DIAPHRAGM VALVE AND SEAT HOLDER UNIT FOR DIAPHRAGM VALVE

摘要

A diaphragm valve and a seat holder unit for the diaphragm valve which allows easy replacement of a seat is provided. The diaphragm valve includes a retainer configured to hold a seat holder. The seat holder is demountably arranged on a body to hold a seat. The retainer has a substantially cylindrical shape and includes an inward flange portion receiving the outer peripheral edge portion of the seat holder, and is demountably mounted on the diaphragm holding members in a state of holding the seat holder.

主权项

1. A diaphragm valve including a body provided with a fluid channel, a seat arranged in a peripheral edge of the fluid channel formed on the body, a seat holder demountably arranged on the body and configured to hold the seat, a diaphragm configured to open and close the fluid channel by being pressed against or moved away from the seat, a diaphragm holding member configured to clamp an outer peripheral edge portion of the diaphragm with the seat holder, a vertical moving device configured to move the diaphragm holder configured to hold a center portion of the diaphragm upward and downward, further comprising: a retainer configured to hold the seat holder, characterized in that the retainer is demountably mounted on the diaphragm holding member in a state of holding the seat holder.