CONTROL PLATE IN A VALVE

摘要

A control plate for effecting superior shut-off in a proportional control valve comprises a moveable disk-shaped element that has a flat surface, generally perpendicular to the valve axis of symmetry when closed, and translates toward or away from an orifice surrounded by a narrow lip or orifice ridge. Enhanced leak tightness in the valve shut-off condition is achieved by selectively incorporating into the control plate materials that are softer than the material comprising the orifice ridge.

主权项

1. A valve control plate configured to sealingly engage a fluid conduit opening surrounded by a planar orifice ridge, the valve control plate comprising:
a valve control plate body formed from a first material having a first hardness, the valve control plate body having a first surface configured to face toward the fluid conduit opening, the valve control plate body having a recess defined in the first surface of the valve control plate body; and a valve seat insert formed from a second material having a second hardness that is less than the first hardness, the valve seat insert having a first surface configured to face toward the fluid conduit opening and sealingly engage the planar orifice ridge, and the valve seat insert being received in the recess.