Poppet valve with external regulator for flow restrictor (POPPET VALVE HAVING EXTERNAL ADJUSTMEMT FOR A FLOW RESTRICTOR)

摘要

The poppet valve has a flow restrictor downstream of the poppet which is externally adjustable by rotation of the poppet valve stem. The restrictor is in the form of a throttle ring screwed into the valve guide and the throttle ring has a diameter smaller than the diameter of the valve port sealed by the poppet so that the assembly of the stalk ring can be removed through the valve port while accidental removal This is prevented by a protruding cap screw on the throttling extending to a diameter larger than the diameter of the port. The valve poppet also has a contour area adjacent to the seat that limits after the poppet is first opened to minimize corrosion wear on the poppet sealing surface when a pressure drop occurs adjacent to the sealing surface.