| Author | Message | ||
     phil randall Experienced User Username: phil_randall Post Number: 16 Registered: 8-2006 |
i am having a pair of steel braided teflon/PTFE flexible front brake hoses made for my 1990 turbo r at half the price of the standard hoses, i will then be having made the 2 high pressure accumulator to chassis hoses for about £20 each instead of over £100, im now looking for some low pressure hose for the pump feed hoses. am i right to think that nitrile hose is the thing to get? thanks phil | ||
| Brian Vogel Prolific User Username: guyslp Post Number: 245 Registered: 6-2009 |
Phil, I would double check whether Buna-N (nitrile) is OK for mineral oil. I know that it's OK for petroleum based fluids. Viton is definitely OK, but more expensive. You also have the option of going with virtually any hose material that will stand up to the temperatures in the engine compartment if it's got a PTFE core. PTFE is chemically inert and OK as a carrier for any automotive fluid I'm aware of, including mineral oil. You might want to ask your shop that's making up the high pressure stuff what they'd recommend for "no pressure" gravity feed and/or return hoses for mineral oil. Brian | ||
| phil randall Experienced User Username: phil_randall Post Number: 17 Registered: 8-2006 |
Brian, ive now done a bit of resaerch but i don't seem able to find a definitive hose compatibility chart, however i have found a website called eFunda with a massive amount of engineering data, but it only has an o-ring chart...it shows that nitrile/buna n o-rings are compatible with mineral oil. but i will do as you suggest and ask the chap that's making my hoses. thanks phil | ||
| Richard Treacy Grand Master Username: richard_treacy Post Number: 2770 Registered: 4-2003 |
Use a standard transmission cooling hose. It is correctly reinforced to cope with underbonnet temperatures, is inexpensive, correct and easily sourced. Viton is generally a bad-news experiment anywhere automotive except in specific applications such as some oil seals. You can find a materials compatibility chart in the Technical Library. RT. |
