RGFQ-2 all-weather breathing valveDetailed product description：

Main performance specifications:

A-grade positive pressure	355Pa (36mm water column)
negative pressure	295Pa (30mm water column)
B-level positive pressure	980Pa (100mm water column)
negative pressure	295Pa (30mm water column)
C-level positive pressure	1765Pa (180mm water column)
negative pressure	295Pa (30mm water column)

Product Usage

The RGFQ-2 new breathing valve is used as the main safety equipment for installing fixed top storage tanks for crude oil, gasoline, kerosene, light diesel, aromatic hydrocarbons, etc. It plays a role in evaporation loss and protecting the storage tank from damage under overpressure or vacuum. This valve is usually used in conjunction with flame arresters.

Product Structure Features:

This valve has the characteristics of high ventilation, good sealing performance, low leakage, and corrosion resistance.

Main external dimensions:

Specification	weight (Kg unit)	Installation size (millimeters)
		D1	D	L	H	n×Ø
DN50	six point five	Ø110	Ø140	one hundred and sixty	two hundred and fifty-five	4×18
DN80	nine point eight	Ø150	Ø185	two hundred and thirteen	two hundred and sixty	4×18
DN100	twelve	Ø170	Ø205	two hundred and sixty-five	two hundred and ninety	4×18
DN150	twenty-one	Ø225	Ø260	three hundred and five	three hundred and thirty	8×18
DN200	thirty-one	Ø280	Ø315	three hundred and fifty-five	three hundred and fifty	8×18
DN250	thirty-five	Ø335	Ø370	four hundred and twenty	four hundred	12×18