Industrial shaft seals

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gab.ru V-ring Берг sealsАБ bergab@ya.ru Тел. (495)-228-06-21, факс (495) 22 V-ring seals – Inch sizes B A C B1 d d2 d1 d3 Shaft diameter d 1 (range) Reference metric shaft size Inside Height diameter d C Dimension A Free width B max min Fitted d 2 =(d 1 +) d 3 =(d 1 +) width B 1 Design Lip code SKF Designation in mm in in in in in in in 86.419-89.209 2200 80.905 .827 2.657 3.937 .940 4.530 3.350±.500 VR5 R CR 472201* 97.358-99.543 2500 86.020 .590 .560 .980 .400 1.770 .790±.160 VR1 R CR 425000* 96.063-100.000 2500 89.520 1.180 1.280 2.560 .940 4.530 2.000±.500 VR4 R CR 425003* 126.260-129.670 3250 113.740 1.180 1.280 2.560 .940 4.530 2.00±.500 VR4 R CR 432503* 127.950-131.890 3300 115.390 1.180 1.280 2.560 .940 4.530 2.00±.500 VR4 R CR 433003* Select the larger V-ring when the dimension d 1 is on the boundary between two sizes of V-ring. Purple dot on V-ring indicates LongLife material. Sizes under .748 (19 mm) are brown with no dot. * Check for availability and pricing. gab.ru 358Берг АБ bergab@ya.ru Тел. (495)-228-06-21, факс (495) 22
gab.ru Берг АБ bergab@ya.ru Тел. (495)-228-06-21, Industrial факс shaft seals (495) 22 MVR axial shaft seals For added protection in extremely contaminated applications, in addition to our standard V-ring, SKF also offers the type MVR. The MVR seal also seals axially and functions by combining positive lip contact with centrifugal “slinging” action. However, the MVR seal is different in that the rubber element is stretch fitted into a metal shell. The metal shell is then press-fitted onto the shaft. This shell provides excellent protection from heavy debris and it automatically accommodates high rotating speeds without auxiliary clamping devices. Advantages/User benefits: N The metal shell serves as a support and deflector. The rubber body and lip are protected from damage and displacement by external debris (i.e. rocks, viscous media). N In most cases, the shell also functions as a holder that keeps the rubber lip in position during high surface speeds. No additional axial retention is required. Contact SKF regarding radial retention limits. N Due to its compact design, narrow installation widths are possible. N Frictional heat build-up and torque drag are very low compared to contacting radial shaft seals. As rotary speed increases, the MVR seal lip lifts off the counter surface starting at about 2362 FPM (12 m/s) and drops to zero contact by 3937 FPM (20 m/s). Like the V-ring, the high rotary speed prevents contamination ingress while minimizing power loss. N Service life is considerably higher than radial seals in contaminated environments and can extend to thousands of hours. Construction The MVR seal lip is made from an 80 durometer nitrile rubber with very good wear resistance. Other elastomers are possible in production lot orders. There are two versions of the metal shell, the MVR1 and the MVR2 with shell extension. Please refer to the illustrations below for details. The stock metal element is zinc plated cold-rolled carbon steel. Acid resistant steel similar to SAE 316 is available by special order. Temperature range Generally the same as NBR V-rings or –40 °C to 100 °C. gab.ru Берг АБ bergab@ya.ru Тел. (495)-228-06-21, факс 359 (495) 22
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Industrial shaft seals

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