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AS568 NBR Metric Quad Rings Seals , Pneumatics / Hydraulic Y Ring 70 Shore The sealing principle of the Quad?-?ring is nearly the same as the O-ring?sealing. The initial sealing is achieved?by the diametrical squeeze in a right?angled groove. The system pressure
itself creates a positive sealing force.Following are some advantages of?Quad?-rings:- With Quad?-rings the standard?grooves are deeper in comparison?with O-ring glands. So diametrical
squeeze is lower than with?O-rings. This makes dynamic sealing?possible with reduced friction.
- The four lips of the Quad?-ring?create more sealing capacity and at?the same time a groove for lubrication,which is very favorable for?dynamic sealing.
-The most important advantage of?the Quad?-ring is the high stability?for dynamic applications. In the?situation that an O-ring rolls in the?groove and creates torsion, a?Quad?-ring will slide with no
negative results.
- More resistant to spiral failure.
Note 1:
It is recommended, especially for?dynamic seals, to use the Quad?-ring?with the largest possible cross section?or thickness because thicker rings can?withstand more tolerance variance.A 4-inch I.D. (100 mm) Quad?-ring is?available with cross sections of .070(1,78 mm), .103 (2,62 mm), .139 (3,53mm), and .210 (5,33 mm). For dynamicapplications use, if there is room, the?largest cross section available (.210 /5,33 mm).
Note 2:
Because Quad?-ring glands have?deeper grooves than O-rings,standard O-ring back-up rings cannot?be used. The actual groove dimensions?are needed to supply the correct?sized machined back-up ring.
Note 3:
Use FKM Quad?-rings with minimum?stretch because FKM Quad?-rings?have a?smaller?tolerance range than?NBR Quad?-rings.Standard cross sections of?Quad?-rings
Application Range from vacuum to?6000 psi (400 bar, 40 MPa.). Over 750?psi (50 bar, 5 MPa.) when used inconnection with back-up-rings.?Speeds up to 1.6 ft/s (0.5 m/sec.)reciprocating).
Surface finish is the same as with Oring?applications. See page 15 and 24.The temperature range is from -50°C .


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NBR?70?TEST?REPORT ASTM?D2000?M2BG?714?B14?EO14?EF11?EF21?EA14?F17 |
PROPERITIES | SPECIFICATION | TEST?RESULT | TEST?METHOD |
Hardness?shore?A | 70±5 | 72 | D2240 |
Tensile?MPA?Min | 14 | 14.5 | D12 |
Elongation?%?Min | 250 | 315 | D412 |
Gravity | ? | 1.263 | D297 |
Heat?resistant?70h?100℃?Hardness?change | ±15 | ﹢5 | D573 |
Tensile?strength% | ±30 | ﹢15 | ? |
Elongation?Max | -50 | -12 | ? |
Compression?Max?22h??at?100℃ | 25 | 14 | D395 |
NO1?oil?resistant | ? | ? | ? |
Change?in?hardness | -10~+5 | +1 | D471 |
Change?in?tensile?Max | -25 | -16 | ? |
Change?in?Elongation | -45 | -20 | ? |
Change?in?Volume% | 0~25 | +6 | ? |
Fuel?resistant?70?H?at?23℃ | ? | ? | ? |
Hardness?change | ±10 | +3 | D471 |
Tensile?change?Max? | -25 | -8 | ? |
Elongation?change?Max | -25 | -10 | ? |
Change?in?Volume | -5~+10 | +3 | ? |
Water?Resistant | ? | ? | D417 |
Change?in?Hardness | ? | +3 | ? |
Change?in?tensile? | ? | +5 | ? |
Change?in?Elongation | ? | -14 | ? |
Change?in?Volume | ±15 | +3 | ? |
Low?Temperature?resistant? | ? | ? | D2137 |
3?MIN?-40℃ | Non?brittle | Pass | D2137 |
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