Silicone Hose FAQs

Why a silicone hose?

There is a growing trend that silicone hoses are replacing rubber hoses in some applications around extreme temperatures. Silicone hoses show good performances within extreme temperatures. At higher temperatures up to 300°C, it will not be excessively softening; under below zero it will not become rigid. However, black rubber hose will fail when working at continuous high temperatures. Further more, coolant, water and extreme temperatures all can cause hose deterioration. Rubber particles loose from the hose wall will cause clogged radiators, heater cores and thermostats. Hence, the best and the easiest way to solve this problem is to replace the black rubber hosed with silicone hoses.

The Thicker, the better?

A thicker hose is often mistaken for a good one. In fact, it is the reinforcement that determines the tensile strength/temperature rating. Thicker hoses over 4 plies reinforcement add no value in burst pressure, heating rating, etc. unless the same reinforcement is employed. Thick hoses made of low quality raw materials should be manufactured thicker for holding their shapes or forms. Leak issues often happen to thick silicone hoses. In addition, thick hoses are not so pliable, which makes them difficult to install. Many manufactures use polyester fabric, aramid, Nomex and nylon instead of fiber glass which is idea for working under very high temperature and high pressure conditions.

What is the appearance of high-quality silicone hose?

Obviously, it is a silicone hose with 4-ply polyester fabric. There are two drawbacks. First, the fabric begins to come off. Second, both of the outside and the inside are made of different materials.
Generally speaking, a qualified silicone hose should be smooth. Obviously, this wrap finish makes it unqualified and not suitable for usage.
One of products - straight reducer by 4-ply polyester, has a trim cutting, smooth finish and the material of inside and outside are coincident.

When selecting a silicone hose, the method of distinguishing high-quality silicone hoses from low-quality ones is spot its appearance. First, good silicone hoses should have a smooth finish, while the "wrap" should be as minimal as possible. Second, the layers of both inside and outside should be made of the same quality materials. Two different materials are used to reduce manufacturing costs and performances as well. Third, first-class silicone hoses should show a deep color and not a dull appearance. The image above is a model of our products. Smooth finish, deep color and the outside and inside layers share the same color prove it a qualified silicone hose.

How do I cut universal silicone hoses?

To get a trim cutting, there are two points for your special attentions. First, make sure that the hose be placed horizontally. Second, tighten a clip around the hose without deforming the hose. Then guided by the edge of the clip, you can cut the desired length with a sharp knife. However, the place near worm drive section is not available for cutting, for it is not even there.

How do I clean silicone hoses?

Rubbing alcohol, soap or WD-40 with warm mater will be suitable for wiping the hoses. For grease marks, WD-40 is very effective.

What is the right way of storing hose?

Storage has an important pact on the life span of hoses, new or used hose stored between jobs. Generally, hoses should be stored in flat oil on the floor, a shelf or a table. If hose is non-reelable, keep it in straight lengths. The environment for storage should be cool, dark, clean and with good ventilation.

How to select the right hose for particular applications?

We have got a simple principle for selecting the right hose: S.T.A.M.P.E.D.

  1. S stands for SIZE; I.D., length and sometimes OD.
  2. T stands for TEMPERATURE of the material conveyed and environmental 
  3. A stands for the APPLICATION, the conditions of usage.
  4. M stands for the MATERIAL being conveyed, type and concentration
  5. P stands for the PRESSURE to which the assembly will be exposed
  6. E stands for ENDS; style, type, orientation, attachment methods, etc.
  7. D stands for DELIVERY; testing, quality, packaging, and delivery requirements

Especially for selecting a silicone hose, working environment and materials being convey should be considered. Silicone hoses are often reinforced by different materials, each of which has different properties. Broadly speaking, polyester can be suitable for most applications. However, Nomex is preferred to higher temperature than polyester. When contacting with oil and fuel, the former two hoses can't work. Fluoro lined silicone hose is especially engineered for carrying oils for its low permeability.