Low-friction, no stick-slip internal swivel seal for medium to high pressure

Composite seal for sealing rod of swivel joints and rotary couplings.

The design is an O-ring energizing a wear-resistant PTFE cap. The cap has oil grooves on the inner diameter to provide lubrication, while the contoured outside diameter of the cap fits with the O-ring to prevent spinning between the cap and the O-ring.  It is used for pressure up to 5000*psi.  The seal can operate under very high PV for short operating cycles.  Small quantities are available in 1 to 3 days.

Operating Range
MaterialMax.PressureTemperatureSurface SpeedApplicationDry-runPV-Rating
Permachem 62335,000psi (350bar)-58 to 400°F (-50 to 200°C)Up to 400 fpm (2m/s)standard oil lubrication, high waterbased fluidsYES9
Permachem 62355,000psi (350bar)-58 to 400°F (-50 to 200°C)Up to 400 fpm (2m/s)Soft shaft material, gaseous media, FDA compliantYES9
Duraloy 47365,000psi (350bar)-58 to 400°F (-50 to 200°C)Up to 400 fpm (2m/s)low wear and abrasion, long service lifeYES9
Size Table (Inch)Standard sizes listed below are preferred sizes for new design applications; however, we offer any other seal size as required.Seals are available for any shaft diameter size in 0.001 inch increments without tooling charges, including Functional Range.
Shaft Diameter

Standard RangeFunctional RangeTolerance**D=B=D, BTol.+0.008/-0min.max.max.
0.250-0.749"0.250 - 5.100"+0/-0.00150.096A + 0.193A + 0.002+0.0015/-00.0870.0400.0150.005
0.750-1.499"0.390 - 9.640"+0/-0.0020.148A + 0.295A + 0.003+0.002/-00.1260.0600.0200.005
1.500 - 7.499"0.750 - 18.000"+0/-0.0030.217A + 0.433A + 0.004+0.003/-00.1650.080
7.500 - 12.999"1.500 - 25.750"+0/-0.0040.305A + 0.610A + 0.005+0.004/-00.248
13.000 - 25.599"4.750 - 25.750"+0/-0.0050.413A + 0.826A + 0.006+0.005/-00.3190.1300.0700.005
25.600 - 40.999"25.000 - 63.000"+0/-0.0060.551A + 1.102A + 0.008+0.006/-00.3750.1500.1000.005
41.000 - 63.000"consult AHPSeals engineering
**Standard cross-sections(CS) listed and non-standard sizes can be provided for any shaft size up to 63 inches.**For heavy-duty applications that include; frequent pressure spikes; vibrations; and thermocycling, it is recommended to move up one size in the CS. Surface finish: Shaft (A) plunge ground, zero lead, Ra 8-16µin using elastomer seals, Ra 6-12µin using PTFE seals.Housing (D,L) Ra 32-63µin, shaft material hardness 55-65RC. See Technical Info for more specific information.

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Seal Housing Drawing