Can I use black O-rings for AC?
Black o rings are most commonly used for auto air conditioning applications. Green o rings are hydrogenated Nitrile, also known as highly saturated Nitrile, or more commonly known as HNBR.
What are the types of O-rings?
O-Ring Materials and Types
- Nitrile (Buna-N)
- Ethylene Propylene Rubber (EPR)
- Fluorocarbon (Viton)
What do O-ring colors mean?
Across the rubber industry, O-rings are not color coded. Many customers adopt a method of color-coding to help prevent mixed seal inventory. Seal materials cannot be conclusively identified by color.
What are nitrile O-rings used for?
Nitrile o-rings are a popular type of rubber seal gasket that’s used in a wide range of applications and environments – they’re broadly seen as a general-purpose o-ring type, with reasonably resistant sealing properties against water, gasoline, petroleum oils, crude oil, propane and some hydraulic fluids.
Can I use nitrile O-rings for AC?
A better type of O-ring for air conditioning applications is HNBR which stands for Hydrogenated NBR (sometimes called Hydrogenated Nitrile, or Highly Saturated Nitrile Rubber, or HNB). The compatibility of HNBR with Mineral oil, PAG, POE, R-12, R-134a, R-1234yf is very good.
What is the most common O-ring material?
Due to many applications, there is also a wide variety of O-ring material choices available. Nitrile (Buna), Neoprene, Ethylene Propylene (EPDM Rubber), Silicone, Fluorocarbon (Viton), and PTFE (Teflon) are among the most commonly used compounds for O-rings and seals.
What Colour is Viton?
|O-Ring Color||O-Ring Material|
|Green||Viton® | HSN/HNBR|
|Red (Rust)||Silicone | TES/PFAS|
What is the difference between Viton and nitrile O-rings?
The key difference between nitrile and Viton is that nitrile rubber compounds have comparatively a low density while Viton has comparatively a large density. However, by looking at the material, we can identify Viton by its appearance of green-brown colour where nitrile rubber has a yellow colour.
Is nitrile rubber same as EPDM?
The key difference between NBR and EPDM is that NBR is a non-aromatic polymer compound, whereas EPDM is an aromatic polymer. Moreover, NBR is made using acrylonitrile and butadiene monomers, while EPDM is made using ethylene, propylene and a diene comonomer.
Is Viton same as EPDM?
Viton® rubber is a fluoro elastomer, whereas epdm rubber is ethylene-propylene-diene-monomer. The primary differences between Viton® and EPDM is in their chemical resistance and temperature ranges. Both have different properties and applications for general industrial use.
Is PTFE better than EPDM?
Reduced fouling and cleaning frequency: PTFE membranes can help slow the rate of membrane fouling, often by a factor of five to 10 when compared with EPDM membranes. This advantage occurs because of the nonstick properties of PTFE, which make it hard for organic matter to adhere to and accumulate on the PTFE surface.
What is the difference between Viton and Buna O-rings?
Viton is the choice over Buna for high-temperature applications. Viton seals hold indefinitely at temperatures up to 400°F and can last up to 48 hours at temperatures up to 600°F. Buna is effective to 250°F. However, it can effectively seal mechanical objects at low temperatures to –22°F.
What are the different types of O rings?
Mechanical Seals O Rings Nitrile (NBR) O-Rings EPDM O-Rings Fluorocarbon (FKM) O-Rings Silicone (VMQ) O-Rings Perfluoroelastomer (FFKM) O-Rings
What are the different types of O-ring materials?
O-Ring Materials and Types 1 Nitrile (Buna-N) 2 Ethylene Propylene Rubber (EPR) 3 Fluorocarbon (Viton) 4 Neoprene 5 Polyurethane 6 Silicone 7 PTFE 8 FFKM 9 Ethylene Propylene (EPDM) 10 Fluorosilicone
What factors should be considered when choosing O-ring materials?
Primary considerations for O-ring material selection include chemical compatibility, application temperature compatibility, sealing pressure, durometer, size and cost. Depending on the application, factors such as electrical properties, dynamic resistance, tear resistance and ozone resistance should also be considered.
What kind of O-rings do you use for hydraulic fluid?
Ethylene Propylene Rubber (EPR) O-rings. Unlike Viton® O-rings, Ethylene Propylene Rubber (EPR) O-rings are suitable for use with corrosive Skydrol hydraulic fluid, as well as steam, water, silicone oils, brake fluids and alcohols. This material is known to display good heat and compression resistance.