Double-Lip V-Spring-loaded rotary shaft seal for extreme environments

This seal is designed to provide long service life and low friction for extreme service applications over a wide temperature range.  This seal is for high PV applications characterized by high pressure and low speed.   This seal has a small axial length, and is available in many materials specially suited to handle aggressive chemicals and environments.  A secondary dust lip provides dirt exclusion and retains fluid.  Also available in small quantities for repairs and seal replacement in 1 to 3 days.

Operating Range
MaterialContinuous PressureMax.Pressure SpikeTemperatureSurface SpeedApplicationDry-runPV-Rating
Permachem 62333,000psi (210bar)3,500psi (240bar)-58 to 400°F (-50 to 200°C)Up to 1,200 fpm (6m/s)standard oil lubrication, high waterbased fluidsYES9
Permachem 62353,000psi (210bar)3,500psi (240bar)-58 to 400°F (-50 to 200°C)Up to 1,200 fpm (6m/s)Soft shaft material, gaseous media, FDA compliantYES9
Duraloy 47363,000psi (210bar)3,500psi (240bar)-58 to 400°F (-50 to 200°C)Up to 1,200 fpm (6m/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

Tolerances L SC R
Standard RangeFunctional RangeToleranceD=B=D, BTol.+0.010/-0min.min.max.
0.200 - 0.999"0.200 - 5.000"+0/-0.0011/4A + 0.500A + 0.008+0.002/-00.2600.0800.0600.015
1.000 - 1.999"0.330 - 9.500"+0/-0.0025/16A + 0.625A + 0.010+0.002/-00.3900.1000.0800.015
2.000 - 9.499"0.860 - 9.500"+0/-0.0033/8A + 0.750A + 0.012+0.004/-00.3900.1000.1100.015
9.500 - 18.000"1.500 - 18.000"+0/-0.0041/2A + 1.000A + 0.015+0.005/-00.4500.1100.1100.015
18.001 - 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 pressure above 3,000psi or temperature above 200°F contact engineering for clearances. Surface finish: Shaft (A) plunge ground, zero lead, Ra 6-12µin, Housing (D,L) Ra 16-32µin. Shaft material hardness 55-65RC. See Technical Info for more specific information.

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Seal Housing Drawing