circulator gaskets

hr

I was in the brass flange business I had 5000 flange gaskets manufactured. I contacted a gasket manufacture and gave them the spec for the gasket I needed.

I choose the two hole flat gasket as it fit a wide variety of pumps with the same two hole spacing.

I have used these for over 12 years now. I believe they are an EPDM type product. Sticking never seems to be a problem? I suppose a thin Permatex gasket sealer may prevent this, although it would make it slip easier, perhaps.

A pocket knife is usually all that you need to clean up the pump and flange surfaces.

I have used the combo of the ring gasket and flat gasket sometimes. Some pump brands have a thick groove that does not allow a flat gasket much sealing surface area. For this a ring and two hole covers you nicely.

I have seen some red colored flat gaskets also. Seem to be thicker and a different type of material. Clean burn sends these with their boilers.

hot rod

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archibald tuttle

circulator gaskets

Just looking for all the wives tales on preference for o-ring vs. flange cutout style gaskets. And whether there is a source for 'better' gaskets as far as the drying and stiffening of the material as well as not-sticking to the flange.

One supposes that sticking to the flange isn't counterproductive to the extent it bewcomes the 'seal' once the gasket has dried out and lost expansive resilience.

I have had reasonable success with both styles of gaskets, but always felt that materials science in this area does not seem to have progressed since circulators were first installed in heating systems.

Is there any miracle gasket conditioner or the like that anyone use to prevent sticking to the flanges?

I have to regasket a couple of 0012s which have had the original ring gaskets supplied with them and my local supplier doesn't carry that gasket and recommends just using the flat flange cutout. The 0012 rings, being thicker in all dimensions than those for the smaller bodied circulators similar to the 007 are pretty beefy and I think I might choose the rings style if I had a choice.

any deductive or intutive thoughts appreciated.

Brian

PS Is there a links page with industry web sites in here somewhere. would that be the "virtual trade show"?

Michal

had similar problems

with the 012 circs. I like the small circular gaskets on anything up to the 007, anything after that I like the heavier flat 2 hole gasket, seems to hold better. Sometimes I will make my own from a piece of flat red rubber gasket material, but thats only in extreme casses and emergencies. I always like to put a little blue block on the gaskets before mating them to the circ and flange, I feel it gives a little bit better seal.

Jaitch

Blue Block

Also makes a nice "adhesive" to stick the gasket to the circ body if you need to "jump" one in (in a hurry) and don't have much time to fool with gasket/flange alignment issues. This trick seems to work well on BOTH types of gaskets

- JAITCH

c.t.kay

gaskets

try allstate gasket company on long island.they make all kinds of gaskets from many different materials.

Craig Machamer

circulator gaskets

Brian,

Ever tried Gore-Tex Joint Sealant (or the generic, economy-grade expanded PTFE)? I've been using this stuff for about 15 years, and on just about everything from water to oil to high-pressure steam. It comes on a roll in a variety of widths (usually from 1/8" up to 1") with an adhesive strip and peel-off backing. Just peel-off the backing, stick it to the flange gasket surface and overlap the ends. Once you've used it, there's no turning back, or getting called back to replace a leaking gasket. You should be able to find it at a local industrial piping supply house, or you can get it from M.S.C. Industrial Supply Co., Inc. (mscdirect.com). One word of caution: Never cover more than 1/2 the width of the gasket surface. In other words, "less is more" when it comes to using Gore-Tex Joint Sealant.

Joe Mattiello

Flange gaskets for 00 series

The taco, 00 uses epdm elastomer o-ring type gaskets on all the 00 including the 0012, standard and the 0012-1 with the 2" flange. Taco did use the large flat red gasket on the 1600 series, including the 0012-1. However, in some cases the gaskets would take a permanent set, and with the materials expanding and contracting, Taco decided to change over to the o-ring type even on the 1600 series.

Taco, Inc.
Joe Mattiello
Technical Service Technician
joemat@taco-hvac.com
401-942-8000 X 484
www.taco-hvac.com

bob_44

Ring Gaskets

Most of the ring gasket that I have seen are improperly installed. It seems everyone THINKS the flange bolts should be drawn down tight, WRONG! One of the main design features of the thick square section ring gasket is vibration isolation, if you crank it down until the flanges almost touch you loose that function plus you distort the heck out of the gasket. It is more likely to leak tight than just snugged up. Of course I'm assuming it is properly piped and supported. There should never be any strain or load on a pump and of course the flanges have to be square with the pump. Properly installed ring gaskets require no sealants. bob

Al Corelli

Doesn't the vibration just travel through the load clamping surfaces of the bolts? Or are you saying that certain harmonics may not be transmitted through the cross section of the o-ring?

Bruce M.

Taco O-ring gaskets are my choice

They are available from Taco and your supplier can order them. The flange type gaskets tend to harden and are not always easily removed. I have never seen a factory Taco O-ring that did not come out easily. A question for Joe from Taco: Is there a torque value for the bolts on the circulator?

Weezbo

here is a thought....

I put a dab of Industrial blue magic on one side of the gasket or a bad of grip or permatex on one side,in order that one side will stay stuck when you remove the pump from the flanges....or i use a round gasket and a eyeball gasket...with a dab of blue magic on the gasket.
By not over tightening the gasket or a union you allow a place for a leak that you can immediately control with a couple of wrenches ....and you can be relatively certain that there is fluid at the pump...*~/:)

hr

Excellent point, weezer

any circ with intergral flow checks really need to be burped to assure that circ starts up with fluid at the seal. Letting a squirt out of the flange gasket is a wise thing to do

hot rod

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