The Benefits of the Right Hose for the Situation (2)


Different constructions give each type of hose different characteristics.

The most basic difference has to do with whether the hose is made of a single layer or multiple layers. Single-layer hoses are of course made with a single type of material. These can be used in situations where no pressure is applied during use.

The multiple-layer hoses come in three types: 1. hoses with different materials on the inside and outside to provide various characteristics, 2. hoses with threads woven into the middle layer, and 3. hoses with a construction of metal or plastic wire.

1. With the first type, different colors of hoses can be used to indicate the fluid inside or the direction of flow. Also, a combination of chemical resistance and flexibility is made possible using a fluororesin inside and a vinyl chloride construction on the outside.

2. The braided construction of the second type provides high pressure resistance for high-speed conveyance. This type is not made to withstand negative pressure (suction), however.

3. The third type features coiled reinforcement for resistance against crushing to maintain a flow path even when the hose is bent tightly. These can handle fluids even in a suction as they do not buckle under negative pressure. They are not as resistant to pressure, however, as the braided type.