Material for Sealing: O-Rings & Shaft Seals for Marine Use

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    Material Sealing
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Discussion Overview

The discussion revolves around selecting appropriate sealing materials, specifically o-rings and shaft seals, for equipment intended for use on seagoing ships. The focus is on the requirements for resistance to seawater, temperature tolerance, and chemical resistance in lubricants.

Discussion Character

  • Exploratory
  • Technical explanation
  • Debate/contested

Main Points Raised

  • One participant requests assistance in choosing sealing materials that can withstand specific environmental conditions, including seawater exposure and a temperature range of -32 ° to + 60 °.
  • Another participant inquires about the type of equipment for which the sealing material is needed, seeking clarification on the application.
  • A later reply specifies that the equipment in question is a gearbox that will be continuously installed on naval ships.
  • One participant mentions that reputable marine gear manufacturers typically provide seals for their products, questioning the need for independent selection of sealing materials.
  • Another participant expresses concern about the use of non-marine equipment on ships, suggesting that there may be more context to the situation that has not been shared.
  • A participant references Parker-Hannifin as a source for various polymer materials used in o-rings, directing the original poster to their website for further information.

Areas of Agreement / Disagreement

Participants express differing views on the necessity of selecting sealing materials independently from manufacturers, with some questioning the rationale behind the original poster's request. The discussion remains unresolved regarding the appropriateness of the equipment being used and the implications of using non-marine components.

Contextual Notes

There are limitations in the information provided, including the lack of details about the specific Navy contract and the overall context of the equipment's use aboard the ship.

pierre.sabiy
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Hello,
I would need help. Need help choosing the material for sealing: o-ring, shaft seal. They will use the equipment that will be installed on board a seagoing ship.
The conditions are:
- Resistant to seawater
- Withstand temperatures of -32 ° to + 60 ° or -25 ° to + 60 °
- And chemical resistant in gear, i grease, oil,
Bendzin, ...

For each of your advice thank you.
 
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For what sort of equipment do you need this seal material?
 
SteamKing said:
For what sort of equipment do you need this seal material?
It's the gearbox that will be 24 hours (thus still) installed on board naval ships.
 
pierre.sabiy said:
Hello,
I would need help. Need help choosing the material for sealing: o-ring, shaft seal. They will use the equipment that will be installed on board a seagoing ship.
The conditions are:
- Resistant to seawater
- Withstand temperatures of -32 ° to + 60 ° or -25 ° to + 60 °
- And chemical resistant in gear, i grease, oil,
Bendzin, ...

For each of your advice thank you.

Pierre,

Parker-Hannifin makes a wide variety of o-rings from different polymer materials. You can look at the properties of the various polymeric materials they use on their website:

http://parker.com/portal/site/PARKE...1127&vgnextcat=O-RING+ELASTOMERS&Wtky=O-RINGS
 
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pierre.sabiy said:
It's the gearbox that will be 24 hours (thus still) installed on board naval ships.
Most of the reputable marine gear manufacturers already provide seals for their products.

I'm curious as to why you are doing something which should have already been done by the manufacturer.
 
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This is not a marine gearbox. This gearbox is placed on board the ship (is not below deck).
 
pierre.sabiy said:
This is not a marine gearbox. This gearbox is placed on board the ship (is not below deck).
Navies are usually pretty careful about substituting non-marine equipment for items designed for use aboard ship.

I don't know what this exercise is all about, but I get the sense that there is a lot more to this story than you have shared...
 
Thread closed temporarily for Moderation. @pierre.sabiy -- send me a personal message with more information about this system, and information about what Navy contract you are working under.
 

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