Thanks Jay,
Lined SS valves ? These butterfly valves that we use
here on the farm are usally a cast iron body with a metal disk ( the
"butterfly") in the middle for the shut off device. There is rubber around
the disk as well as rubber around the perimeter of the mating opening of the
cast iron valve body. It would be easy enough to replace the metal disk
with stainless and maybe I could epoxy the cast body. or possibly find a
bronze one.
Brian
> -----Original Message-----
> From: owner-personal_submersibles@psubs.org
> [mailto:owner-personal_submersibles@psubs.org] On Behalf Of Jay K.
> Jeffries
> Sent: Saturday, January 03, 2009 5:49 PM
> To: personal_submersibles@psubs.org
> Subject: RE: [PSUBS-MAILIST] Soft ballast venting valve
>
> Brian,
> Ball valves typical get tight from not operating the valve on at least a
> scheduled basis. Care has to be given that sand and/or calcite deposits
> occur in the valve which can damage the sealing surfaces or scratch the
> ball. Butterfly valves may be an option as they have a limited capability
> to throttle flow where ball valves tend to be all or nothing (100% flow or
> 0%). Butterfly valves can also be affected by sand and calcite deposits.
> Butterfly valves are available in SS but are very pricey when found.
> Another option to contain costs is to use SS lined valves vs. a complete
> body of SS.
> R/Jay
>
> Respectfully,
> Jay K. Jeffries
> Andros Is., Bahamas
>
> As scarce as the truth is, the supply has always been in excess of the
> demand.
> -Josh Billings
>
>
>
>
> _____________________________________________
> From: owner-personal_submersibles@psubs.org
> [mailto:owner-personal_submersibles@psubs.org] On Behalf Of Brian Cox
> Sent: Saturday, January 03, 2009 8:39 PM
> To: Personal_Submersibles@Psubs. Org
> Subject: [PSUBS-MAILIST] Soft ballast venting valve
>
>
> Happy New Year All,
> Does anybody have a suggestion for a ballast venting valve for a soft tank
> ( my ferro structure ) that is around 1 1/2" diameter or maybe 2" , I
> will most likely use a stainless ball valve but I'm worried that
> eventually it is going to sieze up on me. It seems like those ball valves
> get awfully hard to turn after a while. The butterfly valves that I've
> seen ( for farm irrigation ) seem to turn easier , but I haven't seen them
> in stainless.
> Thanks
> Brian, Ventura, CA
>
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