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Avoiding Spiral wist
To minimize breakaway friction, an O-Ring groove must be wide enough to allow rolling or twisting of the seal. In the long stroke of a reciprocating seal application, this twisting action can strain and eventually tear the rubber, causing a failure mode known as spiral twist.

To prevent spiral twist, the Quad-Ring® seal’s four-lobed configuration is designed to withstand the distortion and extrusion often caused by high or pulsating pressure. To accommodate these forces, a Quad-Ring® seal uses a narrower groove than a comparable O-Ring seal.

Longer Seal Life
Because less squeeze means less friction with the four-lobe design, seals last longer. This means equipment in which the Quad-Ring® seal is installed will operate longer and require less maintenance.

No Parting Line On Sealing Surface
Unlike O-Rings, where partitioning lines are on the sealing surface, Quad-Rings® seal’s parting lines lie between the lobes, away from the sealing surface. This design eliminates the problems of leakage resulting from a parting line’s irregular surface.
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Daemar P/N

Nominal Size I.D.

Nominal Size O.D.

Nominal Thickness W

Actual Size I.D.

Actual Thickness W

4001 N/A 1/32 in N/A 3/32 in N/A 1/32 in N/A 0.029 in0.74 mm N/A 0.040 in1.02 mm
4002 N/A 3/64 in N/A 9/64 in N/A 3/64 in N/A 0.042 in1.07 mm N/A 0.050 in1.27 mm
4003 N/A 1/16 in N/A 3/16 in N/A 1/16 in N/A 0.056 in1.42 mm N/A 0.060 in1.53 mm
4004 N/A 5/64 in N/A 13/64 in N/A 1/16 in N/A 0.070 in1.78 mm N/A 0.070 in1.78 mm
4005 N/A 3/32 in N/A 7/32 in N/A 1/16 in N/A 0.101 in2.57 mm N/A 0.070 in1.78 mm
4006 N/A 1/8 in N/A 1/4 in N/A 1/16 in N/A 0.114 in2.90 mm N/A 0.070 in1.78 mm
4007 N/A 5/32 in N/A 9/32 in N/A 1/16 in N/A 0.145 in3.69 mm N/A 0.070 in1.78 mm
4008 N/A 3/16 in N/A 5/16 in N/A 1/16 in N/A 0.176 in4.47 mm N/A 0.070 in1.78 mm
4009 N/A 7/32 in N/A 11/32 in N/A 1/16 in N/A 0.208 in5.29 mm N/A 0.070 in1.78 mm
4010 N/A 1/4 in N/A 3/8 in N/A 1/16 in N/A 0.239 in6.070 mm N/A 0.070 in1.78 mm
4011 N/A 5/16 in N/A 7/16 in N/A 1/16 in N/A 0.301 in7.650 mm N/A 0.070 in1.78 mm
4012 N/A 3/8 in N/A 1/2 in N/A 1/16 in N/A 0.364 in9.25 mm N/A 0.070 in1.78 mm
4013 N/A 7/16 in N/A 9/16 in N/A 1/16 in N/A 0.426 in10.82 mm N/A 0.070 in1.78 mm
4014 N/A 1/2 in N/A 5/8 in N/A 1/16 in N/A 0.489 in12.42 mm N/A 0.070 in1.78 mm
4015 N/A 9/16 in N/A 11/16 in N/A 1/16 in N/A 0.551 in14.00 mm N/A 0.070 in1.78 mm
4016 N/A 5/8 in N/A 3/4 in N/A 1/16 in N/A 0.614 in15.60 mm N/A 0.070 in1.78 mm
4017 N/A 11/16 in N/A 13/16 in N/A 1/16 in N/A 0.676 in17.17 mm N/A 0.070 in1.78 mm
4018 N/A 3/4 in N/A 7/8 in N/A 1/16 in N/A 0.739 in18.77 mm N/A 0.070 in1.78 mm
4019 N/A 13/16 in N/A 15/16 in N/A 1/16 in N/A 0.801 in20.35 mm N/A 0.070 in1.78 mm
4020 N/A 7/8 in N/A 1 in N/A 1/16 in N/A 0.864 in21.95 mm N/A 0.070 in1.78 mm
4021 N/A 15/16 in N/A 1 1/16 in N/A 1/16 in N/A 0.926 in23.52 mm N/A 0.070 in1.78 mm
4022 N/A 1 in N/A 1 1/8 in N/A 1/16 in N/A 0.989 in25.12 mm N/A 0.070 in1.78 mm
4023 N/A 1 1/16 in N/A 1 3/16 in N/A 1/16 in N/A 1.051 in26.70 mm N/A 0.070 in1.78 mm
4024 N/A 1 1/8 in N/A 1 1/4 in N/A 1/16 in N/A 1.114 in28.30 mm N/A 0.070 in1.78 mm
4025 N/A 1 3/16 in N/A 1 5/16 in N/A 1/16 in N/A 1.176 in29.87 mm N/A 0.070 in1.78 mm
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