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Sea Cocks
Should sea cocks (under the water line) be ball valves or gate valves?
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#2
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Sea Cocks
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Hash: SHA1 On Thu, 08 Jan 2004 05:44:34 GMT, John Smith wrote: Should sea cocks (under the water line) be ball valves or gate valves? Never gate valves, above or below the water line. Gate valves break, they can easily jam in the open position, they give little or no indication of if they are open, closed or some point inbetween. They are rarely made of suitable material for salt water environments, and they cost no less than a decent quality ball valve. If it's for a through hull, gate valves lack the support for bolting through. You can sort of get away with them for internal stuff, but you are better off with ball valves for that too. The 1/4" bronze ones at Ballard Hardware are about $6 each, and the SS ones, are ~$18 iirc. -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.2.4 (GNU/Linux) iD8DBQE//Qxpd90bcYOAWPYRAgyqAJ9Vbi524IPdMe6ZE5RncYpucZbryQC g7zOs mNmZXDFWHP64c2VkzyGN6Cc= =1TU4 -----END PGP SIGNATURE----- -- Jim Richardson http://www.eskimo.com/~warlock |
#3
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Sea Cocks
-----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA1 On Thu, 08 Jan 2004 05:44:34 GMT, John Smith wrote: Should sea cocks (under the water line) be ball valves or gate valves? Never gate valves, above or below the water line. Gate valves break, they can easily jam in the open position, they give little or no indication of if they are open, closed or some point inbetween. They are rarely made of suitable material for salt water environments, and they cost no less than a decent quality ball valve. If it's for a through hull, gate valves lack the support for bolting through. You can sort of get away with them for internal stuff, but you are better off with ball valves for that too. The 1/4" bronze ones at Ballard Hardware are about $6 each, and the SS ones, are ~$18 iirc. -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.2.4 (GNU/Linux) iD8DBQE//Qxpd90bcYOAWPYRAgyqAJ9Vbi524IPdMe6ZE5RncYpucZbryQC g7zOs mNmZXDFWHP64c2VkzyGN6Cc= =1TU4 -----END PGP SIGNATURE----- -- Jim Richardson http://www.eskimo.com/~warlock |
#4
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Sea Cocks
Never gate type, always 1/4 turn somethings, barrel, ball, tapered
plug, etc, Also, always, a proper flanged base seacock with a backing pad and ball drain, not an inline valve attached to a thruhull spud. Conbraco, Groco, Perko, Forespar etc. On Thu, 08 Jan 2004 05:44:34 GMT, "John Smith" wrote: Should sea cocks (under the water line) be ball valves or gate valves? |
#5
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Sea Cocks
Never gate type, always 1/4 turn somethings, barrel, ball, tapered
plug, etc, Also, always, a proper flanged base seacock with a backing pad and ball drain, not an inline valve attached to a thruhull spud. Conbraco, Groco, Perko, Forespar etc. On Thu, 08 Jan 2004 05:44:34 GMT, "John Smith" wrote: Should sea cocks (under the water line) be ball valves or gate valves? |
#6
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Sea Cocks
As others have stated, Gate Valve are not suited for marine use and
especially for below the waterline. However, IMHO, the plug valve is superior to the ball valve. The plug valve can be taken apart and cleaned or repaired. It seems that they would be cheaper to manufacture as well.. Steve s/v Good Intentions |
#7
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Sea Cocks
As others have stated, Gate Valve are not suited for marine use and
especially for below the waterline. However, IMHO, the plug valve is superior to the ball valve. The plug valve can be taken apart and cleaned or repaired. It seems that they would be cheaper to manufacture as well.. Steve s/v Good Intentions |
#8
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Sea Cocks
Steve wrote:
As others have stated, Gate Valve are not suited for marine use and especially for below the waterline. However, IMHO, the plug valve is superior to the ball valve. The plug valve can be taken apart and cleaned or repaired. It seems that they would be cheaper to manufacture as well.. Agreed. Good plug valves are hard to find, though. One of the chief benefits is that you can disassemble them without taking apart the piping, something that can't be done with ball valves. Also, if they happen to freeze up, they are easier to unfreeze. I looked all over for plug valves to replace some seacocks on our boat last spring, and couldn't find any that we could actually get in time. However, at some boatyard session in the not-too-distant future I have to replace (upsize) two seacocks and intend to have plug valves on hand for that job. Fresh Breezes- Doug King |
#9
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Sea Cocks
Steve wrote:
As others have stated, Gate Valve are not suited for marine use and especially for below the waterline. However, IMHO, the plug valve is superior to the ball valve. The plug valve can be taken apart and cleaned or repaired. It seems that they would be cheaper to manufacture as well.. Agreed. Good plug valves are hard to find, though. One of the chief benefits is that you can disassemble them without taking apart the piping, something that can't be done with ball valves. Also, if they happen to freeze up, they are easier to unfreeze. I looked all over for plug valves to replace some seacocks on our boat last spring, and couldn't find any that we could actually get in time. However, at some boatyard session in the not-too-distant future I have to replace (upsize) two seacocks and intend to have plug valves on hand for that job. Fresh Breezes- Doug King |
#10
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Sea Cocks
Wow. Live and learn. I have no clue what a plug valve is, but I like
the sound of it. Off to Google I go. R. On Thu, 08 Jan 2004 12:44:16 -0500, DSK wrote: Steve wrote: As others have stated, Gate Valve are not suited for marine use and especially for below the waterline. However, IMHO, the plug valve is superior to the ball valve. The plug valve can be taken apart and cleaned or repaired. It seems that they would be cheaper to manufacture as well.. Agreed. Good plug valves are hard to find, though. One of the chief benefits is that you can disassemble them without taking apart the piping, something that can't be done with ball valves. Also, if they happen to freeze up, they are easier to unfreeze. I looked all over for plug valves to replace some seacocks on our boat last spring, and couldn't find any that we could actually get in time. However, at some boatyard session in the not-too-distant future I have to replace (upsize) two seacocks and intend to have plug valves on hand for that job. Fresh Breezes- Doug King |
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