Too Much Dirt in LPG

[NICAT]

Hi.
I finally had LPG installed which costed 700$.
Everything is fine. Engine runs smoothly, performance is almost same as gasoline.
But the only problem that people report is that, LPG in our country, has too much dirt in it. Filters and Injectors (and other parts) are clogged often. But still it worths using LPG since it is 50% cheaper than gasoline.
The company who did the conversion offers 2 years warranty, and they are doing the maintenance for free. Also they told me that they are making new filters especially designed for our fuel. But as far as i understood, since there is no fuel pump in LPG, more agressive filtering, reduces the fuel pressure at high RPMs.

I know, it may sound like a stupid question, but do you think it would be possible to have extra filter installed to LPG gas filling hose ? Or the high pressure during filling would tear the filter ?

 

[mattwithcats]

https://www.allianceautogas.com/new-lpg-filter-removes-potentially-harmful-particulate-matter/

https://www.allianceautogas.com/wp-content/uploads/2016/07/Donaldson_Filter.pdf

 

[Linctex]

Originally Posted by NICAT
Hi.
Or the high pressure during filling would tear the filter ?


Filters only tear from differential pressure - the difference of pressure between inlet and outlet.

There are several different ways to filter LPG, but I don't know how available they are in Azerbaijan

 

[mk378]

There will be plenty of pressure unless you let the filter get clogged or are in very cold weather with the tank nearly empty.

The usual advice about buying fuel from a reputable supplier applies.

 

[DrDanger]

It is possible to install a liquid phase filter to the gas bottle. They run 100$ here and if your system is compatible at least as much for the install.
Your 2 filters are probably sufficient. 20k km is my filter interval for both filters.
Cut your used filters open and make up your own mind. At 10k mine are almost clean.

 

[Donald]

I do not think we worry about dirt in LP gas in the USA. But dirt getting into an engine via any means is bad news.

 

[NICAT]

Hi.
Thanks for replies, i found high pressure filter.
It is very useful, cleanable filter. Price is reasoanble

 

[pep808]

what kind of dirt?
lpg system should have wet & dry side filter ~1year change interval.
problem with cheap gas is the varnish/goo deposits.
you can´t stop them going through filters. they are liquids disolved in lpg.

http://www.pro-tec-deutschland.com/en/products/fuel-system/fuel-system-lpg/lpg-system-clean-protect

 

[nthach]

The system should have a coalescing filter and another on the engine side. The coalescing one will catch any oil/water aerosol and bigger particles from the fuel supply. CNG engines have two filters.

 

[Dinoburner]

The Donaldson mentioned in the links by mattwithcats claims to filter out heavy ends which is excellent IMHO.

 

[Garak]

Originally Posted by Donald
I do not think we worry about dirt in LP gas in the USA. But dirt getting into an engine via any means is bad news.

It was never an issue for us, and those engines went hundreds of thousands of kilometres. There was an anecdotal story to avoid Co-op LPG because the word was that it had an additive that would gum up mixers after an extended period. I never filled LPG at a Co-op in my life, with their wonderful roll-up-the-sidewalks-at-9p.m. philosophy.

 

[CT8]

A filter is needed there is rust from the storage tanks. .

 

[das_peikko]

What kind of car did you have converted over to LPG ?

 

[Garak]

Originally Posted by CT8
A filter is needed there is rust from the storage tanks. .

If there was, that filter only was changed at recertification time on the LPG units on the cars.