The Dunlop Hiflex Superforest 3SK cold-resistant hoses are designed for use in sub-zero temperatures, where a conventional high-pressure hose cannot operate. The maximum temperature threshold of this type of hose is -55 °C, which is 15 degrees higher than that of a conventional high pressure hose.

The 3SK Dunlop Hiflex Superforest – is an intermediate hose between the 2SN and 4SP types. According to the requirements of the standard, 3SK hose can be used at temperatures from -55 to +100 ° C, transfer at a maximum pressure of 420 bar for a hose diameter of 5 mm oil, fuel, antifreeze, water. The 3SK hose can also be used for air transmission with temperature not exceeding 70 °C.

Testing of 3SK hoses

The 3SK high pressure hoses have three layers of rubber and metal braid. Each of the layers is sequentially overlapped, thus achieving the strength properties of the hydraulic hose.

Any of the frost resistant hoses are tested for frost resistance. The test is carried out at the manufacturer's factory. The hose is placed in a freezing chamber for several hours, after which the hose is bent. If in the process of bending the hose, clicks and cracks are heard - this indicates that the metal wire is cracked and the hose cannot be used at high sub-zero temperatures.

The 3SK Dunlop Hiflex Superforest hoses are a top quality product, a product that can withstand over 1,000,000,000 million pulses, and generally have a long life. These sleeves are as good as their competitors, Parker or Gates, in terms of technical and quality characteristics.

If you are looking for a high quality hose at a price lower than Parker high pressure hoses, we recommend you to look at Italian Dunlop Hiflex hoses.