FRP Pressure Vessels

FRP Pressure Vessels provide a strong, corrosion-resistant enclosure for filter media, activated carbon, ion-exchange resins and other water-treatment media operating under pressure.

The vessel typically combines a corrosion-resistant inner liner with an external fibreglass-reinforced structural layer, providing mechanical strength without the weight and corrosion concerns associated with conventional metallic tanks.

Hydroxy supplies FRP vessels in different diameters, heights, capacities, pressure ratings and connection configurations according to treatment capacity and application.

Typical applications include sand filtration, multimedia filtration, activated-carbon filtration, iron removal, water softening, demineralisation and specialised media treatment.

FRP vessels combine structural strength with high resistance to water and many treatment environments, making them suitable for a wide range of pressurised treatment processes. Key advantages include:

Corrosion-Resistant Construction
Lightweight Compared With Metal Vessels
High Strength-to-Weight Ratio
Suitable for Different Filter Media
Compatible With Automatic Control Valves
Multiple Vessel Sizes
Different Port Configurations
Easy Installation & Handling
Low Routine Structural Maintenance
Residential to Industrial Applications
Suitable for Filtration & Ion Exchange

Large composite vessels are also used internationally for commercial and industrial treatment where corrosion resistance and reduced maintenance are important.

Key Selection Parameters

FRP pressure vessels should be selected according to the treatment process, media quantity, operating pressure and required flow rate. Typical specification parameters include:

Vessel Diameter
Vessel Height
Internal Volume
Media Capacity
Maximum Working Pressure
Operating Temperature
Inner Liner Material
FRP / Composite Construction
Resin Type
Top Opening Size
Bottom Opening Size
Side-Port Requirement
Control-Valve Compatibility
Distributor Configuration
Required Service Flow
Backwash Flow Requirement
Installation Orientation
Intended Treatment Application

Construction Options

Depending on the vessel and application, constructions can include:

Polyester FRP: Suitable for standard water-treatment duties.

Vinylester FRP: Selected where higher temperature or greater chemical resistance is required.

Products

Residential & Light Commercial FRP Vessels

Compact composite vessels for everyday water-treatment applications.

These vessels are designed for smaller filtration and softening systems where compact size, corrosion resistance and easy handling are important. They can accommodate a range of treatment media and automatic or manual control valves.

Typical Applications:

Residential water softeners, activated-carbon filters, pressure sand filters, iron-removal filters and light-commercial filtration systems.

Commercial & Industrial FRP Vessels

Higher-capacity vessels for demanding water-treatment systems.

Commercial and industrial vessels provide greater media capacity and flow capability for larger treatment plants. They can be configured with suitable top, bottom or side connections depending on distributor design, service flow and backwashing requirements.

Typical Applications:

Commercial water treatment, hotels, hospitals, industrial pretreatment, central filtration systems and process-water plants.

FRP Filter Media Vessels

Versatile vessels for pressurised media filtration.

Filter-media vessels are designed to contain graded sand, multimedia, specialised filtration media or other granular treatment materials. The internal distributor system allows water to pass uniformly through the media during service and supports reverse flow during backwashing.

Typical Applications:

Pressure sand filtration, multimedia filtration, turbidity reduction, suspended-solids removal and water-treatment pretreatment.

FRP Activated Carbon Vessels

Corrosion-resistant vessels for carbon adsorption systems.

These vessels are configured to contain granular activated carbon used for chlorine, taste, odour, colour and selected organic-contaminant reduction. Correct vessel size is selected according to flow rate, carbon volume and required contact time.

Typical Applications:

RO pretreatment, drinking-water treatment, commercial filtration, process-water purification and water polishing.

FRP Water Softener Vessels

Pressure vessels designed for ion-exchange softening media.

Softener vessels contain cation-exchange resin and provide the pressure enclosure required for service, backwash, regeneration and rinse cycles. They can be integrated with manual or automatic multiport control valves.

Typical Applications:

Residential softening, commercial water softeners, boiler-feed pretreatment, cooling-water treatment and industrial hardness reduction.

FRP Ion Exchange & DM Vessels

Composite vessels for demineralisation and ionic contaminant removal.

FRP ion-exchange vessels can contain cation, anion or specialised resins used for removal of dissolved ionic contaminants. Appropriate vessel and internal configuration are selected according to resin volume, regeneration method and treated-water requirement.

Typical Applications:

Demineralisation plants, deionisation systems, process water, boiler make-up water and industrial high-purity water pretreatment.

Chemical-Resistant / Vinylester FRP Vessels

Enhanced material construction for more demanding operating conditions.

Vinylester-based FRP vessels provide increased chemical and temperature resistance compared with standard polyester constructions where the operating environment requires it.

Typical Applications:

Selected industrial water-treatment processes, deionisation, chemical-treatment systems and higher-temperature water applications.

FRP Retention & Contact Vessels

Pressurised vessels designed to provide controlled treatment contact time.

Retention vessels provide additional volume for chemical reactions or oxidation processes to occur before water proceeds to the next treatment stage. They can be integrated with suitable inlet, outlet and drain arrangements.

Typical Applications:

Oxidation, chlorination contact, iron treatment and selected chemical-conditioning processes.

Low-Profile FRP Pressure Vessels

Compact vessel configurations for installations with limited height.

Low-profile vessels maintain useful media capacity while reducing overall installation height, making them suitable where plant-room clearance is restricted.

Typical Applications:

Commercial filtration rooms, retrofit projects, packaged water-treatment systems and installations with limited vertical space.

FRP Membrane Pressure Vessels

Composite housings for RO and membrane-treatment elements.

FRP membrane pressure vessels are designed to contain spiral-wound membrane elements under the operating pressure required for membrane separation.
Depending on the application, vessels can be supplied in different diameters, pressure ratings and end-entry or side-entry configurations.

Typical Applications:

Brackish-water RO, seawater RO, commercial RO, industrial desalination and high-pressure membrane systems.