BSPP to NPT plastic fittings 1

[TIMMAAYY]

Looking for a way to go from a 2" female BSPP ( G ) thread to a male 1" NPT thread. Ideally, it would be a combo reducing/thread type.

The ideal fitting would be 2" Male BSP to 1" Male NPT.

Any suggestions on where to find this? I've tried all of the usual sources ( Grainger, Cole Parmer, etc ). No luck.

Ideally it would be plastic, but if they are just plain steel, that might work too.

Thanks.

 

[patprimmer]

A block of nylon, a lathe, a 2"female BSPP tap, a 1" male NTP tap. and the appropriate size drills. You can look them up in a chart yourself.

If you want to do it in a pedestal drill, use a female 1" NTP tap and a 1" NTP nipple.

Regards
Pat
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[MikeHalloran]

Try your local Swagelok distributor.



Mike Halloran
Pembroke Pines, FL, USA

 

[TIMMAAYY]

Thanks, Pat. That's what I figured it would come to. I have a small machine shop helping me out. They do this kind of work in the specialty valve market.

I can find a 2" BSP male, but not one in plastic, and they start around 65 bucks each.

I think what will work best is a 2.5" piece of plastic rod, threaded down on both sides and leaving a 1/4" ORB for the BSP seal. The through hole needs to be 3/4" diameter.

Thanks again.

 

[patprimmer]

I suggested nylon, but I should have asked what fluid and what environment. Plastic is about as general as saying metal.

Regards
Pat
See FAQ731-376 for tips on use of eng-tips by professional engineers &

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[TIMMAAYY]

My bad on "plastic" ... haha! The rest of it is polypropylene. It doesn't matter to much as long as it's able to withstand urenthane chemicals ( polyol and isocyanate ). Nylon, Delryn, whatever is cheapest and has no issues with those two families of chemicals.

 

[patprimmer]

I would think all would be OK with urethane systems.

Acetal (Delrin) is best at holding threads unless the temperatures go over 70 or 80 deg C when nylon will take over. Neither like exposure to acids

Regards
Pat
See FAQ731-376 for tips on use of eng-tips by professional engineers &

http://eng-tips.com/market.cfm

for site rules

 

[dbaird]

The closest I could find is 2"male BSPP to 1-1/2" NPT:

http://www.discounthydraulichose.com/9035_BSPP_x_NPTF_Female_p/9035.htm

David Baird

Sr Controls Designer
EET degree.
Journeyman Electrician.

 

[MintJulep]

Did you try Adaptall?

http://www.adaptall.com/index.html

 

[TIMMAAYY]

No one has what I need in any type of plastic. I'm having them made by a local shop, a 2" male BSPP thread on one side with a o-ring groove and boss, and 1" male NPT on the other side with a 3/4" hole through the entire piece.

Thanks for all the suggestions.