Spunding valves (Bunging valves) are variable pressure relief valves, commonly used on brewery tanks to assist with carbonation/maintenance of desired CO2 levels and release excess gas during the fermentation. They are not necessarily suitable as safety pressure relief valves. You should ensure any tanks are operated within their specified SWP ( safe working pressure) and have adequate pressure and vacuum relief fittings.
This valve is used in brewing equipment. Hygienic design, stainless steel SUS304. Sealing parts EPDM, in line with sanitary standards, reasonable structure, easy to use, automatic exhaust, and the accuracy of 90%, is the praise of most users in the fine industry!