Abstract: Embodiments of a tappet are disclosed herein. The tappet has a front and a back, and the tappet includes a first stirrup and a second stirrup. The first stirrup has a first opening with a plurality of angular positions from 0° to 360°. The angular position of 90° and 270° correspond to the back and front of the tappet, respectively. The second stirrup has a second opening. The first and second openings are configured to carry a roller pin on which the roller is provided. The first stirrup includes a first region having a first depth below a first interior surface of the first stirrup. The first region extends from 150° to 210° around the first opening. The first region has a first end located at an angular position of between 180° and 270° and a second end located at an angular position of between 0° and 90°.

Abstract: A mechanism for controlling forces in a valve assembly such as flow induced forces. The valve assembly comprises a valve body defining first and second flow passages. A valve is movable in the valve body along an axis to control fluid flow between the first and the second flow passages. The valve has first and second control edges that are relatively spaced axially and radially such that the valve includes a radially extending surface between the first and second control edges. First and second restrictions are formed between the first and second control edges and the valve body, respectively. The first and second restrictions form a intermediate pressure region such that when the first and second flow passages are at different fluid pressures with fluid flowing past the valve, the intermediate region acts on the radially extend surface of the valve.

Abstract: A mechanism for controlling forces in a valve assembly such as flow induced forces. The valve assembly comprises a valve body defining first and second flow passages. A valve is movable in the valve body along an axis to control fluid flow between the first and the second flow passages. The valve has first and second control edges that are relatively spaced axially and radially such that the valve includes a radially extending surface between the first and second control edges. First and second restrictions are formed between the first and second control edges and the valve body, respectively. The first and second restrictions form a intermediate pressure region such that when the first and second flow passages are at different fluid pressures with fluid flowing past the valve, the intermediate region acts on the radially extending surface of the valve.

Abstract: A mechanism for controlling forces in a valve assembly such as flow induced forces. The valve assembly comprises a valve body defining first and second flow passages. A valve is movable in the valve body along an axis to control fluid flow between the first and the second flow passages. The valve has first and second control edges that are relatively spaced axially and radially such that the valve includes a radially extending surface between the first and second control edges. First and second restrictions are formed between the first and second control edges and the valve body, respectively. The first and second restrictions form a intermediate pressure region such that when the first and second flow passages are at different fluid pressures with fluid flowing past the valve, the intermediate region acts on the radially extending surface of the valve.