| 摘要 |
A seal between a pair of relatively axially movable coaxial components is provided by a spring energised plastic seal which is located axially with respect to the outer component to separate a high pressure fluid area from a low pressure fluid area, the spring energised plastic seal has a plastic ring, the plastic ring defining a body portion and a pair of sealing elements, the sealing elements extending coaxially to the high pressure side of the body portion and being spaced radially by spring means, into sealing engagement with opposed surfaces of the two components, a projection extending axially from the low pressure side of the body portion adjacent the external diameter thereof, said projection engaging an axial projection on the outer component so that engagement thereof will support the plastic ring radially.
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