Rubber hose is still a popular choice for many automobile/motorcycle fuel systems. It is relatively inexpensive and very easy to install. Pick the best rubber hose for your fuel system is important .
There are at least two characteristics of rubber hose that really make a difference : pressure rating and permeability. Pressure rating is easy to understand. If you have a carbureted engine, the typical maximum fuel pressure may be just a few psi inside the fuel line. However, a fuel-injected engine requires much higher fuel pressure—100 psi or more. You need to equip your car with hose that can reliably handle the fuel pressure demands.Permeability is the ability of the fuel to bleed through the walls of the rubber fuel hose into the atmosphere. Yes, actually quite a bit (gallons) of fuel is continually lost from the walls of rubber fuel lines and escapes as vapor into the air as a function of time. This is a big deal for several reasons. First, no one wants to throw away good fuel. Second, the environment really pays for that entirely polluting vapor. And third, as fuel bleeds through the walls of the hose it breaks down the rubber compounds. This is the reason the hose deteriorates. So it follows that if we can reduce permeability we will save money in lost fuel, save the environment big-time and best of all: Make the hose last a long time! Most modern hoses have been formulated to possess this trait of low permeability, but some of the less expensive versions (lawn-mower grade) are still very popular.
Is the pressure rating and permeability of a hose listed on its surface ? Usually not! Instead, a numbering system is in place that provides this same information. In the U.S. an industry standard group (SAE J30) has created a number of rubber hose standards that manufacturers utilize when making hose. These standards are documented and published so everyone can determine what pressure ratings, permeability, compatible fuels and other characteristics are assigned to a specific hose type. Those standard hose types are often printed on the outer covering of the rubber hose .
The standards and ratings shown are very approximate and not all inclusive. Hose diameter and other factors will alter the pressure limits. Double-check and verify these specifications by using Google (e.g., “SAE 30R9 specs”) to view the standards from official documents and vendors online.
Main Performance of SAEJ30 R9:
1.Permeability meet SAE J30 R9,<15grams/m2/day
2.Aging resistance:150℃; Low temp resistance:-40℃
3.Burst pression: >40kgf/cm2
4.Fuel resistance:CE10,CE20,CM15,CM85, OXIDIZED FUEL,FUEL A/B/C/D
5.Flammability resistance:Self extinguish at 10 secs
6.Ozone resistance:50pphm*48H
If you purchase custom rubber hose for your fuel system, be ready to demand and identify the rubber hose .Xiamen Fuste is a professtion rubber hose manufacturer for more than 19 years .We can help you to customized the suitable rubber hose to make that hose last as long as possible!More details ,please send email to me:sales@rubberbiz.com