Patent ID: 7178553
Filing Date: 2007-02-20
Classification: F16K,Y10T

Abstract:
1. A valve comprising: (a) a valve body having an interior chamber, an inlet and an outlet; (b) a pair of valve seats provided in the interior chamber of the valve body, the valve seats being spaced from one another along an axis, each of the valve seats having a sealing surface; (c) a pair of valve plugs provided in the interior chamber of the valve body, the valve plugs being spaced from one another along the axis, each of the valve plugs having a sealing surface and being movable along the axis between an open position and a closed position, wherein the sealing surfaces of the plugs and the seats are spaced from one another in the open position and wherein each of the plugs sealingly engages one of the seats along their respective sealing surfaces in the closed position, and wherein the inlet and the outlet are spaced from one another in a direction normal to the axis and are in flow communication with one another through the interior chamber with the plug in the open position; (d) a plug actuating mechanism for moving the valve plugs along the axis from the open position to the closed position; and (e) a first biasing mechanism for biasing the plugs axially toward the open position; wherein the valve body comprises a fitting block and a housing; wherein the valve outlet is provided in the housing and the valve inlet is provided in the fitting block; wherein the fitting block and the housing are separately formed; and the fitting block comprises an exterior portion located outside the interior chamber of the valve body, an attachment portion by which the fitting block is attached to the housing, and an interior portion which is received inside the interior chamber; wherein the attachment portion of the fitting block comprises an attachment flange to which the exterior portion and the interior portion of the fitting block are both attached, the attachment flange having an aperture through which the valve inlet communicates with the interior chamber of the valve body; wherein the attachment flange is sealingly secured to an outside surface of the housing; and wherein the exterior portion, the attachment portion and the interior portion of the fitting block are sequentially arranged.