across a broad range of temperatures and pH levels, offering a fresh option for industrial water treatment and process‑fluid membrane separation projects.
Plang Membrane has launched the PEK‑S, a next‑generation tubular membrane, expanding the boundaries of membrane separation in demanding operating conditions.
Industrial water treatment and process fluid separation projects are increasingly confronted with more complex influent conditions. Higher temperatures, greater pH fluctuations, heavier pollutant loads, and more frequent or more intensive cleaning requirements all impact membrane module stability, system design, and maintenance strategies. For severe operating conditions that conventional PVDF tubular membranes cannot handle, engineering teams must balance material resistance, component space utilization, and backwash performance—rather than relying on a single parameter when selecting equipment.
Drawing on years of experience in the research, development, and engineering application of tubular membranes, Pulang Membrane is officially launching. PEK-S Next-Generation Tubular Membrane This product features a next-generation proprietary architecture, designed for high-temperature, highly corrosive, heavily contaminated, and intensive cleaning environments, offering a broader range of operating conditions for project design.
What are the key upgrades of the next-generation tubular membrane in the PEK‑S series?
The PEK‑S upgrade is not an isolated adjustment of a single parameter; rather, it is designed to address the real‑world operational requirements of tubular membrane modules under demanding conditions.
Effective membrane area increased by 20% Under the same module outer diameter and length, PEK‑S offers a 20% larger effective membrane area compared to Plum’s previous‑generation module. This comparison applies only to Plum’s prior‑generation module with identical outer dimensions and length and does not imply a 20% improvement across all PVDF products on the market. A larger effective membrane area enables engineering teams to evaluate module and system configurations within a given installation footprint; however, the ultimate processing capacity must still be determined by accounting for design flux, feed‑stream characteristics, and operating conditions.
Tested to withstand a backwash pressure of up to 4 bar. : Under test conditions, PEK‑S can withstand a backwash pressure of up to 4 bar, providing greater flexibility in designing backwash strategies for highly fouled applications that require intensive cleaning. The 4 bar rating refers to the tested backwash‑direction pressure and does not represent the operating filtration pressure nor constitute a guarantee for long‑term continuous operation. Actual backwash pressure, duration, frequency, and cleaning procedures should be determined on a project‑specific basis.
Testing has shown that the maximum tolerable temperature can reach 90°C. For membrane separation applications involving high-temperature feed streams, hot-water cleaning, or temperature fluctuations, thermal stability is a critical selection criterion. A maximum operating temperature of 90°C is specified under test conditions; however, the practical service temperature must be evaluated comprehensively, taking into account the feed composition, contact time, pressure, and operating cycle.
Covers a broader pH range : Testing has shown that PEK‑S is resistant to pH values from 0 to 14 at ambient temperature and to pH values from 0 to 13 at 90°C. These two sets of data correspond to the specified test conditions; the product must not be used outside these temperature ranges, nor should it be interpreted as meaning that the maximum operating temperature, the maximum backwash pressure, and the extreme pH can all be sustained simultaneously over the long term in a single application.
Which operating conditions are PEK‑S best suited to prioritize for assessment?
When the process fluid exhibits strong acidity or alkalinity, operates at elevated temperatures, carries a heavy pollutant load, or when the system requires a more robust backwash and cleaning strategy, PEK‑S should be given priority in the evaluation. It offers a selection guideline tailored to demanding operating conditions, rather than a one-size-fits-all recommendation that disregards the specific fluid and operating parameters.
It is important to emphasize that selecting a tubular membrane involves a systematic engineering process. Factors such as the feed stream composition, solids content, viscosity, temperature, pH, design flux, circulation mode, cleaning chemicals, and operating cycle all influence the final solution. Publicly available parameters can only facilitate an initial assessment; formal selection should still be based on comprehensive process data, with sample testing or pilot-scale trials conducted when necessary to further validate the choice.
Frequently Asked Questions
What is the PEK-S product?
PEK‑S is a next‑generation tubular membrane launched by Planmem, featuring an in‑house‑developed structural design and specifically engineered for high‑temperature, highly acidic/alkaline, heavily fouled, and rigorously cleaned operating conditions. The letters in the product name do not carry any additional technical meaning.
“20% increase in effective membrane area” — compared to whom?
This data was obtained by comparing the component to Plum’s previous-generation model, assuming identical outer diameter and length; it does not represent a comprehensive comparison across all brands or all PVDF tubular membranes.
Is 4 bar the long-term operating pressure of the PEK-S?
No. 4 bar is the maximum backwash pressure rating under test conditions and cannot be directly converted into the filtration operating pressure, the long-term continuous pressure, or the design setpoint.
Can the PEK-S operate continuously under conditions of 90°C, pH 0, and 4 bar?
This conclusion cannot be drawn solely on the basis of publicly available data. The specified test conditions correspond to ambient temperature with a pH range of 0–14, 90°C with a pH range of 0–13, and a backwash pressure of 4 bar. Whether specific items can be used in combination must be confirmed by the technical team in light of the process medium and operating procedures.
What information is required to obtain PEK‑S selection recommendations?
It is recommended to provide information on the medium composition, operating temperature, pH, solids content or viscosity, target throughput, filtration and backwash methods, cleaning chemicals, and cleaning intervals. The more complete the documentation, the more targeted the preliminary equipment selection and testing recommendations will be.
Obtain PEK-S tubular membrane selection recommendations.
If your project is operating under conditions involving high temperatures, strong acids or bases, severe contamination, or intensive cleaning, please submit your process details via the contact form on the Plum website. Our technical team will assess the suitability of PEK‑S based on the specific process media, operating parameters, and system objectives, and provide recommendations for component selection, testing, or pilot‑scale trials.
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