Explosion proof flame retardant breathing valve (HXF-IZ type)

Instructions for Use

The breathing valve is installed on the top of the storage tank. It is to solve the problem of positive and negative pressure gas inside the tank, so that the liquid in and out of the tank is not obstructed. When the external liquid is input into the tank, a large amount of gas inside the tank is exhaled (called positive pressure). When the liquid inside the tank is exported, it must be sucked into the tank from the outside air (called negative pressure). If the breathing valve automatically closes when the work stops, it will not leak the liquid and gas inside the tank, which ensures the quality of the liquid inside the tank.

Selection of breathing valve diameter and pressure rating

The diameter of the fire-resistant breathing valve selected depends on the size of the inlet and outlet pipelines of the storage tank. Generally, the cross-sectional area of the inlet and outlet pipelines is 1:1, and a 2:1 diameter can be selected.

Maintenance and Care

1. For the safety of using the flame retardant breathing valve, check whether the guide rod and valve disc are flexible before use.

2. The corrugated fire-resistant layer should be regularly removed and cleaned within 6 months to ensure that each hole on the fire-resistant layer is unobstructed, prevent blockage, and ensure safe and normal use.

3. Regularly check whether the ventilation positive and negative valve discs are flexible, and whether the sealing surface of the guide rod and valve disc is damaged. If there is any damage, it should be repaired immediately.

4. After the inspection is completed, it can be reused when everything is normal.

main purpose

The GFQ-2 new type breathing valve is used as the main safety equipment for installing fixed top storage tanks for crude oil, gasoline, kerosene, light diesel, aromatic hydrocarbons, etc. It plays a role in evaporation loss and protecting the storage tank from damage under overpressure or vacuum. This valve is usually used in conjunction with flame arresters.

Main Features

This valve has the characteristics of high ventilation, good sealing performance, low leakage, and corrosion resistance.

Main technical parameters

Operating pressure:

A-grade positive pressure: 355Pa (36mm water column);

Negative pressure: 295Pa (30mm water column);

B-level positive pressure: 980 Pa (100 mm water column);

Negative pressure: 295Pa (30mm water column);

C-level positive pressure: 1765Pa (180mm water column);

Negative pressure: 295Pa (30mm water column);

Please indicate the product name, model, specifications, and pressure rating when placing an order.