Frost proof valve device for public water supply network, has driving unit with bypass line that connects vertical and horizontal sections of connecting channel which join inflow and discharge openings

摘要

A valve device has a connecting channel (30) that joins an inflow opening (10) and a discharge opening (20). An actuating mechanism (50) drives a main valve (40) that regulates flow of fluid through the connecting channel. A driving unit (70) has a bypass line that connects vertical and horizontal sections (31,32) of the connecting channel.