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The vent valve is a kind of safety valve, which is a ventilation device fixed at the top of the storage tank to ensure the normal state of the tank internal pressure.
Prevent that over-pressure or ultra-vacuum will cause damage to the storage tank, and also reduce the loss of liquid evaporation. This valve is normally used in conjunction with a flame arrestor.
Per the country's Petrochemical Design Fire Protection Code (GB50160-92) regulations: Hard roof tanks for Class A and B liquids should be fitted with flame arresters and breathing apparatus valves.
The all weather fire rated breathing valve is a new type of breathing valve safety equipment required for petrochemical storage tanks. The advantages of the all-weather fire protection breathing valve are good fire-stop breathing performance, light weight and easy maintenance.
The All Weather Fire Protection Breathing Valve is suitable for Class A oil products with a flash point below 28°C and Class B oil products with a flash point below 60°C .
Such as gasoline, kerosene, diesel oil, crude oil, benzene, toluene, ethanol and other medium storage tanks, it usually works in the temperature environment from -35℃ to +60℃.
All Weather Fire Protection Breathing Valve is designed to install breathing valve main safety equipment on fixed roof storage tanks such as crude oil, gasoline, kerosene, light diesel oil and aromatics.
The all-weather fire protection breathing valve takes on the role of evaporative loss and protects the storage tank from damage when under overpressure or vacuum. The all-weather fire protection breathing valve also has good ventilation and good sealing, low leakage, corrosion resistance and other characteristics.
Function
The all-weather fire protection breathing valve is mainly usedly used to meet the ventilation requirements of C-class breathing liquid storage tanks on the top of the storage tank;
Ensure that the storage tank will not be damaged in over-pressurization, while reducing evaporative loss of the medium in the storage tank.
All Weather Fire Rated Breathing Valves are manufactured and tested to GB5908-97 and SY7511-87 standards in the petroleum industry.
The all-weather fire rated breathing valve features an electrostatic ground wire to keep the breathing valve and tank at the same potential. The all-weather fire protection breathing valve has antifreeze properties and is suitable for cold regions.
The all-weather breathing valve combines the functional properties of the all-weather breathing valve and the fire extinguisher and combines both effectively.
Operating pressure
Level A gauge pressure: 355 Pa (36 mm Hg); Negative pressure: 295 Pa (30 mmHg)
Level B gauge pressure: 980 Pa (100 mm Hg); Negative pressure: 295 Pa (30 mmHg)
Level C positive pressure: 1765 Pa (180 mmHg); Negative pressure: 295Pa (30mmHg)
Repair and maintenance
To ensure a weatherproof respirator valveNormal use
1. The corrugated fireproof layer should be removed and cleaned regularly within 3-6 months to ensure that every hole in the fireproof layer is clear to prevent clogging and ensure safe for normal use.
2. Regularly check whether the movement of the positive and negative valve discs of ventilation is flexible and whether the contact seal between the guide rod and the valve disc is damaged. If present If damage occurs, it should be replaced immediately.
3. During inspection, maintenance and reinstallation, make sure that the joint surfaces in the VeValves are close together and the valve disk can be raised and lowered flexibly.
4. When the new valve is used, the shockproof objects between the valve discs should be removed before installation, otherwise the breathing valve will fail.
