A pressure-independent control valve with a drain, and method of draining the valve

Abstract

The invention relates to a pressure-independent control valve comprising a fluid inlet; a fluid outlet; a fluid path between the fluid inlet and the fluid outlet; a pressure differential control, wherein the pressure differential control comprises a chamber in fluid communication with the fluid path; and a drain. The drain comprises a drain outlet in fluid communication with the chamber and a drain closure to open and close the drain outlet. Fluid can drain from the valve when the drain outlet is open. The drain closure is movable between an open position to open the valve and a closed position to close the valve. The invention further relates to a fluid system comprising the valve with the drain, and to a method of draining the valve via the drain.

Dependencies are inferred from the claim text.