Premium medium-pressure double-lip oil seal

ASHP


Premium medium-pressure double-lip oil seal

Medium-pressure double-lip oil seal with integrated steel reinforcement element

The dynamic seal lip is made of a premium low-friction Duralast™ material to reduce friction, heat build-up, and wear. The rubber-covered OD of the seal creates a tight seal with the housing bore.  The secondary lip serves both effective protection against airside contaminants and as a lube retainer.   Maximum service life can be achieved by applying a suitable lubricant between the two sealing lips.    A retaining device is recommended to hold the seal in place under pressures above *psi.  This seal is able to accommodate press-in fitment in housings with short axial length.




Operating Range
MaterialContinuous PressureMax. Pressure SpikeTemperatureSurface SpeedDry-runPV-Rating
Duralast 8838-LF60psi (4.1bar)150psi (10.3bar)-4 to 392°F (-20 to 200°C)Up to 2,000 fpm (10m/s)NO2
Fluoroelastomer (FKM),Viton®60psi (4.1bar)150psi (10.3bar)-4 to 392°F (-20 to 200°C)Up to 1,800 fpm (9m/s)NO1.8
Duralast 5117-LF60psi (4.1bar)150psi (10.3bar)-13 to 212°F (-25 to 100°C)Up to 1,200 fpm (6m/s)NO1
Nitrile (NBR)60psi (4.1bar)150psi (10.3bar)-13 to 212°F (-25 to 100°C)Up to 1,000 fpm (5m/s)NO0.9
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, including Functional Range.
A
Shaft Diameter
CS
Cross-section
D
Bore Diameter
B Diameter
Tol. +/-0.010
LF
C
Chamfer
R1
Radius
Standard RangeFunctional RangeTolerance*D=ToleranceB=Tol. +0.010/-0min.max.
0.200-0.599"0.200 - 5.000"+/-0.0033/16A + 0.375+/-.001A + 0.1000.2100.1800.0400.020
0.600-1.299"0.200 - 6.000"
+/-0.003
1/4
A + 0.500
+/-.001
A + 0.150
0.210
0.180
0.050
0.020
1.300 - 2.299"0.200 - 8.000"+/-0.003
5/16A + 0.625+/-.001A + 0.1600.2600.2100.0500.020
2.300 - 3.299"0.250 - 10.000"+/-0.0033/8A + 0.750+/-.001A + 0.1700.3100.2650.0600.020
3.300 - 7.999"0.250 - 15.000"+/-0.0041/2A + 1.000+/-.0015A + 0.2000.4100.3500.0900.030
8.000 - 15.999"0.250 - 63.000"+/-0.0053/4A + 1.500+/-.002A + 0.2000.5100.4300.1300.030
16.000 - 63.000"consult with Ahpseals engineering
*Standard cross-sections (CS) listed and non-standard sizes can be provided for any shaft size up to 63 inches. Seal retaining plate for ressures above 7 psi recommended. Surface finish: Shaft (A) plunge ground, zero lead, Ra 8-16µin for rubber seal lip, Ra 6-12µin for PTFE seal lip. Housing (D,L) Ra 32-63µin, shaft material hardness 55-65RC. See Technical Info for more specific information.

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