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Product Category：BREATHER VALVE
Product Name：JAV type insulation jacket breather valve
Product Tag：insulation jacket breather valve
Update Date：2021/8/30 23:56:14
Jacketed insulation breather valve: Jacketed insulation breather valve is used to install the main safety equipment on fixed top storage tanks such as crude oil, gasoline, kerosene, light diesel, aromatics, etc. The jacket insulation breather valve is used to prevent evaporation loss and protect the storage tank. The function of avoiding damage when subjected to overpressure or vacuum (jacket protection jacket breather valve flame arrester). JAV jacket insulation breather valve is usually used with flame arrester.
Ordering instructions for jacketed breather valves:
Product Model and Name of Jacketed Insulated Breather Valve
Nominal diameter of jacketed insulation breather valve DN
Rated flow coefficient of jacket insulation breather valve KV
Nominal pressure and pressure difference of jacketed insulation breather valve
Jacket insulation breather valve body and valve components materials
Flow characteristics of jacket insulated breather valve
Applicable temperature of jacket insulation breather valve
Power supply voltage and control signal of jacketed insulation breather valve
Whether the jacketed insulation breather valve has accessories
The main technical parameters of the jacket insulation breather valve:
It is suitable for the storage of various petroleum, chemical, pharmaceutical, energy, special liquid or gas materials.
A: -295Pa (-30mmH2O) ~ +355Pa (+36mmH2O)
B: -295Pa (-30mmH2O) ~ +980Pa (+100mmH2O)
C: -295Pa (-30mmH2O) ~ +1750Pa (+180mmH2O)
D: Customer special requirements: -295Pa (-30mmH2O) ~ +98000Pa (+10000mmH2O).
Explosion-proof level: BS 5501: IIA, IIB, IIC.
Shell material: carbon steel, aluminum alloy, stainless steel: SUS304, SUS304L, SUS316, SUS316L, lining, etc.
Material of valve disc and valve seat: aluminum alloy, stainless steel, etc.
Seal material: polytetrafluoroethylene, etc.
Flange standard: HG20592-97 PN1.0, when customers need to use GB, SH, HGJ, JB, ANSI, JIS and other standards or change the pressure level, please indicate in the order contract.
Manufacturing and testing standards: Manufacture and acceptance according to standards such as petroleum storage tank breather valve SY7511-96, petroleum storage tank flame arrester fire resistance performance and test method GB5908-86, or customer specified standards.
Use and performance specifications :
Used for storage tanks of various light oil products in coking plants, city gas plants, oil refineries and chemical plants. After the oil tank uses the breather valve, the evaporation loss of the oil in the oil tank can be significantly reduced, and the pressure in the oil tank can be automatically adjusted and the ventilation of the oil tank can be improved. It complies with the requirements of the standard SY7511-87 of the Ministry of Petroleum Industry.
1. The jacketed breather valve is made of cast steel and stainless steel with good corrosion resistance.
2. The valve disc and valve sealing ring are made of stainless steel and tetrafluoroethylene. Low temperature resistance, good antifreeze performance.
3. The valve is a ventilating device installed on the fixed roof tank to reduce oil evaporation loss and control the pressure of the storage tank.
4. This valve has large ventilation, small leakage, corrosion resistance and good antifreeze performance.
5. It can automatically adjust the internal and external pressure of the petroleum storage tank and other features.
6. Simple structure, light weight, easy maintenance and easy installation.
7. The water pressure test is qualified.
Scope of application:
It can be used with flame arrester.
Set pressure (operating pressure):
Positive pressure: +980pa Negative pressure: -295pa
1. Qualified low temperature and antifreeze performance: at -40. C is operated for 2 hours, the pressure valve disc, vacuum valve disc and sealing ring have no deformation, which fully meets the design requirements.
2. At room temperature 36. Continuous operation for 72 hours at C, 10,000 movements, the pressure valve disc, vacuum valve disc and the contact surface of the guide rod have no signs of wear or bruising, and the guide rod rises and falls sensitively without jamming.
Maintenance and repair:
In order to ensure the performance of the jacketed breathing valve to achieve the purpose of full use. The breathing valve should be inspected and maintained in half a year.
1. Check whether the pressure valve disc and the vacuum valve disc move flexibly, and whether the contact surface of the guide rod and the valve seal ring is damaged.
2. When reinstalling the pressure valve disc, ensure that the contact surface is strict and the guide rod can rise and fall flexibly.
4. When the new valve is started, the anti-vibration material of the valve disc should be removed before installation, otherwise the breathing valve will fail.
5. Because the weather is humid and windy and the temperature reaches zero degrees, the storage tank cannot be used for sending oil. In emergency production, the oil metering hole and other gas supply products must be opened first to maintain the safety function of the storage tank.
6. Before the breather valve works normally, the oil metering hole must be opened.
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