The Breathing Valve Is A Safe And Energy-saving Product That Maintains The Pressure Balance Of The Tank And Reduces The Volatilization Of The Medium.

A breathing valve is a valve that ensures that the tank space is isolated from the atmosphere within a certain pressure range and that it can communicate with the atmosphere at or below this pressure range. Its function is to prevent the tank from being damaged by overpressure or vacuum, and at the same time reduce the evaporation loss of the liquid. It is mainly composed of a valve seat, a valve cover, a protective cover and two sets of opening and closing devices controlled by vacuum and pressure. The opening and closing device includes a valve flap, a guide rod, a spring, a spring seat and a sealing ring. When the pressure in the tank reaches the rated positive exhalation pressure, the pressure flap opens and the vapor in the tank is discharged; when the vacuum in the tank reaches the rated suction negative pressure, the vacuum flap opens and the air enters.

The breathing valve is a safe and energy-saving product that maintains the pressure balance of the tank and reduces the volatilization of the medium. The breathing valve makes full use of the pressure capacity of the tank itself to reduce the medium discharge. The principle is to control the row of the tank by the weight of the positive and negative pressure discs. Positive gas pressure and negative suction pressure; when the medium is taken out of the tank, the pressure of the gas space in the upper part of the tank is lowered, and when the negative pressure of the operation of the breathing valve is reached, the atmosphere outside the tank will open the top of the negative pressure valve of the breathing valve. Open, so that the outside air enters the tank, so that the pressure inside the tank does not continue to drop, and the pressure inside the tank is balanced with the outside of the tank to protect the safety device of the tank.

principle:

1. When the pressure of the medium in the tank is within the control operating pressure range of the breathing valve, the breathing valve does not work, and the airtightness of the oil tank is maintained;

2. When the medium is replenished into the tank, the pressure in the upper gas space of the tank is raised, and when the positive pressure of the breathing valve is reached, the pressure valve is opened, and the gas escapes from the breathing valve outlet, so that the pressure in the tank is not continued. Increase

3. The atmosphere outside the tank will open the negative pressure valve disc of the breathing valve.

Selection

1. For the requirements of the installation position and the temperature range, for example, all-weather breathing valves should be used in cold areas, and pipeline breathing valves should be used in the pipelines.

2. The control pressure of the mechanical breathing valve should be compatible with the relevant pressure bearing capacity.