All-weather breathing valve

Technical Parameters

Product model: GFQ
Nominal diameter: DN50~300mm
Nominal pressure: PN0.6~1.6MPa
Working temperature: 30-60 ℃
Applicable media: kerosene, diesel, toluene, etc

Product Details

Applicable scope
The new all-weather breathing valve is suitable for storing Class A oil products with a flash point D of 28 ℃ and Class B oil products with a flash point D of 60 ℃, such as gasoline, benzene, methyl benzene, kerosene, light diesel, engine oil, crude oil, and chemical product storage tanks with the same properties. It can be used together with the new corrugated flame arrester.

Instructions
The breathing valve is installed on the top of the storage tank to solve the problem of positive and negative pressure gas inside the tank, so that the liquid inside the tank is not obstructed. When the external liquid enters the tank, a large amount of gas is exhaled (called positive pressure). When the liquid inside the tank is output to the outside, it must be sucked into the tank from the outside air (called negative pressure). If the breathing valve automatically closes when it stops working, it will not cause the liquid and gas in the tank to leak out, providing a favorable guarantee for the quality of the liquid in the tank.

Maintenance and upkeep
For the safety of using the breathing valve, check whether the guide rod and valve disc are flexible before use. This valve should be regularly (within 6 months) checked for flexibility of the positive and negative valve discs at the ventilation port, and for any damage to the contact surface of the valve disc. If there is any damage, it should be repaired immediately. After maintenance, everything is normal and can be reused.

National standard flange connection external dimensions: GB, JB

model	Installation dimensions（mm）
model	d1	d	d3	h	m-h
dn25	70	100	115	180	4×10
dn50	110	140	160	255	4×12
dn80	150	185	213	260	4×16
dn100	170	205	265	290	4×16
dn150	225	260	305	330	8×16
dn200	280	315	355	350	8×16
dn250	335	370	420	400	12×16

American standard flange connection external dimensions: Ansi, API, and ASME can be provided as JIS standards

model	Installation dimensions（mm）
model	d1	d	d3	h	m-h
1"	79.5	108	115	180	4×15
2"	120.5	152	160	255	4×19
3"	152.5	190	213	260	4×19
4"	190.5	229	265	290	8×19
6"	241.5	254	305	330	8×22
8"	298.5	343	355	350	8×22
10"	362	406	420	400	12×25

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