Passenger vans, such as the Ford Transit and Mercedes-Benz Sprinter, are designed explicitly for carrying larger groups. They typically provide maximum seating capacity and often have more cargo space than standard minivans. Their rugged construction is apt for commercial uses, making them ideal for shuttle services and family vacations alike.
Special seal types and their features
The material of the sealing lip is chosen according to the liquid to be sealed and the rotational speed. For larger shafts, an NBR sealing lip can cope with surface speeds of up to 10-12 m/s, while an FKM lip is suitable for speeds of up to 35-38 m/s.
In the UK, customers have a range of options for purchasing oil seals. There are several reputable UK gasket manufacturers that offer a wide selection of oil seals to meet various industrial needs.
• Machining of lip surface (stable oil drip under pressure)
Heat and attrition are generated by the parts moving against each other. The sealing function can only be ensured if an intentional defined leakage of oil is able to exit for seal lubrication, preventing seal wear and possible failure, while a tight static seal between shaft and sealing lip must be assured when the shaft is stationary.
Viton (FKM/FPM) Oil Seals

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Like any element of the engine, oil seals are subject to wear. Over time they can lead to possible leaks of lubricating liquid.
6. AMOUNT OF LUBRICANT: Seals perform better when lubricated but some machines will go through some dry spells. When this occurs using a leather or PTFE seal will be more beneficial as those type of seals can operate with less lubrication.