Technical data Explosion-proof marks: Exd Ⅱ CT6 Gb/DIPA20TA, T6 • protection grade: IP66 • rated working voltage: 24V; 36 v. 110 v; 220 v • rated power: 20W • sound intensity: equal to or equal to 75dB (R=2m) • cable outer diameter • nominal caliber: DN15 • corrosion protection grade: WF2 Product features • the shell is made of aluminum alloy with high-pressure electrostatic spraying on the surface. • new design of internal structure, using small motor to drive CAM bell bowl, stable performance, long life; • both ac and dc bell are cylinder flameproof structure, with good explosion-proof performance and safety and reliability; • the inner surface of the bell bowl is plated with beryllium bronze, and there is no spark; • compact product structure, beautiful appearance, convenient installation and maintenance.