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!important;background-color:white;} No I sure it's not the outlet for the air
line is high in the body of the valve and is a 1" NPT connection.
I recall several similar designs for the alarm port in other DPV the old
Automatic model 39 worked the same way as I recall slim slots in the seat. On
major difference is that with external reset there is no need to open the
valve. Resetting none external requires the removal of the hand hole cover
which would allow a visual inspection on the conditions internally. If a lot of
junk brought in by water flow one would see it and carefully clean the seat
ring. External reset allows the release of the clapper assembly and in my view
would trap anything small enough not to interfere with seating the air and
water seal, perhaps over the water alarm inlet holes.
I have never been a big fan of external reset valves primarily because if
resetting is done by an untrained person you run the risk of trapping a column
of water above the clapper.
This condition could slow or even prevent the valve from operating if the water
column elevation is sufficient to hold down the clapper. That's why Potter
developed the water column switch.
Sorry for the rant.
MC
Sent from Yahoo Mail for iPhone
On Wednesday, May 18, 2016, 5:11 PM, Bruce Verhei <[email protected]> wrote:
Is the low air switch affected by this design?
On May 18, 2016, at 13:46, rongreenman . <[email protected]> wrote:
Curiouser and curiouser. I'm currently doing piece of work in s large food
distribution center. There's a fitter along to play with the toys and all I
do..., well, let's just say not too much.
I mentioned this discussion to him and he nodded with that " Ifeel you
brother" look and said they're clogged a lot.
On Wednesday, May 18, 2016, Charles Thurston <[email protected]> wrote:
Hello rongreenman,
Nope it is in the casting for the body.
Wednesday, May 18, 2016, 12:38:06 AM, you wrote:
> So not the Tee, Charles?
> On Tue, May 17, 2016 at 8:37 PM, Charles Thurston <[email protected]> wrote:
> Hello rongreenman,
>
> The restriction is in the casting for the body of the valve. I have seen it
>and warned my guys to be very careful cleaning the seats.
>
> Tuesday, May 17, 2016, 9:38:12 PM, you wrote:
>
>> I'm surprised that something this unusual isn't even listed as a special
part on the cut sheets. They just say ¾" x whatever x whatever. Purpose of the
restriction?
>
>
>> Talk to Tyco.
>
>> On Tue, May 17, 2016 at 6:35 PM, Scott Futrell <[email protected]> wrote:
>
>> Ron,
>> Nope, it’s designed that way. I’ve asked fitters to look, and I’ve looked
at new ones off the truck. That’s the way it comes. Data sheet doesn’t show it,
or say anything about it.
>> Nope.
>> I’m thinking most don’t realize this, and most don’t realize wiping off the
seat pushes the gunk into the slot that leads to the two holes.
>> Scott
>> Office: (763) 425-1001 x 202
>> Cell: (612) 759-5556
>> From: Sprinklerforum
[mailto:[email protected]] On Behalf Of
rongreenman .
>> Sent: Tuesday, May 17, 2016 8:31 PM
>> To: [email protected]
>> Subject: Re: Tyco Dry Pipe Valve
>> Maybe just a bad casting. Nothing about that in the cut sheet and that
would be some neon flashing sign if there was a special tee in the alarm line.
>> Have you talked to Tyco?
>> As an example of this Viking has special ball drips that work only on
designated valve trims. One that will not work with a DPV may be for a deluge
valve.The info for this is glaring when you actually go looking for it.
http://www.vikinggroupinc.com/databook/checkvalves/062289.pdf
>> _______________________________________________
>> Sprinklerforum mailing list
>> [email protected]
>>
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>
>
>
>
>
>
>
>
> --
> Best regards,
> Charles mailto:[email protected]
>
> _______________________________________________
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>
--
Best regards,
Charles mailto:[email protected]
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