Peter Huber Metal Hose Connection Tubing, NW25 M38x1.5, 100cm

The Peter Huber 6655 is a heavy-duty, industrial-grade insulated metal hose designed for the most demanding high-temperature thermoregulation tasks. Featuring a nominal width of NW25 and large M38x1.5 threaded connections, this hose is engineered to provide maximum flow cross-sections and optimum heat transfer, significantly reducing power loss in external temperature control applications. It supports an extreme temperature range from -100°C up to 350°C, making it an essential component for high-capacity Huber Unistats and large-scale industrial reactors. At 100cm in length, it provides a robust, short-coupled connection for high-flow systems. The hose is constructed from high-quality stainless steel (1.4404) and is protected by specialized multi-layer insulation with an additional smooth silicone outer jacket for maximum operational safety and easy cleaning.

Key Features:

• Brand: Peter Huber
• Model/Order No.: 6655 (MT-350-1-M38x1.5)
• Connection Type: NW25 with M38x1.5 threading (Sleeve nut according to DIN 3870)
• Length: 100 cm (1 meter)
• Temperature Range: Extreme versatility from -100°C to 350°C
• Material: Premium 1.4404 stainless steel construction
• Insulation: Special multi-layer thermal insulation with a smooth white silicone cover and protective silicone end caps
• Pressure Rating: Maximum operating pressure of 16 bar at 20°C (10 bar at 350°C)
• Dimensions: 63 mm outside diameter with a minimum bending radius of 240 mm
• Safety: Flame-resistant construction with a UL94-HB fire rating
• Weight: Robust design with a net weight of approximately 5.2 kg

This insulated metal hose is optimized for high-performance temperature control units where high volume flow and thermal integrity are paramount. The silicone outer jacket not only provides secondary insulation but also acts as a safety barrier to protect personnel from the extreme surface temperatures of the internal bellows. Its standardized M38x1.5 fittings ensure a vibration-resistant, leak-free connection for long-term reliability in pilot plants and industrial research facilities.

Frequently Asked Questions

1. Why is the NW25 width important for large systems?
The NW25 (25mm internal diameter) offers a significantly larger flow area than NW12 or NW20 hoses. This minimizes backpressure and allows the circulation pump to maintain higher flow rates, ensuring more uniform temperature control in large external jackets.

2. Can this hose be used for cryogenic applications?
Yes. With a rating down to -100°C, it is perfectly suited for ultra-low temperature tasks. The silicone cover and insulation prevent ice formation on the outside of the hose, keeping the workspace dry and safe.

3. What is the benefit of the 100cm length?
Short-length hoses (1 meter) are ideal for installations where the circulator is located directly next to the application. Shorter runs minimize heat loss to the environment and reduce the total volume of thermal fluid required for the system.

4. Is it compatible with all large Huber Unistats?
The 6655 is compatible with any Huber unit equipped with M38x1.5 connections. For units with smaller M30 or M24 connections, Huber offers high-flow adapters to bridge the different thread sizes.

5. How flexible is this heavy-duty hose?
Due to its large diameter and thick insulation, it has a minimum bending radius of 240 mm. It is flexible enough for standard connections but should not be subjected to tight loops or sharp kinks, which could damage the internal stainless steel bellows.