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Chevron type seals have an extremely wide application for medium to heavy duty hydraulic and similar services. Normally seals are manufactured from canvas impregnated with Nitrile/Viton rubber and is used in the form of set consisting of top and bottom rings. The number of V-rings in a set depends upon the pressure to be sealed. Functions satisfactorily upto 5000 PSI.

The O-ring is the most versatile of all seals, with the particular advantage of simplicity and low cost. It is suitable for the both static and dynamic sealing in almost every field of application upto 1500 PSI pressure within the operating limits and material characteristics, provided these seals are technically desig+ned and applied. Selection of an elastomer(Polymers) largely depends on application and physical properties required for an O-ring.

Q & H Rings, normally achieve their best performance as dynamic seals with medium Pressure and reciprocating actions having a lower frictional resistance then O-ring at pressures upto about 600 PSI

The V- rings offers the advantage of a smaller cross-section for sealing ability. It is seldom used singly, however, but rather in sets with suitable header when it is capable of providing sealing against extremely high pressure with only a light preload. Performance varies with the angle of 'Vee'

Wiper are a special class of seal normally employed for their wiping & scraping action in conjunction with sliding a or reciprocating motions rather than as seals and such, although they may provide and effective sealing action. Their normal application is to remove dust, dirt and similar articles from a surface passing under the wiper and thus provide protection for interior surface of a machine.

Combinations of single rings and matching headers are generally known as duplex rings to distinguish them from unit seals (implying integral construction of a combination). The term is applied particularly to combinations of a header with a fork or U- ring section. Other sections allied to separate components(such as O rings and back up rings) are more usually referred to as combination seals and dealt with in.

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