All weather (flame retardant) breathing valve
Technical parameter
Product model: ZFQ-II, GFQ-II
Nominal diameter: DN50~300mm
Nominal pressure: PN0.6~1.6MPa
Working temperature: 30-60 ℃
Applicable media: kerosene, diesel, toluene, etc
Product Overview
The new breathing valve is used as the main safety equipment for installing fixed top tanks such as crude oil, gasoline, kerosene, light diesel, aromatics, etc. It plays a role in evaporative loss and protecting the tank from damage under overpressure or vacuum. This valve is usually used together with flame arrester. This valve has the characteristics of high ventilation, good sealing performance, low leakage, and corrosion resistance.
Main technical parameters
|
Operating pressure |
|||||
|
A-level |
B-level |
C-level |
|||
|
Positive pressure |
Negative pressure |
Positive pressure |
Negative pressure |
Positive pressure |
Negative pressure |
|
355pa(36mmWC) |
295pa(30mmWC) |
980pa(100mmWC) |
295pa(30mmWC) |
1765pa(180mmWC) |
295Pa(30mmWC) |
Main connection dimensions
|
Nominal Diameter DN |
WT (Kg) |
Installation ruler(mm) |
||||
|
D |
D1 |
L |
H |
n×Φ |
||
|
50 |
6.5 |
Φ110 |
Φ140 |
160 |
255 |
4×14 |
|
80 |
9.8 |
Φ150 |
Φ185 |
213 |
260 |
4×18 |
|
100 |
12 |
Φ170 |
Φ205 |
265 |
290 |
4×18 |
|
150 |
21 |
Φ225 |
Φ260 |
305 |
330 |
8×18 |
|
200 |
31 |
Φ280 |
Φ315 |
355 |
350 |
8×18 |
|
250 |
35 |
Φ335 |
Φ370 |
420 |
400 |
12×18 |
