Y Type Strainers

[DavidK199]

Hi All,

I have a Sulphuric Acid line, terminating in ASA 150 flanges, where we need to insert a plastic (PTFE, PVDF, or Polypropylene) Y strainer in between connections.

We are having difficulty sourcing a totally plastic strainer. We installed pipework in 2009 but due to site issues the process has not even begun yet! In 2009 we could source the Y strainer's locally and were under the impression they were 'off the shelf' items.

Now, it seems, there are hardly anyone who supply these products, and even the ones that do are charging incredibly high machining costs.

I understand the global situation surrounding Polymer and that these prices are bound to rise but not this much since 2009 surely?

I just want to know whether I'm being unreasonalbe, or if I am purely not looking hard enough. Or am I just wasting my time... might have to go with very expensive option or a cast metal with plastic lining (still expensive). Sizes are 1 & 2".

Any thoughts would be greatly received.

Many Thanks

 

[zdas04]

I did a Google Search for PTFE Y-Strainer and got a bunch of links. All of them say "low cost alternative". The one that repeated the most was Micromold, but there were others. None of them said limited availabilty (but I didn't place an order).

Is there some really special requirement that you didn't tell us about?

David

 

[micalbrch]

Do not laugh about me but you wrote "any thoughts would be greatly received".

I know that you can buy PP Y-filters for garden lagoons (koi carps). They are available up to 3" but I do not know if the mesh size and pressure meets your requirements. But it is perhaps a different approach than the ones you were taken so far.

 

[ione]

How many pieces do you need? And what do you mean by “expensive”?

 

[DavidK199]

Thanks for your responses. I think the issue seems to be getting ones with ASA flanged connections. All the low cost alternatives appear to be with standard pipe threads. Micromold are one option I am considering, and I have been in touch with them.

No special requirement, just has to be ASA150 flanged both ends with all components made from PTFE/PVDF/Polyprop.

I am based in the UK too, so all American manufacturers seem to pass us to a UK distributor who obviously put prices up. We have a USA sister company who is trying to source direct from USA manufacturers but we're still struggling.

Thanks again.

 

[DavidK199]

And just 1 off x 1" and 2 off x 2"

 

[micalbrch]

Can't you work with threaded flange adapters? Buy the one with threaded pipe end and add flange adapter pieces to it.

 

[DavidK199]

The site is very much against using any type of threaded connection. Full integrity on all systems is a big deal, and majority of connections are either flanged, triclamps or welded.

Sorry, to clarify what I meant by expensive - in 2009 these were available locally ex-stock at £50-100. Until now, there's been pipework issues on-site, and now the issues are resolved, strainers and flexibles are the last items needed before process can begin. The local stockist now doesn't supply them, and we are now getting prices of $700+. We have conceded to the fact that they are not going to be as cheap as we first thought, but wanted everyone's opinion in case I was missing something.

Thanks