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Warning
WARNING

Designers of modern SCUBA equipment often specify O-rings with special properties and materials for specific uses inside their equipment. The special o-rings are supplied as part of original equipment manufacturer (OEM) service parts kits. Substituting any other generic O-ring just because it's the right size can cause difficult-to-diagnose problems and degrade performance. Improper service could cause a failure which would have serious and life threatening consequences.


> Genuine Viton O-Rings for SCUBA
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> Genuine Viton O-Rings for SCUBA URL for this product

We stock a variety of DuPont Performance Elastomers Viton® brand O-rings suitable for use in SCUBA applications.

Sizing -- Society of Automotive Engineers AS568B is an Aerospace Standard that specifies sizes for O-rings used in sealing applications. An AS568B number is a three-digit suffix that identifies the O-ring's size. Technically, an O-ring size is listed as AS568B-016, AS568B-112, etc., but most people use just the three-digit number. The first digit denotes the O-ring cross section width: 0xx = 1/16-inch, 1xx = 3/32-inch, 2xx = 1/8-inch. While it might seem convenient to provide a picture sizing chart, we've never seen an online version that could be reproduced exactly in a Web browser. Also, sizing an existing O-ring that has been in service can be error prone because O-rings can take a set that changes their dimensions enough to be misleading. Luckily, the sizes used in 'user servicable' SCUBA applications are fairly regular, so it's probably best to choose the size based upon the application.

AS568B- Outside Diameter SCUBA Application Seal
214 1-1/4 Cylinder with Large Neck/Valve (3/4 NPS - All Aluminum, most Steel cylinders)
116 15/16 Cylinder with Small Neck/Valve (7/8 UNF - "Genesis" 3500 psi Steel cylinders)
112 11/16 Standard DIN Regulator/Valve (Nearly all DIN regulators)
111 5/8 Small DIN Regulator/Valve (You know if you need this one)
015 11/16 Cylinder Valve Bonnet Nut
014 5/8 Standard Yoke Regulator/K-valve
013 9/16 Large Low-Pressure Port/Hose (1/2 UNF)
012 1/2 High-Pressure Port/Hose (7/16 UNF) Manifold and Manifold Port Plugs
011 7/16 Standard Low-Pressure Port/Hose (3/8 UNF)
010 3/8 Low-Pressure Hose/2nd Stage Regulator Cylinder Valve Stem
006 1/4 BC Power Inflator
003 3/16 High-Pressure Hose/SPG swivel

Materials -- O-rings can be made of a very long list of exotic materials; most are inappropriate for SCUBA applications. The materials commonly used in SCUBA applications appear in the following table.

Material Description
Acrylonitrile-Butadine Copolymers
(NBR or Nitrile)
Most O-rings used in SCUBA are made from Nitrile, a hydrocarbon based synthetic rubber. Nitrile offers excellent resistance to many oils and acids and has good physical properties. However, Nitrile is not a very oxygen resistant material and is not considered oxygen compatible. Nitrile is also often referred to as Buna-N.
Fluorocarbon Elastomers
(FKM)
O-rings made of FKM have been the preferred choice for oxygen and nitrox compatibility in SCUBA diving applications. FKM is an elastomer with excellent oil and oxygen resistance at high and low temperatures, very good chemical resistance. Even for use with ordinary air, most experts agree that FKM O-rings outperform common Nitrile O-rings. Viton is DuPont Performance Elastomer's brand name for FKM.
Polyurethane
(PUR)
The milky white O-ring occasionally seen in the face of K-valves, sometimes called a 10,000 psi O-ring, is made of Polyurethane. Polyurethane is very abrasion-resistant, but it is sensitive to UV light (sunlight).
Ethylene Propylene Diene Monomer
(EPDM)
EPDM O-rings are becoming more common in SCUBA because some people feel it's a safer material for use in breathing air systems. EPDM is a elastomer with excellent weatherability, heat resistance, dielectric qualities and odor-free characteristics. However, EPDM is less resilient and is not recommended for use with petroleum derivatives.

Hardness -- O-rings are normally available with a hardness rating, as measured by an ASTM type-A durometer, of 70 (the "soft" kind) or more rarely a rating of 90 (the "stiff" kind). The O-rings sold on this page are 90-duro (except for the -003 & -006 O-rings), and well suited for the SCUBA applications we describe. The soft O-rings are appropriate for dynamic applications where the O-ring is providing a seal with a constantly moving part, such as inside regulators. The stiff O-rings are more durable in static applications where the O-ring is providing a seal with stationary or occasionally moving parts, such as a valve.

Color -- O-rings are available in nearly any color, although most commonly seen in black. Most Viton O-rings are black. The Viton O-rings sold on this page are brown, simply to make them easily distinguishable from Nitrile O-rings which are usually black and EPDM O-rings which are often purple. Just to be clear, the COLOR of the O-ring is MEANINGLESS. Some people believe there is a difference in quality based on color, but that is more likely attributed to unknowingly using soft dynamic O-rings in static applications. Our O-ring manufacturer states there is little difference in quality for O-rings based on color alone, and independent testing supports that statement. Some people also incorrectly believe a Viton O-ring can be distinguished from a Nitrile O-ring by the surface appearance. Nitrile O-rings are said to have a shiny surface, and Viton O-rings are said to have a matte surface. This is not a reliable indicator, and certainly not true if the O-ring has been lubricated.


Warning
WARNING

Viton® is DuPont Performance Elastomer's brand name for their fluorocarbon based elastomers (FKM). However, DuPont Performance Elastomers is not the only company that manufactures FKM products. Bear in mind that not all FKMs are equivalent, and there are different types intended for various different applications. Many people incorrectly refer to any and all generic "oxygen-compatible" O-rings as Viton. The industry has also begun to see a lot of counterfeits, particularly with O-rings manufactured outside the US. As a result, you could end up with O-rings that are not the type of FKM you need and possibly not even an oxygen compatible O-ring at all. We've seen impostor O-rings that were actually a mixture of a little FKM and mostly cheap plain rubber, yet were also brown. We're going to be very frank: some of the 'asian import' o-ring kits in the little plastic compartmentalized boxes may not be 'as advertised'. The problem has become so widespread that we've had to resort to making up our own kits.


> Polyurethane O-rings for SCUBA
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$5.00

> Polyurethane O-rings for SCUBA URL for this product

This milky white O-ring, sometimes called a 10,000 psi O-ring, is made of Polyurethane. Our experience with this o-ring is that it is nearly indestructible. If it's leaking, it probably just needs to be cleaned. Like Viton, it's suitable for Oxygen service. Polyurethane is very abrasion-resistant, but it is sensitive to UV light. You should not store spare Polyurethane O-rings where they are exposed to sunlight for an extended period of time. The 112 size O-rings work great in DIN regulators and the face of our Pro DIN/K valve Yoke adapters. We also offer the 014 size O-rings for standard Yoke only K-valves. Polyurethane costs a bit more but is well worth the price as the only reason we find we have to replace one is when it falls out and we lose it.


3-Piece Brass O-Ring Pick Set
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$9.95

3-Piece Brass O-Ring Pick Set URL for this product

Brass O-Ring Pick Set This three piece brass o-ring pick set is specifically designed for removal and placement of o-rings, but at Dive Gear Express we use them for all sorts of other tasks. The brass tips won't scratch soft seating surfaces in valves, regulators or other equipment and the color coded plastic handles have a comfortable ridged grip. Two of the tools have a sharp point and work well for removal, the third has a tiny ball on the end and is nice for placement. The set of three tools are in a re-sealable plastic package to help keep them organized and clean.


> DGX Scuba Tank Key Chain (O-Ring Case)
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$3.00

> DGX Scuba Tank Key Chain (O-Ring Case) URL for this product

Silver Tank Key Chain w/O-Rings This Scuba Tank Key Chain is useful for keeping save-a-dive O-rings or other small items dry and clean. The 'tank' is made of aluminum with an octagonal plastic 'boot' that unscrews and is sealed with an O-ring to keep moisture out. A split ring is included at the top so it will attach to any key ring or zipper on your dive bag. Available in silver color with no logo or in black color with our Dive Gear Express logo. Dimensions of inside compartment are approximately { 0.75 in X 1.25 in | 19 mm X 32 mm } with { 2.25 in | 5.7 cm } total length.

NOTE: Spare O-rings are NOT included and must be purchased separately. Although there is a version with some rubber o-rings and a sharp brass pick in the base, we selected without because of problems getting the version with the pick through TSA security checks.

> Tribolube Oxygen-Compatible Lubricant
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> Tribolube Oxygen-Compatible Lubricant URL for this product

The Aerospace Lubricants Tribolube® line of products are designed specifically for scuba diving applications. With over 35 years of background science, Tribolube offers superior extreme pressure and anti-wear properties, thus extending equipment life by dramatically reducing corrosion. Tribolube is a synthetic lubricant that is chemically inert, oxygen-compatible, non-migrating, odorless, non-toxic, and non-flammable.

Tribolube 71 is designed for open and closed circuit diving systems. This O2 safe lubricant is compatible with all o-ring seals and materials used in the scuba industry. Tribolube also offers significantly reduced residue buildup in comparison to other oxygen compatible lubricants. It is available in a choice of three types of packaging: a { 2 oz | 57 g } tube, a { 2 oz | 57 g } syringe, as well as a handy { 5 g | 0.18 oz } single use pillow pak.

Click Here to read the Material Safety Data Sheet (MSDS) for Tribolube 71.


Warning
WARNING

Dive Gear Express only sells lubricants that are supplied directly from the factory in their carefully selected packaging, but some other retailers are purchasing in bulk containers and then repackaging it in smaller sizes. Aerospace Lubricants has advised us this is an unapproved and possibly unsafe practice. These unapproved package types contain mold release agents, silcone treated rubber stoppers in the syringes, and dyes in colored containers, all of which can leach into the lubricant itself. These containers, along with the repackaging conditions themselves, are certain to produce lubricants which are contaminated and no longer suitable for oxygen service.



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How Much and Where to Use Lubricant

Some people very sparingly lubricate the SPG swivel O-rings, but you should know that SPG and hose assemblies from our suppliers are never lubricated. If you do choose lube the SPG swivel o-rings, take care not to be so generous that lube might migrate up into the Bourdon tube mechanism and cause your SPG to become inaccurate. Some people also sparingly lubricate the threads of valves before they are installed in the cylinder neck. Do NOT lubricate the neck O-ring itself, and do not lubricate the valve/regulator seal O-ring or DIN threads. Most lubricant is used with dynamic seals in regulators and other equipment with moving parts. As a general rule, the O-rings used with static seals in SCUBA applications should not be lubricated at all. The lubricant just causes contamination to stick to the surface of the O-ring and results in more problems with a static seal than any dubious benefit the lubricant might provide.


URL for this Pricelist

Pricing for Oxygen Compatible O-Rings & Lubricant

Image Item SKU Description Ship Status US $ Price
[ ]

Tribolube 71 O2 Compatible Lubricant, {5 g | 0.18 oz} Pillow Pak  ASL-PC71-9705 Tribolube 71 O2 Compatible Lubricant, {5 g | 0.18 oz} Pillow Pak In Stock  $4.25
Tribolube 71 O2 Compatible Lubricant, {2 oz | 57 g} Tube  ASL-PC71-9721 Tribolube 71 O2 Compatible Lubricant, {2 oz | 57 g} Tube In Stock  $25.99
Tribolube 71 O2 Compatible Lubricant, {2 oz | 57 g} Syringe  ASL-PC71-9722 Tribolube 71 O2 Compatible Lubricant, {2 oz | 57 g} Syringe In Stock  $26.99
3-Piece Brass O-Ring Pick Set  INV-RB0894 3-Piece Brass O-Ring Pick Set In Stock  $9.95
Scuba Tank Key Chain - Silver (O-Ring Case)  DX-10950 Scuba Tank Key Chain - Silver (O-Ring Case) In Stock  $3.00
Scuba Tank Key Chain - Black (O-Ring Case)  DX-109502 Scuba Tank Key Chain - Black (O-Ring Case) In Stock  $3.00
  Viton Brand O-rings  
 FX-V568A-KIT Genuine Viton Master O-ring kit, 50 pieces, five each: 003,010,011,012,013,014,015,111,112,214 In Stock  $24.95
 FX-V568A-SAD Genuine Viton Save-a-Dive O-ring Kit, 5 pieces, one each: 010,011,012,014,112 In Stock  $3.00
 FX-2055RK Genuine Viton BC Inflator O-ring Kit, 5 pieces: one each 112,012,011, two 006 In Stock  $3.00
Genuine Viton 214 O-ring, brown, 90 duro, qty of five  FX-V568A -214 Genuine Viton 214 O-ring, brown, 90 duro, qty of five In Stock  $3.00
Genuine Viton 116 O-ring, brown, 90 duro, qty of five  FX-V568A -116 Genuine Viton 116 O-ring, brown, 90 duro, qty of five In Stock  $3.00
Genuine Viton 112 O-ring, brown, 90 duro, qty of five (DIN)  FX-V568A -112 Genuine Viton 112 O-ring, brown, 90 duro, qty of five (DIN) In Stock  $3.00
Genuine Viton 111 O-ring, brown, 90 duro, qty of five  FX-V568A -111 Genuine Viton 111 O-ring, brown, 90 duro, qty of five In Stock  $3.00
Genuine Viton 015 O-ring, brown, 90 duro, qty of five  FX-V568A -015 Genuine Viton 015 O-ring, brown, 90 duro, qty of five In Stock  $3.00
Genuine Viton 014 O-ring, brown, 90 duro, qty of five (Yoke)  FX-V568A -014 Genuine Viton 014 O-ring, brown, 90 duro, qty of five (Yoke) In Stock  $3.00
Genuine Viton 013 O-ring, brown, 90 duro, qty of five  FX-V568A -013 Genuine Viton 013 O-ring, brown, 90 duro, qty of five In Stock  $3.00
Genuine Viton 012 O-ring, brown, 90 duro, qty of five  FX-V568A -012 Genuine Viton 012 O-ring, brown, 90 duro, qty of five In Stock  $3.00
Genuine Viton 011 O-ring, brown, 90 duro, qty of five  FX-V568A -011 Genuine Viton 011 O-ring, brown, 90 duro, qty of five In Stock  $3.00
Genuine Viton 010 O-ring, brown, 90 duro, qty of five  FX-V568A -010 Genuine Viton 010 O-ring, brown, 90 duro, qty of five In Stock  $3.00
Genuine Viton 006 O-ring, brown, 75 duro, qty of five  FX-V568A -006 Genuine Viton 006 O-ring, brown, 75 duro, qty of five In Stock  $3.00
Genuine Viton 003 O-ring, brown, 75 duro, qty of five (SPG spool)  FX-V568A -003 Genuine Viton 003 O-ring, brown, 75 duro, qty of five (SPG spool) In Stock  $3.00
  Polyurethane O-rings  
Polyurethane 112 O-ring, white, qty of five (DIN)  FX-U568A-112 Polyurethane 112 O-ring, white, qty of five (DIN) In Stock  $5.00
 FX-U568A-014 Polyurethane 014 O-ring, white, qty of five (Yoke) In Stock  $5.00

All Dive Gear Express financial transactions are in United States Dollars (US $).
Prices in currencies other than US $ are approximations and should be used as a guide only.

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