Technical Parameters

Product model: QZF
Valve diameter: DN25-300mm
Nominal pressure: PN0.3~1.6MPa
Applicable temperature: 30 ℃~60 ℃
Applicable media: kerosene, diesel, toluene, etc

Product Details

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	?110	?140	362	360	4×14
DN80	?170	?185	513	445	4×18
DN100	?170	?205	513	445	4×16
DN150	?225	?260	640	610	8×18
DN200	?280	?315	770	700	8×18
DN250	?335	?370	918	828	12×18
DN300	?395	?435	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

Related Products

All-weather breathing valve

Round-the-clock explosion-proof resis…