Derul Neutral Buoyancy Marine Industrial Tether Cable | Zero Buoyancy ROV Umbilical Cable
Specification
| Basic Structure | Conductor+Insulation+Jacket+Hose |
| Conductor | Plain Copper/ Tinned Copper |
| Insulation | PE |
| Braid | Kevlar/ Plain Copper/ Tinned Copper |
| Jacket | PUR/TPE/PCP |
INTRODUCTION
1.Derul neutral buoyancy marine industrial tether cable is a professional subsea zero buoyancy umbilical cable independently developed by Derul Cable for harsh ocean underwater operations.
Different from ordinary sinking underwater cables, Derul marine tether adopts precision foam PUR buoyancy balanced structure, making the cable overall density close to seawater density to achieve near-zero net buoyancy. No extra vertical pulling force or hydrodynamic drag will be generated during underwater movement, greatly reducing load consumption of ROV, underwater drone and marine inspectUnderwater cableion equipment.
As a universal marine industrial tether, it supports pure power cores, signal twisted pairs, and hybrid power-fiber optical integrated customization, widely matched with observation ROV, work-class ROV, underwater camera, aquaculture monitoring system, offshore wind farm inspection equipment and other marine submersible devices.
Brand: Derul
Type: Neutral Buoyancy Marine Tether / Zero Buoyancy Subsea Umbilical
Rated Voltage: 300V / 600V low voltage
Core design: Custom multi-core power, signal pair, single-mode/multi-mode fiber hybrid integrated
2.Internal Structure & Standard Technical Parameters
Conductor: Class 6 ultra-fine tinned copper strands, ultra-flexible, anti-corrosion, low transmission resistance, stable power & signal output
Insulation: High-density FPE waterproof insulation, anti-hydrostatic pressure, low signal attenuation
Buoyancy Balance Layer: Closed-cell foam PUR inner layer, precise density calibration to reach neutral buoyancy in standard seawater (1.027g/cm³)
Tensile Reinforcement: High-strength Kevlar aramid braided layer, strong axial pull resistance, anti-torsion, anti-breakage under ocean current impact
Outer Sheath: Marine-grade wear-resistant PUR outer jacket, IP68 full waterproof, salt spray resistant, UV resistant, oil resistant, anti-marine organism adhesion
Core Technical Data
Net buoyancy in seawater: ±0.02 N/m (strict neutral floating)
Operating water depth: Customizable from 100m to 3000m deep sea
Operating temperature: -40℃ ~ +90℃
Minimum bending radius: 6× cable outer diameter
Repeated torsion cycles: Over 1,000,000 times without core damage
Breaking tensile load: Customized according to cable diameter, up to 5 tons
Standard core options: 2/3/4/6/8 power cores, 1/2/4/8 signal twisted pairs, single/multi-mode optical fiber hybrid
3.Main Industrial Application Scenarios
Observation & work-class ROV umbilical tether, underwater drone zero buoyancy cable
Offshore wind farm subsea inspection robot, underwater camera floating cable
Ocean scientific research, deep-sea exploration, seabed topography survey equipment tether
Open-sea aquaculture water quality monitoring submersible equipment power & signal cable
Dredging engineering, dam underwater inspection, underwater salvage robot tether cable
Diver life support hybrid umbilical cable (power, communication, gas pipeline integrated)
Port underwater hull inspection, underwater pipeline detection robot floating cable
ISO9001 Quality Management System Certificate
CE EU Marine Equipment Certification
Raw material salt spray test, hydrostatic pressure test, tensile cycle test report
Water-blocking performance, buoyancy stability long-term aging test report
Support third-party testing SGS, TUV, BV upon customer request.
Customization Support: Custom core quantity, wire gauge, fiber count, cable outer diameter, sheath color, surface printing Derul logo, length cutting
Standard Length: 100m / 200m / 500m / 1000m per reel, MOQ 100 meters, free sample for lab testing
Packaging: Waterproof plastic film + wooden cable reel / iron reel, moisture-proof seaworthy package for sea freight
After-sales: 18-month global warranty, professional marine cable engineer one-on-one technical selection support
4.FAQ
Q1: What is neutral buoyancy marine tether cable?
A: Marine-grade PUR outer sheath with anti-fouling formula, resist salt spray corrosion, seaweed and barnacle adhesion, suitable for long-term offshore deployment.
ADVANTAGES
True neutral buoyancy design: Eliminate cable sinking drag, reduce ROV thruster energy consumption by 30%–50%, improve underwater hovering stability and control accuracy
Ultra-high tensile & anti-torsion: Built-in Kevlar braid withstand long-distance towing, ocean current impact and frequent 720° torsion without wire breakage
All-seawater corrosion resistance: Tinned copper + PUR double anti-corrosion structure, long-term service in saltwater, fresh water, muddy water and offshore industrial sewage
Super flexible & fatigue-resistant: Ultra-fine stranded conductor matches foam elastic layer, adapt narrow pipeline, underwater manipulator and reel repeated winding
Deep water pressure resistance: Custom reinforced anti-compression structure, stable operation in deep-sea high hydrostatic pressure environment without buoyancy failure
Integrated hybrid customizable: Realize power supply, real-time video signal, optical fiber high-speed data transmission in one tether, simplify underwater wiring layout
Long service life: Anti-aging outer sheath resists sunlight, ozone and marine biofouling, service life 4–7 times longer than common PVC underwater cables
CUSTOMIZATION CAPABILITY
We are your reliable partner in special cable customization
Considering different working conditions and clients' request, Derul's cable product can be highly customized.
To best meet the demands in our clients' practical application, we can offer highly customized solution and quality cable product, to ensure the cable is suitable for our clients.
We welcome new clients to send us specific requirement. Our teams will evaluate it and offer unique technical datasheet and technical drawings to you.
Our competitive price which most clients could afford will be another key to our successful and efficient cooperation.
As the original manufacturer, we provide quick response to any of our clients' inquiry. We have close interconnection between the workshop, engineer and sales person.
FAQ
Q: Is Derul Cable the original manufacturer?
A: Derul Cable is a special cable manufacturer. Our factory is based in Shanghai.
Q: Is the price negotiable?
A: Yes, the price is negotiable. Our price is also flexible due to several factors including purchase quantity.
Q: What is the regular MOQ for your cable?
A: Any quantity is okay to purchase for product at stock. For product with no stock, its MOQ is usually 100-200 meters per type.
Q: How can I get sample?
A: Usually you only need to pay the express freight, and after your confirmation of the product dimension and structure, we can arrange the sample and send it directly to you.
Q: Is OEM or ODM service available?
A: OEM and ODM services are both available. You can provide us with your requirement for the product and we will evaluate it to push forward.
Q: What is the regular production time?
A: For regular quantity, it usually costs about 15-25 days to produce.
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Quick Links
WhatsApp: +86 13641831061
E-mail: sales@derulkable.com
Add.:No.236 Fenggao Road Fengxian District Shanghai China
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