type all-weather resistance fire breathing valve-Breathing valve flame arrester series-呼吸阀阻火器厂家-上海冠环阀门制造有限公司

Performance and characteristics

The QZF all-weather fire-resistant breathing valve is a ventilation device installed on a fixed roof tank, which reduces oil evaporation loss, controls tank pressure, and prevents external flames from entering. This valve has the characteristics of high ventilation, low leakage, corrosion resistance, and has an electrostatic grounding wire to maintain an equal potential with the tank body. This valve has antifreeze performance and is suitable for cold regions.

National standard flange connection external dimensions: GB, JB

Model

	Installation dimensions（mm）
	D1	D	L	H	N-d
DN50	Ø110	Ø140	362	360	4×14
DN80	Ø170	Ø185	513	445	4×18
DN100	Ø170	Ø205	513	445	4×16
DN150	Ø225	Ø260	640	610	8×18
DN200	Ø280	Ø315	770	700	8×18
DN250	Ø335	Ø370	918	828	12×18
DN300	Ø395	Ø435	1050	910	12×23

American standard flange connection dimensions: ANSI, API, ASME available for JIS standards

model	Installation dimensions（mm）
model	D1	D	L	H	N-d
2	120.5	152	362	360	4×14
3	152.5	190	513	445	4×18
4	190.5	229	513	445	4×16
6	241.5	254	640	610	8×18
8	298.5	343	770	700	8×18
10	362	406	918	828	12×18
12	483	432	1050	910	12×23

Fire retardant breathable cap

Flame retardant - explosion-proof pip…

Vacuum breaking valve

Mesh flame arrester

All-weather breathing valve

Round-the-clock explosion-proof resis…

Ripple type flame arrester