Actually they do have a name.They are called
quad-rings
or -
like Squiby calls them - "X-rings" .
" Quad-rings are four lipped seals with a specially developed sealing profile. It has a double sealing function as compared to O-ring. A wide range of elastomer materials for both standard and special applications allows practically all liquid and gaseous media to be sealed. The choice of a suitable material is determined by the temperature, pressure and media. They are vulcanized as a continuous ring. Quad-rings are supplied to the American Standard AS 568 A.
Advantages of using Quad-ring:
- Avoid twisting in the groove.
- The seal does not tend to roll in the groove during reciprocating movement.
- Low friction. It requires less radial squeeze than a comparable O-ring.
- Less squeeze mean less friction, less wear, and thus a longer service life
- Very good sealing efficiency. Due to it special profile, a high sealing effect is achieved.
- A lubricant reservoir formed between the sealing lips improves start up "
http://www.toparts.com/o-ring/
https://www.prepol.com/products/x-rings-quad-rings
--------------------------------------------------
As for sizes :
Edit : There's one thing though that I can not understand.
At Dynavap site ,at the FAQ / "What to clean and how to clean my device "
one can read : "
Do NOT clean with alcohol or other flammable liquids. Doing so may damage the condenser quad rings and any wood components.We suggest using DynaWax to maintain the polish on the wood as well as lubricating the o-rings for reassembly. Reassemble components to match the original assembly. When re-inserting, push pieces of the device together, adding lubricant and a slight twist to ease rubber o-rings in place. "
Lubricant ? Which type of lubricant since alcohol can damage the quad rings ?
( BTW Isopropyl alcohol seems not to affect at all the condenser quad rings ,by personal experience.)
At VAPCAP instructions one can read :
"
WARNING: Cleaning with alcohol or other flammable liquids is not recommended. Alcohol will not damage any component of the VapCap, even with prolonged soaking, but we do not recommend using it. "
Ok,now alcohol will not damage any component of the VapCap, even with prolonged soaking ...
But still Dynavap does not recommend using it .
Still at the paper manual that came along with the M ,one can read inside :
"
OmniVap instructions :
(...)
a.CAUTION: Do NOT clean with alcohol or other flammable liquids. Doing so may damage the condenser quad rings and any wood components.
(...)
Lubricating o-rings may help the process;apply a small amount of petroleum jelly or wood conditioner as needed."
Petroleum jelly ?
Hey !Just wait a sec .I've always thought that petroleum jelly and o-rings are bad idea.
Applying vaseline can erode many type of o-rings .Others harden and crack.
Others expand and become loose/slacky .Others just disolve,becoming a weird sticky gunk.
Check "Oil Resistance" of most common elastomers used for o-ring fabrication ,on the chart below:
George,I'm rather confused on the issue.
Iso seems not to affect any of the
- rings .
Yet,I'm cleaning tip and condenser ,while still hot.
Needs nothing but cotton.
Cheers.