Breathable valveThe national standard is in accordance with the provisions of the National Standard "Design Fire Prevention Code for Petroleum and Chemical Industry Enterprises" (GB50160-92): Fixed roof tanks for Class A and B liquids shall be equipped with flame arresters and breathers.

Visible breathing valves and flame arrestors are indispensable safety equipment for storage tanks. The function of the breathing valve is not only to maintain the pressure balance of the tank, ensuring that the tank is not damaged under overpressure or vacuum conditions, but also to reduce

Vaporization and loss of the medium inside the can.

Breathable ValveCharacterized by compact structure, large air volume, minimal leakage, and excellent sealing performance. Also developed and produced an explosion-proof flame-retardant breathing valve with internationally advanced standards.

At the intake of the breathing valve, it completely prevents the entry of fire sources into the shell of the breathing valve, featuring compact size, light weight, and ease of maintenance, cleaning, and replacement.

Main Technical Parameters of the Breathing Valve:

1.Breathable valveSuitable for various materials such as oil, chemicals, pharmaceuticals, energy, special liquids, or gases.

2. Operation Pressure of Breathing Valve:

A：-295Pa (-30mmH2O)    +355Pa (+36mmH2O)

B：-295Pa (-30mmH2O)    +980Pa (+100mmH2O)

C：-295Pa (-30mmH2O)    +1750Pa (+180mmH2O)

D：-295Pa (-30mmH2O)    +98000Pa (+10000mmH2O)

3. Flame arrester breathing valve explosion-proof class: BS 5501: IIA, IIB, IIC

4. Breather Valve Shell Material: Carbon Steel, Aluminum Alloy, 304, 304L, 316, 316L

5. Breathing Valve Disc and Seat Material: Aluminum Alloy, Stainless Steel.

6. Breathing Valve Sealing Material: PTFE.

7. Breathing Valve Flange Standard: HG20592-97 PN 1.0. Please specify in the contract at the time of ordering if you require GB, HGJ, JB, ANSI, JIS standards or a change in pressure class.

8. Breather Valve Manufacturing and Testing Standards: manufactured and tested in accordance with the standards of SY7511-1987 "Breather Valves for Oil Storage Tanks" and GB5908-1986 "Fire-Extinguishing, Wawne and Testing Methods for Flame Arresters in Oil Storage Tanks," etc.

Manufacture and inspection.

Breath valves are categorized by structure as follows: (1) Double connection breath valves, Double connection flame arrester breath valves; (2) Inlet pipe breath valves.Combustion Retardant Breathing Valve with Suction Inlet Connection