JAV-I jacketed insulated breathing valveDetailed product description：

The JAV-I jacket insulated breathing valve is used as the main safety equipment for installing fixed top type storage tanks for crude oil, gasoline, kerosene, light diesel, aromatic hydrocarbons, etc. The jacket insulated breathing valve plays a role in evaporation loss and protecting the storage tank from damage under overpressure or vacuum (jacket insulated breathing valve). Jacketed insulated breathing valves are usually used in conjunction with flame arresters.

The main appearance and flange connection dimensions of JAV-I jacket insulated breathing valve:

Jacketed insulated breathing valve Specification	Jacketed insulated breathing valve Weight (Kg unit)	Jacketed insulated breathing valveInstallation size (mm)
		D1	D1	L	H	n×Φ
DN50	six point five	Φ110	Φ140	one hundred and sixty	two hundred and fifty-five	4×14
DN80	nine point eight	Φ150	Φ185	two hundred and thirteen	two hundred and sixty	4×18
DN100	twelve	Φ170	Φ205	two hundred and sixty-five	two hundred and ninety	4×18
DN150	twenty-one	Φ225	Φ260	three hundred and five	three hundred and thirty	8×18
DN200	thirty-one	Φ280	Φ315	three hundred and fifty-five	three hundred and fifty	8×18
DN250	thirty-five	Φ335	Φ370	four hundred and twenty	four hundred	12×18

Note: The connecting flange of the jacket insulated breathing valve complies with the provisions of JB78-59 "Cast Iron Flanges"