Do CCM DPOCV Fittings Require O-rings?

[kennyd]

I don't understand half the abbreviations in this thread but my ccm top link hose fitting to toplink leaked regardless of how tight I got the fittings until I used some pipe dope (with yet another abbreviation I can't remember but found it here on tbn). Really enjoy it now but have had to try different combinations of hose end fittings (costly...) and direction to get it to fit my 3pt space beyond the leaking.

So, did you have the washer/o-ring seal? I am guessing not. No way should a thread sealer be needed for BSPP fittings.

 

[J_J]

Maybe this will help explain some things.

British Pipe Standard fittings are amongst the most popular of all foreign threads in the world today. These threads come in two versions: parallel (BSPP), and tapered (BSPT). The thread flank angle for both tapered and parallel British threads is 55°. NOTE: It is a fairly common mistake to identify a BSPT (tapered) as an NPT. Always remember that NPT threads have a 60° thread flank angle, and BSPT has a 55° angle (this can be verified with a thread gauge). Although BSP is a foreign thread, it isn’t actually metric. This is why it comes in imperial sizes: 1/8, 1/4, 1/2, 3/4, and so on.

BSP parallel threads commonly seal via a 30° chamfer on the male thread to a 30° recessed cone inside the female thread (swivel only). If it is a port application, an O-ring and washer or a bonded washer are needed to achieve a proper seal for parallel threads. For tapered BSP threads, a seal is acquired via thread wedging with additional support from thread dope or Teflon tape. As previously mentioned, it is possible for a male BSPT (tapered) to thread into a female BSPP (parallel), so long as the female thread is fixed and not swivel (this is because of the recessed cone seat).

 

[rjkobbeman]

I get the difference between BSPP and BSPT and don't think anyone was confusing the difference.

The CCM HTL uses BSPP on their DPCV and provides the fittings for it. For me, and it sounds like others, there were no washer-and-o-ring provided. I questioned this when I took delivery and opened the box. I called CCM and they said NO washer-o-ring was to be used. That seemed odd to me, however I just did what they said and have had no problems.

Now that this topic has been brought up again, I called CCM again and they said the same thing.

Can someone with more knowlege (KennyD, JJ, etc.) call CCM and asked them? With my limited knowledge (although I do completely understand), I can't offer a rebuttal to them. They tried to give me an explanation, however I have no personal experience on this type of fitting to argue.

 

[Wayne County Hose]

If it is a BSPP fitting screwing into a port, it definately needs a bonded seal. If it seats by the internal cone, no bonded seal required. IMHO, it's not worth the aggravation of going thru CCM. Just go to a hose shop and pick up what you need.

 

[J_J]

Even after reading post #22. some people still doubt common logic. If there is a cone and a recessed cone, seems like it works similar to JIC connections. Metal to metal. No stinking o-ring needed . Just my view point.

 

[J_J]

Some more data .


British Standard Pipe - BSP (BSPP Parallel & BSPT Tapered)

British Standard Pipe - BSP (BSPP Parallel & BSPT Tapered)

The British BSP connections include two types of threads, BSPP which are straight (or parallel) and BSPT which are tapered. The BSPT tapered male will mate with a BSPT tapered female (usually a port) and seals on the threads. The BSPP parallel male has a 30° chamfered seat which seals with a BSPP swivel female on its 30° cone seat. (Similar to the American NPSM-NPTF connection, however the BSPP swivel female end is commonly found on couplings.)

It just seems obvious to the most casual observer.

 

[kennyd]

I get the difference between BSPP and BSPT and don't think anyone was confusing the difference.

The CCM HTL uses BSPP on their DPCV and provides the fittings for it. For me, and it sounds like others, there were no washer-and-o-ring provided. I questioned this when I took delivery and opened the box. I called CCM and they said NO washer-o-ring was to be used. That seemed odd to me, however I just did what they said and have had no problems.

Now that this topic has been brought up again, I called CCM again and they said the same thing.

Can someone with more knowlege (KennyD, JJ, etc.) call CCM and asked them? With my limited knowledge (although I do completely understand), I can't offer a rebuttal to them. They tried to give me an explanation, however I have no personal experience on this type of fitting to argue.

With all due respect, I don't need to call them. I did not buy my HTL from them and I fully understand the necessity of the sealing washer and o-ring for a BSPP fitting. If you as a paying customer could not convince them, then I doubt a non-customer like myself could. Have you talked to Mark himself?

 

[rjkobbeman]

With all due respect, I don't need to call them. I did not buy my HTL from them and I fully understand the necessity of the sealing washer and o-ring for a BSPP fitting. If you as a paying customer could not convince them, then I doubt a non-customer like myself could. Have you talked to Mark himself?

I didn't suggest you call them so I could prove you wrong or I felt you had to. I suggested you call them so you could help us less knowledgeable out. CCM has already on two separate occasions said no washer nor o-ring is used. Although I understand the different types of British Standard fittings, I don't have enough experience with them to argue your points. All I can do is agree with them -- although it goes against what I have learned.

I thought your HTL was a CCM unit as well.

 

[rjkobbeman]

Maybe this will help explain some things.

British Pipe Standard fittings are amongst the most popular of all foreign threads in the world today. These threads come in two versions: parallel (BSPP), and tapered (BSPT). The thread flank angle for both tapered and parallel British threads is 55ｰ. NOTE: It is a fairly common mistake to identify a BSPT (tapered) as an NPT. Always remember that NPT threads have a 60ｰ thread flank angle, and BSPT has a 55ｰ angle (this can be verified with a thread gauge). Although BSP is a foreign thread, it isn稚 actually metric. This is why it comes in imperial sizes: 1/8, 1/4, 1/2, 3/4, and so on.

BSP parallel threads commonly seal via a 30ｰ chamfer on the male thread to a 30ｰ recessed cone inside the female thread (swivel only). If it is a port application, an O-ring and washer or a bonded washer are needed to achieve a proper seal for parallel threads. For tapered BSP threads, a seal is acquired via thread wedging with additional support from thread dope or Teflon tape. As previously mentioned, it is possible for a male BSPT (tapered) to thread into a female BSPP (parallel), so long as the female thread is fixed and not swivel (this is because of the recessed cone seat).

Even after reading post #22. some people still doubt common logic. If there is a cone and a recessed cone, seems like it works similar to JIC connections. Metal to metal. No stinking o-ring needed . Just my view point.

I'm not doubting anyone, I'm just trying to understand it all. I know the difference between tapered and parallel threads. My fittings do not have the cone style you mention. But yet the manufacturer of my HTL says no washer. You say this is common logic, but when two supposedly experts disagree the non-experts are simply confused.

 

[rjkobbeman]

If it is a BSPP fitting screwing into a port, it definately needs a bonded seal. If it seats by the internal cone, no bonded seal required. IMHO, it's not worth the aggravation of going thru CCM. Just go to a hose shop and pick up what you need.

CCM said it WILL leak if you try to use a washer. There is a recess where the fitting screws into the block... and if you use a washer it doesn't appear it will seal in that recess.