A fuel pressure regulator includes a housing defining a fuel inlet and a fuel outlet; a valve seat located between the fuel inlet and the fuel outlet, the valve seat being centered about a valve seat axis; a valve member centered about a valve member axis, the valve member being moveable between 1) a closed position where the valve member engages the valve seat to prevent fuel flow from the fuel inlet to the fuel outlet and 2) an open position where the valve member is disengaged from the valve seat to permit fuel flow from the fuel inlet to the fuel outlet; and a grounding member grounded to the housing which engages the valve member to cause the valve member axis to tip relative to the valve seat axis when the valve member moves from the closed position to the open position.

A relief valve for relieving pressure in a fluid conduit that includes a cradle positioned in the relief valve conduit and having a ball support surface and a ball mounted on the ball support surface adapted for sealing against the valve seat of the pressure relief port. A spring supported surface and a spring positioned in the pressure relief conduit urges the cradle and the ball into sealing position against the valve seat of the pressure relief port.

A relief valve for relieving pressure in a fluid conduit that includes a cradle positioned in the relief valve conduit and having a ball support surface and a ball mounted on the ball support surface and adapted for sealing against the valve seat of the pressure relief port. A spring support surface and a spring positioned in the pressure relief conduit urges the cradle and the ball into sealing position against the valve seat of the pressure relief port.

A portable Brinell metal hardness tester has a test head mounted in a carriage, movable vertically along elevating screws, and includes a reciprocable pumping rack movable in response to manual movement of a pumping lever, for pumping hydraulic fluid into a passageway of the tester to increase hydraulic fluid pressure in the tester to a level required for metal hardness testing; and a stent located in the passageway for permitting pumped hydraulic fluid to flow through the passageway into a test head portion of the tester to apply hydraulic fluid to the ball contacting the test piece and interferingly stopping the rack upon movement of the rack into the passageway by a preselected amount.