| 摘要 |
A steam trap having a casing forming a chamber. The steam trap includes inlet and outlet fittings, mounted on the casing, and adapted for fluid inflow into and outflow from the chamber, respectively. The steam trap also includes a valve seat. The valve seat includes a contact surface defining a valve opening. The valve seat further includes a passageway that provides fluid communication from the valve opening to the outlet fitting. The passageway includes a wide section and a narrow section. The narrow section is positioned between the valve opening and the wide section. The ratio of the width of the narrow section to the height of the narrow section is greater than about 2:1. The steam trap also includes a valve member movably disposed in the chamber and adapted to be moved into and out of sealing engagement with the contact surface of the valve seat to open and close the valve opening. The steam trap also includes an operating lever disposed in the chamber and operatively connected to the valve member to vertically apply force to effect movement of the valve member toward and away from the contact surface of the valve seat thereby closing and opening the valve opening. The steam trap also includes a vertically movable inverted bucket provided in the chamber and operatively connected to the operating lever. Vertical movement of the inverted bucket in the chamber will effect movement of the operating lever thereby to move the valve member into and out of sealing engagement with the valve seat. |
