Double-lip PTFE rotary shaft seal

SB40


Double-lip PTFE rotary shaft seal

The redundant seal lips enable this seal to handle higher pressure and create additional sealing capabilities, especially under flooded conditions. The soft OD eliminates damage to housings manufactured from expensive metals, and the integrated O-ring on the OD of the seal serves as an anti-rotation device and maximizes static sealing between the seal and the bore. Typically used for hydraulic motors, pumps, and transmissions. Small quantities are available in 2-4 days.




Operating Range
MaterialContinuous PressureMax.Pressure SpikeTemperatureSurface SpeedApplicationDry-runPV-Rating
Permachem 6233200psi (14bar)300psi (20bar)-58 to 400°F (-50 to 200°C)Up to 3,500 fpm (17.5m/s)standard oil lubrication, high waterbased fluidsYES8
Permachem 6235200psi (14bar)300psi (20bar)-58 to 400°F (-50 to 200°C)Up to 3,500 fpm (17.5m/s)Soft shaft material, gaseous media, FDA compliantYES8
Duraloy 4736200psi (14bar)300psi (20bar)-58 to 400°F (-50 to 200°C)Up to 3,500 fpm (17.5m/s)low wear and abrasion, long service lifeYES8
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
without
wiper lip +/- 0.010
B
with
wiper lip +/- 0.010
L
F
C
R
Standard RangeFunctional RangeTolerance*D=ToleranceB=
B=+0.012/-0+/-0.010min.max.
0.315 - 0.999"0.315 - 5.000"+/-0.0031/4A + 0.500+/-.001A + 0.030A + 0.1200.3250.2650.0700.020
1.000 - 5.999"0.315 - 18.000"+/-0.0033/8A + 0.750+/-.001A + 0.030A + 0.1200.3250.2650.0850.020
6.000 - 15.999"0.500 - 26.000"+/-0.0041/2A + 1.000+/-.002A + 0.035A + 0.1200.3750.3100.0900.030
16.000 - 25.999"0.500 - 26.000"+/-0.0065/8A + 1.250+/-.003A + 0.040A + 0.1200.5120.4250.1000.030
26.000 - 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.Surface finish: Shaft (A) plunge ground, zero lead Ra 6-12µin - Housing (D,L) Ra max. 32µin - Shaft material hardness 55-65RC. Use of installation tool is highly recommended. See Technical Info for more specific information.

Seal Size Selector – Request a Quote

  • Enter shaft, rod or bore diameter
  • If recommended size is not feasible, please enter your preferred dimensions
  • If recommended size is not feasible, please enter your preferred dimensions
Back to Products page
Seal Housing Drawing