Integrated Subsea Cable Solutions: Zero Leakage, Maximum Reliability.
Professional cable overmolding and assembly services tailored for the most demanding subsea missions. Verified at depths up to 6,000m.
Mastering the Art of Subsea Connectivity: Our Core Technologies
Beyond basic wiring—we engineer robust, pressure-rated cable assemblies that guarantee signal integrity and zero-leakage performance in the deep ocean.

Precision Overmolding
Our overmolding process utilizes high-grade Polyurethane (PU) and Neoprene to create a true chemical bond between the cable jacket and the connector body. This advanced vulcanization technique eliminates potential water ingress pathways (capillary effect) at the most vulnerable junction points.
- Void-Free Molecular Bonding: Advanced vacuum-degassing ensures a bubble-free potting process, creating a perfect molecular bond between cable and connector.
- Anti-Capillary Protection: Our proprietary vulcanization technique effectively blocks the "capillary effect," preventing water from traveling through cable strands even if the jacket is damaged.
- Hydrolysis-Resistant Polymers: We use specialized Polyurethane (PU) and Neoprene grades that resist chemical breakdown and swelling during long-term saltwater immersion.
- High-Pressure Integrity: Every molded joint is designed to withstand structural deformation at depths up to 6,000m, ensuring the sealing interface remains intact.

PBOF Systems
For ultra-deep-sea missions, HYSF provides specialized PBOF (Pressure-Balanced Oil-Filled) assemblies. By utilizing oil-filled hoses and compensators, the internal pressure of the cable assembly stays equalized with the external environment, preventing structural collapse at depths of 6,000m and beyond.
- In-Situ Pressure Balancing: Internal oil-filled chambers equalize internal and external pressure, protecting thin-walled cables and sensitive conductors from crushing forces.
- Transparent Visual Monitoring: Features high-clarity, reinforced tubing options that allow operators to visually inspect oil clarity and wire conditions during maintenance.
- Quick-Connect Field Serviceability: Engineered with specialized fittings that allow for rapid oil filling or cable replacement in the field without specialized factory tools.
- High-Vibration Tolerance: The flexible fluid-filled system acts as a natural dampener, making it ideal for high-vibration environments like ROV thrusters and drilling tools.

Hybrid Harnessing
Simplify your subsea system design with our Hybrid Harnessing service. We integrate high-power delivery, high-speed Ethernet (Cat5e/Cat6), and sensitive analog signals into a single, ruggedized cable assembly. This reduces the number of penetrators needed for your pressure hull, minimizing risk points.
- Cross-Talk EMI/RFI Shielding: Integrated specialized shielding layers to ensure high-voltage power lines do not interfere with sensitive analog signals or high-speed data.
- Multi-Protocol Compatibility: A single harness can support 4K HD video (Coaxial), Gigabit Ethernet (Cat6), and DC power (up to 180A) simultaneously.
- Custom Y-Splitter Branching: Expertly engineered molded junctions (Y/X splitters) allow a single main cable to distribute power and data to multiple subsea sensors.
- Space-Optimized Integration: By reducing the number of required hull penetrators, our hybrid harnesses significantly minimize the risk points on your pressure vessel.

Strain Relief Engineering
In ROV and AUV operations, cables undergo constant bending and pulling. Our custom-designed Strain Relief Boots (SRB) are engineered to manage the bend radius and distribute mechanical stress away from the connector termination. This prevents cable fatigue and ensures long-term reliability during repetitive launch and recovery cycles.
- Graduated Stiffness Design: Custom-tapered strain relief boots (SRB) provide a smooth transition of flexibility, preventing sharp bends that cause internal wire fatigue.
- High-Load Towing Support: Designed with tear-resistant elastomers that can handle significant axial tension during launch, recovery, or towed-array operations.
- Abrasion & Impact Shielding: Heavy-duty outer layers protect the termination point from mechanical damage caused by seabed friction or deck handling equipment.
- Wide Temperature Adaptability: Our strain relief materials remain flexible and functional in extreme environments ranging from -60°C (Arctic) to +80°C (Thermal).

High-Speed Data for Deep-Sea Intelligence
Specifically engineered for high-bandwidth underwater applications, our Ethernet assemblies ensure low-latency transmission for the latest generation of subsea sensors.
- Best For: 4K UHD underwater cameras, high-definition multibeam sonars, and real-time ROV control systems.
- Technical Advantage: Specialized shielding and impedance matching to maintain Gigabit speeds even under extreme hydrostatic pressure.

Robust Power Delivery for Heavy-Duty Equipment
Designed to handle significant electrical loads without overheating, our power cables are the backbone of subsea propulsion and mechanical systems.
- Best For: ROV/AUV thrusters, underwater hydraulic power units (HPU), and high-intensity searchlights.
- Technical Advantage: High-current capacity supporting up to 180A, featuring heavy-gauge conductors and high-dielectric strength insulation.

Pressure-Balanced Integrity for Ultra-Deep Missions
Our PBOF system utilizes specialized clear or reinforced tubing filled with compensating oil to protect internal wires from being crushed by deep-sea pressure.
- Best For: Deep-sea oil & gas manifolds, scientific benthic landers, and pressure-compensated thruster systems.
- Technical Advantage: Available in high-clarity versions for easy fluid inspection and fiber-reinforced versions for high-tension durability at 6,000m+ depths.

Superior Protection in Harsh Saline Environments
We utilize premium Polyurethane (PU) and Neoprene outer jackets, offering the best balance of flexibility and ruggedness for dynamic underwater use.
- Best For: Towed arrays, dynamic ROV tethers, and any equipment subjected to seabed abrasion or reef contact.
- Technical Advantage: Exceptional resistance to hydrolysis, UV radiation, oil, and microbial attack, ensuring a service life of 10+ years.
Our End-to-End Cable Assembly & Validation Process
We follow a rigorous engineering workflow to ensure every cable harness is mission-ready for the most demanding subsea environments.
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Uanset om du har brug for et hurtigt tilbud på standardstik eller en kompleks, tilpasset kabelsamling, er vores ingeniørteam klar til at hjælpe. Forvent et teknisk svar inden for 12 timer.

John Zhang
ADMINISTRERENDE DIREKTØR
- info@hysfsubsea.com
- +86 13942853869




- Vores team besvarer dine forespørgsler inden for 12 timer.
- Dine oplysninger vil blive behandlet strengt fortroligt.