Skip to Content
PEPCON FlexiFit Electrochlorination Configurator - H2O Inc.
PEPCON FlexiFit Electrochlorination Unit

PEPCON FlexiFit Electrochlorination Systems

Our advanced PEPCON FlexiFit seawater electrochlorination systems generate sodium hypochlorite on-demand from seawater, providing a reliable and effective solution for biofouling control in seawater cooling systems within the demanding offshore oil & gas market.

Engineered for harsh offshore environments, FlexiFit systems offer modular flexibility for easy integration, rapid deployment, and minimal maintenance through automated features. Ready for retrofit or new-build projects, they ensure cost-effective and safe water treatment. Configure your system below.

System Capacities & Treatment Rates

Chlorine Capacity
(kg/hr)		 Chlorine Capacity
(lb/hr)		 Seawater Treated (m³/hr) at Dose:
1 ppm 2 ppm 3 ppm
2.5 5.5 2451 1225 817
5.0 11.0 4902 2451 1634
7.5 16.5 7353 3676 2451
10.0 22.0 9804 4902 3268
15.0 33.1 14706 7353 4902
20.0 44.1 19608 9804 6536

*Treatment capacities are approximate, based on nominal chlorine output and seawater specific gravity of 1.02.

Common Challenges & FlexiFit Solutions

Pipe showing biofouling before and after treatment

Biofouling Control

Preventing marine growth in seawater cooling systems, pipework, and intakes is critical for offshore operations. Our electrochlorination systems provide continuous, effective dosing of sodium hypochlorite to eliminate biofouling organisms, ensuring optimal heat exchanger efficiency and system flow.

Illustration showing equipment fitting in tight space

Space & Access Constraints (Retrofits)

Replacing aging systems often involves navigating tight doorways and limited footprints. The FlexiFit's modular design allows components to be easily moved and installed in constrained spaces without blocking maintenance access. Use our 3D configurator to optimize placement, or choose a fully assembled skid for single-lift installation where possible.

Illustration showing fast delivery or clock

Tight Project Schedules

Offshore maintenance windows and project deadlines are critical. FlexiFit delivers with short lead times for both standard and custom configurations, ensuring you get the right solution when needed to keep operations on track.

Illustration showing safety compliance symbols

Chemical Handling Safety

On-site generation of sodium hypochlorite from seawater eliminates the risks associated with transporting, storing, and handling hazardous bulk chlorine gas or concentrated chemical solutions, significantly enhancing personnel and environmental safety offshore.

Illustration showing self-cleaning cell or easy maintenance

Low Maintenance Burden

Offshore personnel need reliable equipment with minimal intervention. FlexiFit systems feature robust components and an automated self-cleaning system (CleanWave technology) to prevent scaling and maintain electrolyzer efficiency, drastically reducing manual cleaning requirements and downtime.

CONFIGURE YOUR PEPCON FlexiFit UNIT

Select base options and add optional modules as needed.

Generator Cell Module *

Chlorine Output Capacity *

Select the required chlorine generation rate per train.

I'm not sure what capacity I need
Capacity illustration
Duty Configuration *

Select the number and capacity of operating trains.

Duty configuration illustration
Power Supply *

Select the required power supply voltage and frequency.

Power supply illustration
Generator Options
H₂ Detector: Installs hydrogen detector(s) within the Electrolyzer Cell Enclosure to detect potential leaks.
Air Purge: Purges enclosure to prevent combustible gas buildup for HazLoc ratings.
Generator options illustration

Inlet Module

Boost Pumps

Required if seawater pressure is below minimum cell requirement.

Provides necessary inlet pressure to the electrolyzer cells. Select duty cycle below if added.
Boost pump illustration
Single pump sized for full system flow.
Two pumps, each sized for full flow, providing full redundancy.
Seawater Strainer

Removes larger debris from incoming seawater.

Protects downstream equipment from large particles. Select duty cycle below if added.
Seawater strainer illustration
Single strainer sized for full system flow.
Two strainers (duplex arrangement) allowing cleaning/maintenance without interrupting flow.
Pressure Control Valve Bypass
Consists of two ball valves for isolation, two drain valves, and a diaphragm valve for backup pressure control during PCV maintenance.
PCV Bypass illustration
Pressure Safety Valves (PSV)

Protects system from overpressure.

(Base: 1 x 100% Duty)
Standard configuration includes one PSV. Select checkbox to upgrade to a redundant (2x100%) configuration featuring a mechanical interlock key system for safe maintenance isolation.
Pressure safety valve illustration

Cell Cleaning Module

Cell Cleaning System
Required for maintaining cell efficiency by removing scale buildup. Choose Manual or Automated (CleanWave) below if added.
Cell cleaning illustration
Includes necessary connections and procedures for manual acid washing of electrolyzer cells. Requires operator intervention. Standard pump duty is 1x100%.
Manual Cleaning illustration
Fully automated self-cleaning system using proprietary CleanWave technology to prevent scaling and maintain efficiency with minimal operator input. Reduces maintenance significantly. Standard pump duty is 1x100%.
CleanWave Automated Cleaning illustration
Provides redundant cleaning pumps for increased reliability during maintenance.
Redundant Cleaning Pumps illustration

Degassing Module *

Select the method for removing hydrogen byproduct.

Uses a tank for passive hydrogen separation. Includes level gauge, drain, overflow, and 2 x 100% duty dilution air blowers for safe venting. Allows for hypochlorite storage buffer. Requires dosing pumps if injecting into pressurized line. Optionally add isolation valves for blowers.
Degassing Tank illustration
Uses centrifugal force for efficient hydrogen separation in a compact footprint. Includes 2 x 100% duty dilution air blowers and 1x100% degassing valve (upgradeable to 2x100%). Does not require boost pumps or separate dosing pumps for most applications. Provides no storage buffer for shock dosing. Includes flow control valve.
Hydrocyclone illustration
Remote Hydrogen Detector
Provides a hydrogen detector for field installation near the ceiling in enclosed rooms where hydrogen could accumulate. System shutdown initiated if LEL is approached.
Hydrogen detector illustration

Dosing Manifold Module

Number of Dosing Points *

Specify the number of separate injection points required.

Determines the complexity of the distribution manifold for delivering hypochlorite to multiple locations.
Dosing manifold illustration

Controls Module *

Control Type *

Select the desired control system level (All options are HazLoc rated).

Advanced/SIS requires communication protocol details.
HazLoc - Basic
Uses Siemens S7-1200 PLC. Includes 15" HMI Touch Panel (wall-mounted). Provides essential control, monitoring, and alarms. Enclosure: 316L SS, NEMA 4X/IP66, Ex db ec [ia IIC Ga] IIB+H2 T4 Gc rated.
HazLoc Basic Control Panel
HazLoc - Advanced
Uses Siemens S7-1500 PLC for enhanced processing and communication capabilities. Includes 15" HMI Touch Panel (floor-mounted console). Offers advanced data logging, trending, and remote access features. Enclosure: 316L SS, NEMA 4X/IP66, Ex db ec [ia IIC Ga] IIB+H2 T4 Gc rated.
HazLoc Advanced Control Panel
HazLoc - SIS
Built upon the Advanced PLC platform (S7-1500, floor-mounted 15" HMI). Adds a Safety Instrumented System layer for critical process shutdowns. Includes redundant, SIL-rated transmitters for key safety parameters, providing an independent protection layer. Enclosure: 316L SS, NEMA 4X/IP66, Ex db ec [ia IIC Ga] IIB+H2 T4 Gc rated.
HazLoc SIS Control Panel

Materials Module *

Select materials for each service.

Seawater Piping *
Material for pipes carrying incoming seawater.
Piping illustration
Seawater Valves *
Material for valves in seawater service.
Valve illustration
Hypochlorite Piping *
Material for pipes carrying generated sodium hypochlorite.
Piping illustration
Hypochlorite Valves *
Material for valves in hypochlorite service.
Valve illustration
Dilution Air Piping *
Material for pipes carrying dilution air for hydrogen venting.
Piping illustration
Dilution Air Valves *
Material for valves in dilution air service.
Valve illustration
Instrument Air Tubing *
Material for pneumatic instrument tubing.
Tubing illustration
Other Instrument Tubing
Base material for non-air instrument tubing is Titanium.
Tubing illustration

Skid Assembly Module

Skid Assembly
(Base: Loose ship modules with interconnecting pipe & electrical)
Mounts major components onto a common base frame. Skid is engineered to DNV 2.7-1 certification standards on a rugged tubular A36 steel frame, equipped with lifting points, and features a three-part marine epoxy coating. MTRs available upon request.
Offshore Skid assembly illustration

Customization Details

Special Requirements

Describe any specific requirements, modifications, or project details not covered by the standard options above.

{/* Removed empty description/image columns */}

Generated Part Number Breakdown

Generator Module: ---
Inlet Module: ---
Cleaning Module: ---
Degassing Module: ---
Dosing Module: ---
Controls Module: ---
Materials Module:
Seawater Pipe/Valve: ---
Hypo Pipe/Valve: ---
Dilution Air Pipe/Valve: ---
Instrument Tubing Air/Other: ---
Skid Module: ---
Full Part #: ---

Complete base configuration & materials to enable quote request.