Published on:2026-05-24 Click:38
High-flexible TPU double-jacket 2 SM fiber underwater ROV tether. Double TPU jacket for cold-weather flexibility, 2 single-mode fibers for high-bandwidth ROV tether.
The high-flex TPU double-jacket 2 SM fiber ROV tether uses Thermoplastic Polyurethane (TPU) -- a higher-performance jacket compound than standard PUR -- in a double-layer construction for superior cold-temperature flexibility and abrasion resistance. Two OS2 single-mode fibers provide dual-channel high-bandwidth data links. The TPU compound maintains rubber-like flexibility at temperatures as low as -40°C, making this tether suitable for Arctic and cold-ocean ROV operations. The outer layer can be foamed for buoyancy per specification. The foamed polyurethane (PUR) jacket uses a micro-cellular expanded jacket compound with a bulk density lower than seawater (~1.025 g/cm³), giving the cable near-zero or positive net buoyancy. This eliminates tether sag and reduces drag force on the ROV, improving vehicle manoeuvrability and reducing tether management workload during subsea operations.
| Parameter | Specification |
|---|---|
| Fiber | 2 x SM OS2 (9/125 μm) in loose tube |
| Inner Jacket | Solid TPU |
| Outer Jacket | TPU (foamed optional) |
| Flex Rating | -40°C to +80°C |
| Electrical Cores | Per spec (power + signal) |
| Strength Member | Kevlar optional |
| Depth Rating | Up to 6,000 m |
| Custom | Buoyancy, Kevlar, electrical cores, length |
Request datasheet, custom length, or OEM pricing: sales@rovcable.com -- Shanghai Kabel Intelligence Technology Co., Ltd.
The jacket is manufactured from a micro-cellular expanded (foamed) polyurethane compound. During extrusion, a controlled foaming agent creates millions of tiny closed-cell air pockets within the jacket wall. These air cells reduce the bulk density of the jacket below that of seawater (~1.025 g/cm³), producing positive or neutral net buoyancy. The jacket retains all the abrasion resistance, oil resistance, and flexibility of standard PUR while achieving the buoyancy needed for ROV tether applications.
TPU (Thermoplastic Polyurethane) and PUR (Polyurethane) are closely related but TPU is typically more elastic, has higher abrasion resistance, and better low-temperature performance. TPU is the preferred choice for applications requiring very high flex life (>10 million cycles) or cold-temperature operation below -30°C. PUR is more common and cost-effective for standard ROV tethers. Both are excellent in seawater.
