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O Ring Backup Ring
O RING BACKUP RING : LEVIAN RUBY RINGS : STAINLESS STEEL ENGAGEMENT RING.
- relatively hard, high modulus ring placed in the gland between the O-ring and the groove side walls, to prevent extrusion of the seal into the clearance gap; also known as an anti-extrusion ring or device.
- a device made of rubber, PTFE, leather, or another substance that will add strength or support when installed next to a seal. Most commonly used as an anti-extrusion device.
- Used to bridge a clearance and minimize extrusion of a seal when cylinder barrel circumferentially expands or when differential pressure across seal is high. It must not collapse or cold flow and IS sometimes known as an "anti-extrusion ring."
This PTFE O-ring is white in color, has a durometer of 55D, a round cross-section, and is designed for use in a wide variety of sealing applications.
PTFE has excellent heat, fuel, and chemical resistance and is acceptable for temperature applications between -328 degrees F (-200 degrees C) to 500 degrees F (260 degrees C). It can be used outdoors, with lubricants, hydrocarbons, acids, alkalis, detergents, alcohol, ketones, steam and refrigerants, and also has good electrical resistance. PTFE is vulnerable to high vacuum seals, low compression vacuum sealing flanges, and super-heated steam.
This PTFE O-ring has a shore durometer of 55D. Shore durometer is the hardness of a material, and its resistance to permanent indentation. A higher durometer value indicates greater resistance to indentation on a scale of 0 to 100, with 100 indicating no indentation.
O-rings commonly provide a pressure and fluid seal between cylindrically shaped, overlapping mating surfaces and are commonly seen in engines, faucets, flanges, valves and various cylinders. They are circular in shape, with a round cross section and a hole in the center, similar to a doughnut. O-rings are available in various sizes, and can be ordered based on required nominal inside diameter (ID), outer diameter (OD), and cross-sectional (CS) diameter.
This PTFE O-ring meets standards defined by Aerospace Standard AS568A, which is the Aerospace Size Standard for O-rings.
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Gear History and current gear(Jan 2011)
Sadly, I don't have a backup to take a pic of my gear with so I had to use my phone camera =/
The only thing that I still have since starting photography is my 50mm =O
former Gear:
Nikon D90
Nikon D80
Nikon 70-300mm f-- VR AFS
Nikon 80-200mm f/2.8 2 Ring
Nikon Sb-600
Nikon 85mm f/1.8D
Tamron17-50 f/2.8
Sigma 18-200mm f-- non os (First lens ever!!!)
Sigma 105mm f/2.8 macro
Sigma 10-20mm f--
yes I recycled through alot of gear.
why is it so difficult to photograph one's earlobe?
The other morning one of my 6 gauge earrings slipped out in the shower. It bounced and clanged against the ceramic tub a few times before sliding down the drain. So much for that pair. I should have known they wouldn't stay in place without o-rings, despite the seller's assurances. Thankfully I found my backup pair. They're made of wood and they don't feel like they're going anywhere. I hope.
o ring backup ring
This PTFE O-ring is white in color, has a durometer of 55D, a round cross-section, and is designed for use in a wide variety of sealing applications.
PTFE has excellent heat, fuel, and chemical resistance and is acceptable for temperature applications between -328 degrees F (-200 degrees C) to 500 degrees F (260 degrees C). It can be used outdoors, with lubricants, hydrocarbons, acids, alkalis, detergents, alcohol, ketones, steam and refrigerants, and also has good electrical resistance. PTFE is vulnerable to high vacuum seals, low compression vacuum sealing flanges, and super-heated steam.
This PTFE O-ring has a shore durometer of 55D. Shore durometer is the hardness of a material, and its resistance to permanent indentation. A higher durometer value indicates greater resistance to indentation on a scale of 0 to 100, with 100 indicating no indentation.
O-rings commonly provide a pressure and fluid seal between cylindrically shaped, overlapping mating surfaces and are commonly seen in engines, faucets, flanges, valves and various cylinders. They are circular in shape, with a round cross section and a hole in the center, similar to a doughnut. O-rings are available in various sizes, and can be ordered based on required nominal inside diameter (ID), outer diameter (OD), and cross-sectional (CS) diameter.
This PTFE O-ring meets standards defined by Aerospace Standard AS568A, which is the Aerospace Size Standard for O-rings.
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Post je objavljen 31.08.2011. u 12:01 sati.