Metal-cased single fluoropolymer lip rotary shaft seal-MCB12

MCB12


Metal-cased single fluoropolymer lip rotary shaft seal

This high-performance seal design incorporates a formed seal lip, mechanically locked into a metal body. This design creates very low parasitic friction under load and adds much lower heat generation than most seal designs. This allows the seal to be used successful at higher peripheral speeds, where heat generation is the primary mode of failure for most seals. An integrated O-ring on the OD of the seal provides positive static sealing between the seal and the bore. It is typically used in lubricated or unlubricated high-speed and low pressure sealing applications. It is typically used as a seal for gearboxes or mixers in a dirty or dusty environment.




Operating Range
MaterialContinuous PressureMax.Pressure SpikeTemperatureSurface SpeedApplicationDry-runPV-Rating
Permachem 6233110psi (7.6bar)300psi (20bar)-58 to 400°F (-50 to 200°C)Up to 5,000 fpm (25m/s)standard oil lubrication, high waterbased fluidsYES5
Permachem 6235110psi (7.6bar)300psi (20bar)-58 to 400°F (-50 to 200°C)Up to 5,000 fpm (25m/s)Soft shaft material, gaseous media, FDA compliantYES5
Duraloy 4736110psi (7.6bar)300psi (20bar)-58 to 400°F (-50 to 200°C)Up to 5,000 fpm (25m/s)low wear and abrasion, long service lifeYES5
Size Table (Inch)Standard Range 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 Range
Functional Range
Tolerance
*D=
Tolerance
B=
B=
+0.012/-0
+/-0.010
min.
max.
0.315 - 0.999"
0.315 - 5.000"
+/-0.003
1/4
A + 0.500
+/-.001
A + 0.030
A + 0.120
0.262
0.223
0.070
0.020
1.000 - 5.999"
0.315 - 18.000"
+/-0.003
3/8
A + 0.750
+/-.001
A + 0.030
A + 0.120
0.300
0.255
0.085
0.020
6.000 - 15.999"
0.500 - 26.000"
+/-0.004
1/2
A + 1.000
+/-.002
A + 0.035
A + 0.120
0.375
0.310
0.090
0.030
16.000 - 25.999"
0.500 - 26.000"
+/-0.006
5/8
A + 1.250
+/-.003
A + 0.040
A + 0.1200.512
0.425
0.100
0.030
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.

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Seal Housing Drawing