Carcasa de membrana FRP

FRP (Fiberglass Reinforced Plastic) membrane housing is a high-strength, corrosion-resistant pressure vessel engineered to hold reverse osmosis (RO) and nanofiltration membranes inside water treatment systems. It works by containing the membrane elements under pressure so that feed water can pass through, separating purified permeate from concentrated reject water.

Thanks to its composite fiberglass construction, FRP housing delivers the strength of metal without the risk of rust, making it ideal for desalination, industrial filtration, and high-purity water applications.

• Superior corrosion resistance — won’t rust, even in seawater or chemically aggressive environments.
• Lightweight — up to 70% lighter than steel, reducing shipping, handling, and installation costs.
• Longer service life — no galvanic corrosion or pitting over time.
• High pressure rating — engineered to handle demanding RO system pressures.
• Lower total cost of ownership — less maintenance and fewer replacements compared to metal housings.

Pullner FRP membrane housings are compatible with all standard industrial membrane configurations, including:

• Spiral wound RO membranes
• Nanofiltration (NF) membranes
• Ultrafiltration (UF) membranes
• Hollow fiber membranes
• Flat sheet membranes

We support 2.5″, 4″, and 8″ diameter elements, as well as custom configurations on request.

Pullner FRP membrane housings are available in multiple pressure ratings to match your system requirements, typically including 150 PSI, 300 PSI, 450 PSI, 600 PSI, 1000 PSI, and 1200 PSI options.

The right pressure rating depends on your membrane type, feed water source, and operating conditions. For seawater desalination and high-recovery industrial systems, higher-rated vessels are recommended. Contact our team for help matching the correct pressure class to your application.

FRP membrane housings are widely used across industries that rely on membrane-based water treatment, including:

• Seawater and brackish water desalination
• Municipal drinking water treatment
• Industrial process water and wastewater recycling
• Producción de alimentos y bebidas
• Pharmaceutical and biotech manufacturing
• Power generation and boiler feed water
• Chemical processing and electronics (ultrapure water)

Yes. Pullner FRP membrane housings are specifically engineered for high-pressure reverse osmosis and nanofiltration applications. The filament-wound fiberglass construction provides exceptional burst strength, allowing reliable operation in demanding systems such as seawater desalination plants, zero liquid discharge (ZLD) setups, and industrial concentrate recovery.

Every vessel is pressure-tested to ensure safe, long-term performance under continuous operating loads.

To select the correct housing, consider the following factors:

1. Membrane size — match the vessel diameter and length to your membrane elements (e.g., 4″ or 8″).
2. Number of elements — FRP vessels are available in 1, 2, 3, 4, 5, 6, 7, and 8-element configurations.
3. Operating pressure — choose a pressure rating that comfortably exceeds your maximum system pressure.
4. Port configuration — side-port or end-port options depending on your plumbing layout.
5. Feed water type — seawater, brackish, or industrial wastewater may require different seals and coatings.

Our engineering team is happy to recommend the ideal housing based on your project specs.

FRP housings require minimal maintenance compared to metal alternatives, but regular inspection ensures long service life:

• Periodically check end caps, O-rings, and seals for wear or leaks.
• Inspect the exterior for cracks, abrasions, or UV damage (especially for outdoor installations).
• Clean and flush membranes on the manufacturer’s recommended schedule.
• Verify that mounting clamps and supports remain secure.
• Replace worn seals and retaining rings as needed during membrane changeouts.

With proper care, Pullner FRP housings can provide 10+ years of reliable service.

Yes. Pullner offers fully customizable FRP membrane housings to meet unique project requirements. Customization options include:

• Custom diameters and lengths
• Tailored pressure ratings
• Side-port or end-port configurations
• Custom port sizes and thread types (NPT, Victaulic, flanged)
• Specialized coatings and colors
• OEM branding and private labeling

Contact our sales team with your specifications and we’ll provide a tailored solution.

A properly installed and maintained Pullner FRP membrane housing typically lasts 10 to 15 years or more, significantly outlasting stainless steel housings in corrosive environments. Actual service life depends on:

• Operating pressure and pressure cycling frequency
• Feed water chemistry and temperature
• Installation environment (indoor vs. outdoor, UV exposure)
• Quality of routine maintenance and seal replacement

Our vessels are manufactured with premium epoxy resin and filament-wound fiberglass for maximum durability.