Equipped with a connecting flame retardant single call valve

Take overfire retardantA single call valve is a ventilation device fixed on the top of a storage tank. To ensure the normal pressure inside the tank, prevent damage to the storage tank caused by overpressure, and reduce the loss of liquid evaporation inside the tank.

According to the Fire Protection Design Code for Petrochemical Industry (GB50160-92), "Athe second of the ten Heavenly StemsFixed top tanks for liquids should be equipped with flame arresters and breathing valves, but the types of breathing valve products in China are single and cannot meet the needs of various departments in the petrochemical industry. In order to solve the above problems, our company has jointly developed the HX series of new products with the design institute. This product has the advantages of multiple types, complete specifications, compact structure, light weight, high ventilation, and low leakage. The products include single call valves, single suction valves, and breathing valves. Various structural forms can be combined with flame arresters to construct, and the required connecting pipes can also be configured.

Operating pressure and operating environment temperature

Exhaled pressure:+980Pa

(The operating pressure indicator can also be specified by the user),Operating environment temperature: -30 to 60 degrees Celsius℃

Working medium

Gasoline, kerosene, diesel, aromatics, sulfur, air, or other petrochemical materials,

The selection of flame retardant category is "HGJ21-89", and the choice of IIA or IIB level is specified by the user.

Manufacturing and Inspection Standards:

Refer to 'SY'/T0511.1-2010”Manufacturing acceptance shall be carried out in accordance with standards such as GB5908-86.

Note: The flange connection adopts HG20593， PN1.0MPa， It can also be manufactured according to other standards such as HGJ, JB, ANSI-B16.5, JIS, etc. according to user needs.

maintenance

To ensure the takeover of the beltfire retardantThe performance of the single call valve meets the purpose of safe use and should be regularly maintained（3 months)Conduct inspections and maintenance;

1 Check whether the pressure valve disc operates flexibly, and whether the contact surface between the guide rod and the valve sealing ring is damaged.

2 When reinstalling the pressure valve disc, it should be ensured that the contact surface is tight and the guide rod can be raised and lowered flexibly.

3 Enable new belt takeoverfire retardantWhen using a single call valve, the shock absorber on the valve disc must be removed.