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IFR Shoe Seal

Monday, July 10, 2017   By: Kumaran [1861] 1 Stars
What is the different between scissor H shoe seal and scissor V shoe seal.
Is there any specific advantage for both seal.

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Monday, July 10, 2017   By: davidr@fast.net [39] 5 Stars
These sound like brand names - what manufacturers are they from, can you point to URLs for their cut sheets? Many shoe seals are similar, some have sometimes slight advantages. Finding the one that suits your conditions requires you to ignore the sales pitches and look at the details. EFR, IFR, product, welded or riveted tank, tank within tolerances or not, materials of construction, cost, ease of installation, warranty, etc...

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Tuesday, July 11, 2017   By: Dunedin [37] 4 Stars
Essentially similar. The H Type has the pressure points on the shoe plate in a horizontal plane and the V Type has the pressure points on a vertical plane. This is not as important as the number of pressure points on each shoe plate - the more the better.

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Tuesday, July 11, 2017   By: davidr@fast.net [39] 5 Stars
Or, choose a design without pressure points - they wear prematurely and dont spread the force onto the shoe uniformly.

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Tuesday, July 11, 2017   By: archer [509] 2 Stars
Kindly give us more information on seals without pressure points . Thanks in Advance
Archer

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Tuesday, July 11, 2017   By: Dunedin [37] 4 Stars
I suspect that what David means is a seal with a continous pressure and in this category would be the Tube Seal either Foam Log or Liquid Filled Seal.

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Wednesday, July 12, 2017   By: davidr@fast.net [39] 5 Stars
I am referring to a hoop type spring that at least two aluminum floating roof manufacturers use. In plan it looks like this.



Click on picture for full size view or to view PDF!

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Thursday, July 13, 2017   By: Dunedin [37] 4 Stars
I have not seen this type of seal configuration before but would probably put it into the H Type category.

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Thursday, July 13, 2017   By: Archer [509] 2 Stars
Thanks a ton Sir!

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Thursday, July 20, 2017   By: Archer [509] 2 Stars
Dear Mr. David,
Will be obliged to learn how to design the Hoop Spring
Thanks in advance
Archer

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Saturday, July 22, 2017   By: davidr@fast.net [39] 5 Stars
The design is proprietary, was developed over some time starting with a general idea of how much force and movement was needed, then trying different materials and sizes and configurations until the criteria were achieved and proven with high cycle testing. Its not hard really, takes time and the willingness to experiment. The resulting design has been used for about 20 years, with great success. Your situation is probably different enough that youd want to make your own.

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Monday, July 24, 2017   By: Archer [509] 2 Stars
Thanks Sir!

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Featured
Honeycomb Panel IFR
By: davidr@fast.net [39]

Honeycomb panels used on internal floating roofs are a sandwich construction consisting of an upper and lower skin with core in between. The materials are most often aluminum. In this scenario, the core is usually 0.003 thick aluminum foil expanded to a six sided shape similar to what bees make in their hives, hence the name honeycomb. The top and bottom skins are 0.16 minimum, sometimes as thick as 0.040. The core may be of solid aluminum foil or it may have perforations. The perforations ....   Read All
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