Dependable Freshwater Production Offshore and Onboard
In marine, offshore, and industrial energy operations, a dependable supply of freshwater is essential for crew welfare, safe operations, and long term self sufficiency. The Alfa Laval JWP Single Stage Freshwater Generator has a long track record of proven performance at sea, delivering a continuous supply of clean, safe freshwater directly from seawater.
We supply, install, and maintain Alfa Laval JWP freshwater generators across the global shipping, offshore, and industrial energy sectors. With decades of dependable operation in demanding environments, the JWP is a trusted solution that ensures facilities and vessels remain self sufficient wherever they operate.
Supply
We can supply brand new fresh water generators, directly to your site or vessel. All units are quality-checked and tested to ensure they meet OEM standards.
Installation
Alfa Laval engineers ensure seamless integration into your system. Whether it’s a retrofit or part of a new installation, we handle every aspect with precision and efficiency.
Servicing
We provide full servicing, including inspections, bowl cleaning, seal replacements, and emergency repairs to keep your separator running efficiently.
About the Alfa Laval JWP System
The JWP system uses a single stage evaporation process to efficiently convert seawater into high-quality freshwater. Its robust, well-proven design is built for a long service life, with straightforward operation and easy maintenance, making it a reliable choice for a wide range of marine and industrial applications.
Compact in footprint yet capable of steady production, the JWP balances performance, durability, and simplicity, ensuring dependable freshwater generation under variable load and environmental conditions.
JWP
Built to convert seawater into high quality freshwater. Proven performance across shipping, offshore, and industrial energy operations, with straightforward operation, low energy consumption, and easy maintenance.
- Type: Single-stage shell-and-tube freshwater generator
- Function: Produces fresh water from seawater by vacuum evaporation and condensation
- Application: Marine vessels (main engine cooling water recovery), offshore rigs, and installations needing onboard fresh/technical water
- Single-Stage Design: Uses one evaporation–condensation stage (simpler than AQUA Blue E2)
- Heating Source: Jacket water (typically ~60–90°C) or steam from auxiliary boilers
- Construction: Titanium heat exchanger tubes (resistant to seawater corrosion)
- Control: Automatic operation with monitoring of temperature, pressure, and salinity
- Capacity Flexibility: Multiple sizes for small to large ships
- Capacity: ~0.5 – 100 m³/day (depending on model, seawater temp, and heating source)
- Operating Temp: Works with jacket water from ~60°C and above
- Freshwater Quality: Typically <2 ppm TDS (potable water quality)
- Vacuum System: Ejector-driven or water ring pump
- Mineraliser unit (adds hardness for drinking water)
- UV steriliser or chlorine dosing unit
- Freshwater pumps and storage tanks
- Salinometer for automatic dump of off-spec water
- Proven technology — decades of use in marine sector
- Rugged & reliable for harsh shipboard conditions
- Wide capacity range (small vessels to large ships)
- Lower initial investment cost than newer plate-based systems
Key Benefits of the Alfa Laval JWP System
- High-Quality Freshwater: The system uses vacuum distillation to produce high-purity freshwater with a low content of dissolved solids (salinity).
- Corrosion Resistance: JWP freshwater generators are constructed with high-grade, corrosion-resistant materials.
- Durability and Reliability: Engineered for continuous operation in demanding environments.
- High Efficiency: By maximising the use of available energy and operating under vacuum, the system achieves efficient freshwater production.
How Can We Help?
Contact us today to discuss your requirements. Our expert team is here to help you choose the right solution for fresh water generation and keep it operating smoothly for years to come.
Technical Advice is always FREE from Premier.
Authentic Quality
We only supply Genuine Alfa Laval machines and high-quality spare parts.
System Expertise
We understand the challenges of both Marine and Energy applications and offer tailored solutions.
Fast Delivery
Access to real time stock levels, so we can offer quick turnaround times and accurate lead times.
Competitive Pricing
Superior products at the best price point, with special bulk pricing available. Quotes available in GBP, EURO & USD.