(978)686-6332 sales@nedc.com

low compression set gasketsCompression set with gaskets is a constant concern because it eventually creates sealing issues with the interface of the gasket and the surface it is being pressured against. Compression set is a concern because the gasket will lose thickness and lose its ability to fill the gap. It is not always evident immediately that thickness is being lost as temperature cycling goes on with a gasket.

极速飞艇平台

Compression set is defined as what percentage of the original height of the material does the material return to after it has been subject to compression in a certain environment. For example, an .125’’ piece of gasketing material is compressed 50% to .063’’. After removal of the fixture, it stays at .099’’. That would be a compression set of 42%. 

Zero Percent Compression Set would be the material returned to its original height.

One Hundred Percent Compression Set would be the material stayed at whatever percentage it was compressed to. 

When testing for a compression set, the lower the number, the better. In the gasket industry, a compression set of below 25% is pretty good. However, there are some gasketing materials that standard apart from that. Anything below 10% I would consider excellent compression set resistance. This is what this blog is about.

极速飞艇龙虎开奖结果

There are three highly used standards for testing materials for compression set:

极速飞艇网页计划

ASTM D395 is the recognized authority on compression set for harder gasketing material that is commonly rubber.

极速飞艇开奖

There are two specifications that are used often in the foam/sponge testing arena. ASTM D1056, and ASTM D3574 are the most commonly used. These are the recognized authorities for compression set for softer materials such as foam/sponge rubber materials. 

极速飞艇注册

Silicone rubber products, and Urethane Foam are some of the most notorious for their low compression set values. In the charts below we demonstrate some of those values.

极速飞艇开奖视频直播

Product Compression Set % Max Requirement stated per their datasheet Type of Product
Rogers Corporation HT-800, HT-820, HT-840, HT-870 <5% 22 hours @ 212°F ASTM D1056  Silicone Foam
Saint Gobain R10480S <5% 22 hours @ 212°F ASTM D1056  Silicone Sponge
Saint Gobain R10480M <5% 22 hours @ 212°F ASTM D1056  Silicone Sponge
Saint Gobain F12 <5% 22 hours @ 212°F ASTM D1056  Silicone Foam
Poron® 4701-30 <10% ASTM D3574 Test D 158°F Urethane Foam
Poron® 4701-40 <10% ASTM D3574 Test D 158°F Urethane Foam
Poron® 4701-50 <10% ASTM D3574 Test D 158°F Urethane Foam
Poron® 4701-60 <10% ASTM D3574 Test D 158°F Urethane Foam

极速飞艇计划网址

Product Compression Set % Max Requirement stated per their datasheet Type of Product
Saint Gobain Norseal  9030 15% 70 hours @ 302°F ASTM D395 Method B Silicone Rubber
Saint Gobain Norseal  9040 15% 70 hours @ 302°F ASTM D395 Method B Silicone Rubber
Saint Gobain Norseal 9050 15% 70 hours @ 302°F ASTM D395 Method B Silicone Rubber
Saint Gobain Norseal 9060 20% 70 hours @ 302°F ASTM D395 Method B Silicone Rubber
Saint Gobain Norseal 9070 20% 70 hours @ 302°F ASTM D395 Method B Silicone Rubber

For more information on low compression set gaskets, please contact sales@nedc.com.

Share this Article:
极速飞艇微信群 SG飞艇历史结果 快乐飞艇开奖号码 秒速赛车开奖号码 澳洲幸运8开奖人工计划 快乐飞艇人工计划公式 澳洲幸运103期计划 极速赛车人工计划