An electromagnetic valve for use in controlling fluid flow between first and second passageways in a hydraulic valve block includes a valve body. The valve body defines a central axis, has a central opening therethrough, and has a lower end adapted to be inserted into a bore of the valve block. A ho
An electromagnetic valve for use in controlling fluid flow between first and second passageways in a hydraulic valve block includes a valve body. The valve body defines a central axis, has a central opening therethrough, and has a lower end adapted to be inserted into a bore of the valve block. A hollow valve dome is attached to an upper end of the valve body. An armature is axially moveable within the valve dome. A spring biases the armature in one axial direction. A closing element is coupled to a lower end of the armature. An electromagnetic coil coaxially surrounds the armature and is operable to effect axial movement of the armature in an axial direction opposite the one axial direction. A valve seat member is carried by a lower end of the valve body and has an orifice providing fluid flow between the first and second valve block passageways. The valve seat member defines a valve seat that surrounds the orifice and cooperates with the closing element for selectively closing the orifice. The valve seat member is formed as a deep drawn part and includes a tubular portion having one end defining a valve seat, and an opposite end connected to the valve body.
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1. An electromagnetic valve for use in controlling fluid flow between first and second passageways in a hydraulic valve block, comprising: a valve body defining a central axis and having a central opening therethrough, the valve body having a lower end adapted to be inserted into a bore of the valve
1. An electromagnetic valve for use in controlling fluid flow between first and second passageways in a hydraulic valve block, comprising: a valve body defining a central axis and having a central opening therethrough, the valve body having a lower end adapted to be inserted into a bore of the valve block;a hollow valve dome attached to an upper end of the valve body;an armature axially moveable within the valve dome;a spring for biasing the armature in one axial direction;a closing element coupled to a lower end of the armature;an electromagnetic coil coaxially surrounding the armature and operable to effect axial movement of the armature in an axial direction opposite the one axial direction;a valve seat member carried by a lower end of the valve body and having an orifice providing fluid flow between the first and second valve block passageways, the valve seat member defining a valve seat surrounding the orifice and cooperating with the closing element for selectively closing the orifice, characterized in that:the valve seat member is formed as a deep drawn part and includes a tubular inner wall defining an inner tubular portion concentrically arranged with a tubular outer wall defining an outer tubular portion, the inner tubular portion and the outer tubular portion connected by a radially extending wall, an inside surface of the outer tubular portion engaging an outside surface of the lower end of the valve body, one end of the inner tubular portion defining a valve seat. 2. The valve according to claim 1, wherein the tubular portion includes an upwardly facing chamfered surface for engagement with the closing element, the lower end of the chamfered surface terminating at or near the valve orifice, and the upper end of the chamfered surface terminating at or near an axially extending outlet opening. 3. The valve according to claim 1, wherein the radially extending wall defines a stop member provided on the deep drawn part for engagement with the valve body for axially locating the valve seat member relative to the valve body. 4. The valve according to claim 1, wherein the inner tubular portion is formed to include a circular edge facing upwardly in the direction of the armature, and including a reduced diameter section spaced downwardly from the circular edge to define an upwardly facing valve seat and the valve orifice. 5. The valve according to claim 1 wherein an upper end the inner tubular member projects upwardly into the valve body bore, and the valve body bore cooperate to define an annular fluid passageway. 6. The valve according to claim 1 wherein the radially extending wall and the outer tubular portion cooperate to define a passageway in communication with the valve orifice and one of the first and second passageways. 7. The valve according to claim 6, wherein the lower end of the valve body includes a radially extending notch defining a portion of the passageway. 8. The valve according to claim 7, wherein the outside surface of the lower end of the valve body includes a longitudinally extending groove radially aligned with and extending axially from the notch, the groove and the notch defining a portion of the passageway. 9. The valve according to claim 1 wherein the closing element is an axially extending tappet configured with an end portion formed as a partial sphere for engagement with the valve seat. 10. The valve according to claim 9 wherein the tappet includes a tapered portion having a lower reduced diameter portion and an upper portion which defines an upper diameter greater than the lower diameter, and wherein the angle of the taper is less than 10.0 degrees. 11. The valve according to claim 9 wherein the upper end of the tappet is received within a central bore formed in the armature, and including an adjusting element located in the armature and engageable with the upper end of the tappet for axially positioning the tappet relative to the lower end of the armature. 12. The valve according to claim 9 wherein, when the closing element is seated on the valve seat, the lowermost end of the tapered portion is near or below the uppermost end of the valve seat. 13. The valve according to claim 9, wherein the lowermost end of the tappet is provide with a depression. 14. The valve according to claim 9, wherein the valve body is provided with a shoulder spaced above the uppermost end of the valve seat by a predetermined distance for redirecting upward fluid flow from the valve seat in a downward direction along the inner wall of the valve bore. 15. The valve according to claim 14, wherein a curved wall connects to the shoulder with the inner wall of the valve bore. 16. The valve according to claim 14 wherein a chamfered wall connects the shoulder with the inner wall of the valve bore. 17. The valve according to claim 14, wherein the spring is positioned in the valve body above the shoulder. 18. The valve according to claim 14, wherein the upper end of the valve seat defines an outlet diameter, and wherein the valve body shoulder is spaced above the upper end of the valve seat a distance about equal to the outlet diameter. 19. The valve according to claim 1, wherein a filter assembly is mounted on the lower end of the valve body. 20. The valve according to claim 19, wherein the filter incorporates a check valve in the form of one of a quad seal and a lip seal.
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