Ultra-pure hydrogen for CVD diamond production
APPLICATIONS - CVD DIAMOND MANUFACTURINGOn-site PEM electrolysis that delivers high-purity hydrogen, stable growth conditions and reactor uptime, for optimal diamond yield and colour.
99.9999%
Ultra high purity hydrogen for all CVD applications
Dependable
Reliable and constant on-site supply
6x smaller
Endua’s PEM electrolyser produces 6x more hydrogen than alkaline electrolysis over the same area
Hydrogen that keeps your reactors running
CVD diamond growth is unforgiving — contamination, pressure variation or supply interruption can ruin a batch.
Endua's PEM electrolysers are designed for the consistency and uptime your process demands.
Up to 99.9999% H2 purityUltra-high purity hydrogen
Deliver consistent hydrogen quality suitable for gemstone-grade CVD processes, eliminating further downstream purification.
Modular and scalable Scalable supply architecture
Whether you are starting with one of Endua’s modular electrolysers or many, you can be comfortable knowing Endua has a configuration to suit your needs.
6x more hydrogenContinuous, baseload operation
Deliver consistent hydrogen quality suitable
for gemstone-grade CVD processes, with system configurations compatible with downstream purification where higher purity grades are required.
>99% uptimeCompact and powerful
Endua’s PEM technology produces 6 times
more hydrogen than Alkaline from the same volume of material. Smaller footprints provide more floor space for CVD production
Built for the way CVD operations actually work
Endua's modular architecture gives greater control over your configuration and hydrogen supply. Adaptable to your reactor density, layout and gas handling infrastructure — centralised or distributed, single-site or multi-site.
In-lab
generation models
Supply multiple reactors or production areas from a single shared hydrogen solution, producing ultra-high purity hydrogen, at the scale your operations require.
Cluster and
precinct supply
Enable hydrogen distribution across co-located manufacturers with Endua’s large scale electrolysers. Supporting shared infrastructure models such as industrial clusters, technology parks, or shared diamond production facilities.
Renewable energy integration
Pair on-site hydrogen production with solar or other renewables. Endua's 7.5–100% operating range tracks variable energy input, reducing exposure to grid price volatility and supporting low-carbon diamond production.
Every CVD operation is configured differently. Variations in reactor density, layout and gas handling systems means a one-size-fits-all approach rarely works.
Endua works with manufacturers to assess hydrogen demand and purity requirements, designing on-site supply systems that improve control, reduce reliance on delivered gas cylinders, and simplify fragmented hydrogen infrastructure across your facility.
Align hydrogen
supply with your
production setup
Frequently asked questions
Common questions from CVD diamond manufacturers
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On-site generation can be effective at small scale, but most facilities use compact hydrogen generators sized to individual reactor demand. Larger PEM systems are typically better suited to operations with higher or aggregated demand, such as multi-reactor facilities, expanding production sites or shared supply models across multiple operators
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Yes, a single electrolyser can be configured to supply hydrogen across multiple reactors, provided total flow requirements are matched. Hydrogen is typically distributed via a central supply line with pressure regulation and flow control, allowing multiple reactors to operate simultaneously from a coordinated source.
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Endua systems can scale with production demand, supporting higher flow rates as reactor fleets expand. This avoids the need to add multiple small generators over time, enabling a more coordinated supply approach that aligns with increasing throughput and reduces system complexity.
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Endua systems can be configured with buffer storage and redundancy strategies to maintain continuous hydrogen supply. This supports stable operation across long CVD growth cycles, helping reduce the risk of interruptions that could impact product quality or result in lost batches.
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As reactor numbers increase, managing multiple small generators can become complex and inefficient. A centralised system becomes more practical when hydrogen demand grows, infrastructure is being upgraded or facilities are looking to improve supply control and reduce duplication across operations.
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Yes. PEM electrolysers can be integrated with existing gas handling systems, including piping, storage and pressure control. Where higher purity hydrogen is required, they can also be paired with downstream purification systems to meet more stringent specifications for advanced CVD applications.
Take control of
your hydrogen supply
Endua partners with CVD diamond
manufacturers to assess hydrogen demand
and design supply systems optimised for your production setup. Get in touch to discuss your requirements.
Resource: On-site hydrogen production checklist
Download our free resource with expert advice, guidance and strategies for your hydrogen project.
