Q-ROHR

Electric controlling and measuring devices and apparatus for pressure release relating to gas and dust explosions, namely, pressure gauges, pressure relief valves, electronic monitors for monitoring gas and dust explosions, and signaling units in the nature of emergency signal transmitters and relays for use at industrial plants

Regulating devices for gas apparatus and installations, namely, pressure regulators for gas installations and regulating device comprised of a tube and mesh filter insert for allowing the safe venting and suppression of dust and flame explosions indoors for commercial and industrial use