INDUSTRY SOLUTIONS . FBE DESALINATION & WATER

FBE Coated Ball Valves for Desalination & Water Treatment

Fusion bonded epoxy coated ball valves for SWRO and MSF desalination plants, water transmission mains, wastewater treatment and coastal power plant cooling systems - coating, materials and testing specified for chloride-rich water service.

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Technical FAQ

API 6D

API 607 / ISO 10497 fire-safe

ISO 15848-1 low emission

NACE MR0175

ISO 9001 / 14001 / 45001

EN 10204 3.1

250-500 µm

FBE coating thickness

DN50-DN1400

Size range 2"-56"

Class 150-2500

PN10-PN420

45,000 mg/L

Chloride levels handled

2 plants

Wenzhou, China since 2018

API 6D

Design & testing standard

Home index fbe-valves-desalination-water

FBE Desalination & Water

Fighting Seawater Corrosion Outside and Inside

J-VALVES manufactures FBE coated ball valves for seawater desalination (SWRO / MSF), water treatment plants, water transmission pipelines and power plant cooling systems - floating, trunnion and fully welded types from DN50 to DN1400 (2"-56"), Class 150 to 2500, with fusion bonded epoxy coating from 250 to 500 microns.

Seawater is one of the most corrosive services a valve can face. Our FBE ball valves combine an electrostatically applied, heat-cured epoxy layer over carbon steel bodies with corrosion-resistant trims - super duplex, duplex, stainless steel or nickel-aluminum bronze - so the valve fights corrosion from outside and inside at the same time.

Because coating quality decides service life in water projects, we treat coating as an engineered process with measurable acceptance criteria: surface preparation, anchor profile, dry film thickness, holiday (spark) testing and adhesion testing are recorded for every coated batch and included in the documentation package.

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FBE coated ball valves inspected before dispatch

Fully welded FBE ball valves for water transmission

GLOBAL MARKET ACCESS

Can You Sell Our Valves in Your Market?

Market access is a commercial question, not a technical footnote. This is how we support the compliance route for the main destination markets - confirm your market and application with us and we will state in writing exactly which certificates apply.

Target market	What your market usually requires	What J-VALVES provides	Evidence in the documentation package
European Union	CE marking under the Pressure Equipment Directive, material certificates to EN 10204, technical file	CE / PED conforming valves, EU-format material certificates, declaration of conformity and technical file support	CE declaration of conformity, EN 10204 3.1 certificates, pressure test records
United Kingdom	UKCA marking as the post-Brexit route for pressure equipment	UKCA-aligned marking and documentation support where both UK and EU markets are served	UKCA declaration and supporting technical documentation
North America (US / Canada)	API product standards, ASME B16.34 design, CRN registration in some Canadian provinces	API 6D, API 608, API 600 and API 602 products, ASME-compliant design, CRN documentation support	API certification records, ASME design data, CRN submission support
Gulf and Middle East	API-certified products, operator vendor listing, SASO / G-mark where applicable	API certified products, vendor-listing support, NACE MR0175 sour service materials, third-party inspection	API certificates, NACE material records, TPI reports
Russia and CIS	EAC / TR CU conformity for customs union entry	EAC conforming products and documentation for the customs union market	EAC certificates and technical passports
Latin America	Local conformity where regulated (for example INMETRO in Brazil), plus full project documentation	Project documentation packages, third-party inspection coordination, translated labelling on request	Conformity support documentation, TPI reports, translated labels
Australia and Asia-Pacific	Project specifications, water authority approvals for potable service, AS alignment	AS-aligned design review, potable-water material options, complete project documentation	Material and coating certificates, potable-water compliant material records

Certification scope varies by product, size and market. We confirm in writing which certificates apply to your specific product and destination before you order - we never assume an approval covers a product it does not.

SELECTION GUIDE

Desalination & Water Valve Selection Matrix

Valve and coating selection by plant area - the table our engineers use when reviewing a desalination or water project valve list.

Plant area / service	Recommended valve	Body / trim material	Coating & standard
Seawater intake, screening & outfall	Trunnion or floating, full port	Carbon steel body, super duplex 2507 trim, NAB C95800 option	FBE 400-500 µm + topcoat, ISO 21809-2 / AWWA C213
Pretreatment, filtration & backwash	Floating, full port	Carbon steel, SS316 / duplex trim, PTFE seat	FBE 350-400 µm, holiday tested
High-pressure RO membrane feed (60-80 bar)	Trunnion, metal or reinforced PTFE seat	Super duplex 2507 or 254 SMO body option	FBE + splash-zone topcoat
Brine / concentrate outfall	Trunnion, hardened trim	Super duplex 2507, 254 SMO, Ni-based overlay	Heavy-duty FBE 500 µm, abrasion resistant
Permeate / product water	Floating, potable-water configuration	Carbon steel or SS316, PTFE seat	FBE or cement lining per specification
Chemical dosing (acid / alkali)	Floating or trunnion	Carbon steel with PTFE, PP or rubber lining	Lined or FBE, material compatibility checked
Power plant cooling & circulating water	Trunnion or fully welded, large bore	Carbon steel, duplex / NAB trim	FBE 500 µm, DFT and holiday tested

Applications

FBE Ball Valve Applications in Water Projects

Chloride 19,000-45,000 mg/L · continuous duty

SWRO Desalination Plants

FBE coated ball valves for seawater intake, screening, pretreatment filtration and outfall lines. Carbon steel bodies carry a 300-500 micron fusion bonded epoxy layer, while wetted parts use duplex or super duplex trims to resist crevice and pitting corrosion in high-chloride seawater.

Full-port design to limit flow velocity and erosion

Duplex 2205 / super duplex 2507 internals

FBE 400-500 µm with holiday test

Valve position marking and lockable handles for plant safety

60-160 bar · high salinity

High-Pressure RO Membrane Lines

For membrane feed and high-pressure loops, trunnion ball valves with reinforced coatings and duplex or nickel-alloy internals handle continuous duty at high salinity and pressure. Seat designs are selected for tight shutoff after repeated pressure cycling, and torque is measured so actuator sizing is based on data.

Trunnion mounted, Class 300-900

Super duplex 2507 or 254 SMO internals

Reinforced PTFE or metal seat

Torque measured at operating differential pressure

Buried · soil stress · cathodic protection

Water Transmission & Buried Pipelines

Fully welded and trunnion FBE ball valves for buried transmission mains. The coating resists soil stress and cathodic disbondment, while fully welded bodies remove bolted joints from the pressure boundary so there are no flanges to leak or corrode along the line.

Fully welded body, 2"-56"

FBE per ISO 21809-2 / CSA Z245.20

Cathodic disbondment tested for buried service

Weld-end preparation matched to line pipe

Potable & process water

Water & Wastewater Treatment Plants

Floating ball valves in FBE-coated and stainless executions for dosing, filtration, backwash and sludge lines. Seats and coatings are selected for potable water compatibility where the project requires drinking-water approvals, and EPDM seats are standard for treated water service.

DN15-DN300 floating valves

PTFE seats, potable-water grades on request

FBE or stainless body options

Manual, pneumatic or electric actuation

Seawater · large bore · 24/7 duty

Power Plant Cooling & Circulating Water

FBE coated large-bore ball valves for cooling water intake and circulating systems at coastal power plants. Direct seawater exposure is handled by the coating system on the outside and corrosion-resistant internals on the wetted side, with DFT and holiday test records supplied for the plant's coating register.

Large bore up to DN1400 (56")

FBE 500 µm heavy-duty system

Duplex / NAB trims for seawater

Coating test records for maintenance planning

Package supply · ITP · TPI

Desalination EPC Valve Packages

Valve packages for desalination and water EPC contractors: one consistent coating specification across the whole order, ITP with hold points, third-party inspection coordination and export packing to site. Package supply avoids the common problem of mixed coatings from multiple vendors on one plant.

Single coating specification across the package

ITP, MTC and coating reports per valve

Third-party inspection coordinated in our plant

Seaworthy packing with project marking

Engineering

Why Fusion Bonded Epoxy Decides Valve Life in Water Service

Coating Process and Thickness

Blast-cleaned surfaces receive electrostatically applied epoxy powder, cured at controlled temperature into a seamless 250-500 micron layer - full coverage including body cavities, bolting areas and weld ends, with no brush marks or weak edges.

Coating Systems Matched to Exposure

Single-layer FBE for buried lines, FBE plus topcoat for splash zone and UV exposure, and heavier multi-layer systems for aggressive intake structures - selected against the actual exposure, not a default specification.

Outside Coating, Inside Materials

Coating protects the outside; trim selection protects the inside. Super duplex, duplex, 316L and nickel-aluminum bronze internals with EPDM or PTFE seats give balanced corrosion resistance across intake, brine and product water lines.

Technical Detail

FBE Coating Specification We Work To

Coating is the part of a water valve that usually fails first - so it is specified, measured and documented rather than described in general terms.

Item	What we do
Surface preparation	Blast cleaning to Sa 2 1/2 (ISO 8501-1) / SSPC-SP10, salt contamination checked on immersion service
Anchor profile	40-100 µm profile, measured per batch to secure mechanical adhesion of the epoxy layer
Coating application	Electrostatic spray of fusion bonded epoxy powder, heat cured; single layer for buried service, FBE plus topcoat for splash zone and UV exposure
Dry film thickness (DFT)	250-500 µm depending on service; typical 350-450 µm for seawater immersion, measured at multiple points per valve
Holiday (spark) test	100% of coated surface inspected at 1,500-2,500 V to detect pinholes and thin spots before assembly
Adhesion test	Pull-off adhesion test on batch coupons; acceptance criteria agreed per project specification
Cathodic disbondment	Tested for immersion and buried service per ISO 15711 / CSA Z245.20 where specified
Repair & touch-up	Approved two-component repair material at weld ends, bolting areas and mechanical damage, with repair records attached

Coating standards referenced: ISO 21809-2 (pipeline coatings), AWWA C213 (fusion bonded epoxy for waterworks), CSA Z245.20 / Z245.21, ISO 15711 (cathodic disbondment in seawater), ISO 8501-1 and SSPC-SP10 / NACE No. 2 for surface preparation.

Project Experience

Water & Desalination Project Experience

Reference cases below follow the structure we use in project records - service, challenge, technical solution and verified outcome. Replace with your current project data before publishing.

SWRO · FBE coated · Duplex trim

FBE coated ball valves for a seawater desalination intake and outfall package

Challenge

Class 2500 pressure rating combined with low ambient temperature, sour service material control and third-party witnessed testing.

Solution

Forged LF2 body and trunnion, NACE MR0175 hardness control on welds and trim, tungsten carbide coated ball and seat, anti-blowout stem, hydrostatic shell test at 1.5x rated pressure and seat test at 1.1x.

Result

Witnessed tests passed at first submission; valves shipped with EN 10204 3.1 certificates, PMI and hardness reports, and full dimensional records.

Buried main · Fully welded · FBE

Fully welded FBE ball valves for a buried water transmission main

Challenge

Zero tolerance for leakage along a buried main where excavation for repair is extremely costly, plus soil stress and cathodic protection interaction on the coating.

Solution

Fully welded body construction eliminating flange joints, FBE coating per pipeline coating practice with cathodic disbondment testing, weld-end preparation matched to the line pipe, and 100% holiday testing before dispatch.

Result

Installed without field welding problems and accepted by the contractor's coating inspector at first inspection.

Power plant · DN1400 · Seawater cooling

Large-bore FBE ball valves for a coastal power plant cooling water system

Challenge

Large-bore valves exposed to raw seawater with sand content, requiring coating durability and erosion-resistant sealing surfaces.

Solution

DN1400 trunnion ball valves with 500 µm heavy-duty FBE system, duplex and nickel-aluminum bronze trims, hardened seat surfaces for sand-laden water, and hydraulic test plus coating inspection documented for the plant maintenance register.

Result

Accepted after witnessed pressure and coating testing; coating records allow the plant to plan inspection intervals from measured DFT data.

Risk Control

Water Service Failure Modes and Our Countermeasures

Failure mode	Root cause	J-VALVES countermeasure
Coating disbondment at edges and holidays	Thin or damaged coating at edges, weld ends and bolting areas allows chloride attack under the film	100% holiday (spark) test, DFT measurement at multiple points, edge-strip procedures and approved repair material with recorded touch-up
Crevice corrosion under gaskets and bolting	Stagnant seawater in flange gaps and bolt holes accelerates localized corrosion	Coated and sealed bolting areas, duplex or NAB trims in crevice-prone zones, and design review of flange interfaces during specification review
Erosion of ball and seat by sand	Sand and suspended solids at high velocity across the sealing surface	Full-port design to reduce velocity, hardened or overlay-protected ball and seat, and velocity guidance supplied with the quotation
Seat leakage after pressure cycling	Seat deformation from repeated pressure swings and thermal movement in long lines	Reinforced PTFE or metal seat options, spring-energized seat loading, and seat test at 1.1x rated pressure before dispatch
Galvanic corrosion between carbon steel body and stainless trim	Direct metal contact between dissimilar materials in a conductive medium	Material pairing review, insulation and coating at the interface, and selection of compatible trim materials for the specific water chemistry
Biofouling and blocked operation	Marine growth and deposits restricting ball movement in intake and outfall lines	Full-port design, smooth coated bore, and operating torque measurement so the installed actuator can overcome expected fouling load

Quality

Testing and Quality Control for Water Service Valves

Coating quality is inspected with the same discipline as pressure containment - both are recorded per valve and included in the delivery documentation.

01 Material & MTC Verification

Chemical composition, mechanical properties and PMI on body and trim materials, with heat-number traceability to EN 10204 3.1 certificates.

02 Surface Preparation Inspection

Blast cleanliness and anchor profile checked before coating - salt contamination tested for immersion service.

03 Coating Application & Curing

Electrostatic FBE application and controlled curing; batch coupons prepared for adhesion and disbondment testing.

04 Film Thickness & Holiday Detection

DFT measurement at multiple points per valve and 100% holiday (spark) test at 1,500-2,500 V to find pinholes and thin areas.

05 Body Strength Test

Hydrostatic shell test at 1.5x rated pressure with digital record, performed after coating on areas that allow it, or before coating with masking as specified.

06 Seat Leakage & Torque Test

Seat test at 1.1x rated pressure, high and low pressure sequence, plus operating torque measurement for actuator sizing records.

07 Adhesion & Peel Test

Pull-off adhesion test on batch coupons; cathodic disbondment testing where immersion or buried service requires it.

08 Final Inspection & Document Package

Final visual and marking inspection, coating repair verification, and compilation of the documentation package including all coating records.

J-VALVES CNC machining workshop for ball valve bodies and balls

CNC machining workshop - ball valve bodies and balls

Fully welded ball valve production line

Hydraulic pressure test bench for valves up to Class 2500

Hydraulic pressure test bench up to Class 2500

Physical and chemical laboratory for PMI and material verification

Physical & chemical laboratory - PMI and material verification

Low voltage wet sponge holiday inspection for fusion bonded epoxy coating on pipeline and ball valve

Wet Sponge Holiday Test for FBE Coating

Standards

Standards and Certificates Behind FBE Water Valves

ISO 21809-2 — Petroleum and natural gas industries - external coatings for buried or submerged pipelines: fusion bonded epoxy coatings.

AWWA C213 — Fusion bonded epoxy coating for the interior and exterior of steel water pipelines - the water industry reference for FBE work.

CSA Z245.20 / Z245.21 — Plant-applied external coatings for steel pipe - adhesion, impact and cathodic disbondment test requirements used on buried service.

ISO 15711 — Determination of resistance to cathodic disbondment of coatings exposed to seawater - relevant for immersion and splash-zone valves.

API 6D / API 608 — Design, testing and marking of pipeline and process ball valves - the base standard for our desalination and water valve range.

ISO 8501-1 / SSPC-SP10— Surface preparation grades - Sa 2 1/2 blasting is the minimum we apply before FBE coating on water service valves.

ISO 9001 / ISO 14001 / ISO 45001 — Quality, environmental and occupational health management systems covering both J-VALVES plants.

Deliverables

Documentation Delivered With Water & Desalination Valve Orders

Coating specification sheet with DFT and test results per valve

Holiday (spark) test and adhesion test records

EN 10204 3.1 material certificates

Hydrostatic shell and seat test reports

Torque measurement record

Cathodic disbondment test report (buried / immersion service)

Dimensional and marking inspection report

ITP with witness and hold points

Operation & maintenance manual with coating repair procedure

Seaworthy packing list

Technical Support

Talk to the Engineer Who Will Specify Your Water Valves

Water and desalination enquiries are handled directly by our project engineer and sales manager. Send your valve list, water chemistry or coating specification and you will receive a technical response covering valve type, materials, coating system and testing scope - usually within 24 hours on working days.

Technical response within 24 hours on working days

Coating system proposed against your water chemistry

Compliance and deviation list before quotation

Drawings for approval in 3-5 working days after order

Third-party inspection and coating witness testing welcomed

Digital coating thickness gauge reading 496 µm on blue epoxy FBE coating of a large water valve during J-VALVES factory QC inspection

FAQ

FBE Desalination & Water Ball Valve FAQ

What is an FBE coated ball valve?

An FBE coated ball valve is coated with fusion bonded epoxy - an electrostatically applied powder that is heat cured into a dense, adherent layer typically 250-500 microns thick. The coating protects carbon steel valve bodies against seawater, brine and soil corrosion, which is why FBE ball valves are standard on desalination plants, water transmission lines and buried pipelines.

Which ball valves fit seawater desalination plants?

Can FBE ball valves be used for buried pipelines and potable water?

What coating thickness do you recommend for seawater service?

How do you test coating quality before delivery?

What materials should be used for high-pressure RO membrane feed lines?

Can you supply a complete valve package for a desalination EPC contractor?

Do you provide coating repair procedures for site work?

Get a Factory Quote

Send your specification, valve list or drawing set - technical proposal and quotation within 24 hours on working days.

Contact J-VALVES

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