| 摘要 |
A spin-on filter including a combination anti-drainback and bypass valve is disclosed herein. The valve includes an annular valve support disposed between a filter element and an end plate of the filter. The valve support has an inner sleeve portion which seats about a central outlet of the end plate and an outer sleeve portion with holes therethrough. The valve member has an expandable collar portion which normally seals the bypass holes and functions as a bypass valve and a skirt portion with normally seals the inlet holes in the end plate and functions as an anti-drainback valve. The valve member is preferably made of a low swell silicone material which requires higher oil pressures to bypass the filter at low starting oil temperatures than at higher operating oil temperatures.
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