Abstract: Fluid filters and modular relief valve assemblies for use therein are provided where the modular relief valve assembly comprises a bypass housing, a bypass spring, a valve plug, and a locator spring. The locator spring is at least partially seated within and modularly joined to a trailing portion of the bypass housing. The bypass spring and the valve plug are modularly joined to the bypass housing. The trailing portion of the bypass housing comprises at least one annular forward-facing seating surface. The leading portion of the bypass housing comprises a sealing extension, an intermediate reducing taper, and a valve plug sealing surface. The sealing extension is positioned between the forward-facing seating surface and the intermediate reducing taper. The intermediate reducing taper is positioned between the sealing extension and the valve plug sealing surface and reduces towards the valve plug sealing surface.

Abstract: Fluid filters and modular relief valve assemblies for use therein are provided where the modular relief valve assembly comprises a bypass housing, a bypass spring, a valve plug, and a locator spring. The locator spring is at least partially seated within and modularly joined to a trailing portion of the bypass housing. The bypass spring and the valve plug are modularly joined to the bypass housing. The trailing portion of the bypass housing comprises at least one annular forward-facing seating surface. The leading portion of the bypass housing comprises a sealing extension, an intermediate reducing taper, and a valve plug sealing surface. The sealing extension is positioned between the forward-facing seating surface and the intermediate reducing taper. The intermediate reducing taper is positioned between the sealing extension and the valve plug sealing surface and reduces towards the valve plug sealing surface.

Abstract: A fluid filter having a filter canister, a fluid inlet, a fluid outlet, filter media, and a relief valve assembly is described. The relief valve assembly comprises a bypass housing, a bypass spring, a valve plug, and a locator spring. The locator spring is joined to the bypass housing and is compressed between the bypass housing and a bypass end of the filter canister such that a trailing portion of the bypass housing forcibly engages the bypass end of the filter media and a seated end of the filter media forcibly engages an outlet end of the filter canister.

Abstract: A coil spring/relief valve and an oil filter assembly comprising an oil filter housing, filter media, and the coil spring/relief valve are provided. The coil spring/relief valve may comprise a valve assembly comprising a valve can, a sealing member, a relief spring, a coil spring that may be used to keep constant pressure against the filter media, and a pressure relief valve can. The sealing member and the relief spring can be mounted on the pressure relief valve can. The coil spring and the pressure relief valve can may be held together as a one piece assembly within the oil filter housing. The valve can receives the coil spring, which can be supported by the oil filter housing, to force the valve can into contact with the oil filter media with a constant pressure.