초록 ▼

A test cock apparatus with freeze protection capability for controlling fluid pressure and flow in a backflow preventer valve, including a valve housing having interior walls defining a chamber therein and including an inlet port and a discharge port communicating with said chamber for permitting fl

A test cock apparatus with freeze protection capability for controlling fluid pressure and flow in a backflow preventer valve, including a valve housing having interior walls defining a chamber therein and including an inlet port and a discharge port communicating with said chamber for permitting fluid flow therethrough. A temperature-responsive freeze protection element is positioned within the chamber and is axially moveable between a closed position in sealing engagement with the interior walls of the valve housing for preventing fluid flow through said discharge port, and an open position out of sealing engagement with the walls of the valve housing for permitting passage of fluid through the discharge port. The test cock apparatus also includes a test cock communicating with the chamber of the valve housing for monitoring fluid pressure therein.

대표청구항 ▼

1. A test cock apparatus with freeze protection capability for controlling fluid pressure and flow in a backflow preventer valve, comprising:(a) a valve housing having interior walls defining a chamber therein and including an inlet port and a discharge port positioned at a right angle to each other

1. A test cock apparatus with freeze protection capability for controlling fluid pressure and flow in a backflow preventer valve, comprising:(a) a valve housing having interior walls defining a chamber therein and including an inlet port and a discharge port positioned at a right angle to each other and communicating with said chamber for permitting fluid flow therethrough; (b) a temperature-responsive freeze protection element positioned within the chamber in axial alignment with said discharge port and in flow communication with said inlet port, and axially moveable between a closed position in sealing engagement with said interior walls of the valve housing for preventing fluid flow through the discharge port and an open position out of sealing engagement with the walls of the valve housing for permitting passage of fluid through the discharge port; and (c) a test cock communicating with the chamber of the valve housing adjacent a point of intersection of the longitudinal axis of the inlet port and the longitudinal axis of the discharge port for monitoring fluid pressure within the chamber.