Breather Valve Installation instructions Air Evacuation Valve Role purpose Evacuation Valve performance characteristics

July 13, 2022

The Breather Valve consists of a pressure valve and a vacuum valve, installed on the vent pipe of the cargo tank, which can automatically open and close with the change of positive and negative pressure of the oil and gas in the cargo tank, so that the difference between the air pressure inside and outside the cargo tank is kept within the allowable range.

Installation instructions: 1. It's important to remove the package and read the instructions.

2. When hoisting the breathing valve, appropriate lifting tools should be selected to avoid damage to the protective cap of the breathing valve disc.

3. Check the coaxiality and perpendicularity of the pipe flange on the tank or water tank, which is essential for the proper use of the pressure and vacuum relief valve (breathing valve).

4. Check the waterline surface of the pipe flange on the tank or water tank. It must be clean, free of scratches, corrosion, tool marks, and flat.

5. Remove protective covers and other packing materials for flange ports.

6. Check the gasket; Make sure the material is suitable for application.

7. Use the bolt circle to center the gasket.

Role purpose: Breathing valve is a safe and energy-saving product to maintain the pressure balance of storage tank and reduce the volatilization of medium. Breathing valve makes full use of the bearing capacity of storage tank itself to reduce the discharge of medium. Its principle is to use the weight of positive and negative pressure valve plate to control the positive exhaust pressure and negative suction pressure of storage tank. When the pressure of the medium in the tank is within the range of the control operating pressure of the breathing valve, the breathing valve does not work to maintain the tightness of the tank; When the tank to add medium, so that the tank upper gas space pressure, to achieve the breathing valve operation positive pressure, pressure valve is opened, gas from the breathing valve exhalation outlet escape, so that the pressure in the tank no longer continue to increase; Beyond can take out medium, make the tank top gas pressure drop of the space, achieve the respiration valve operating pressure, open the atmosphere outside the tank will be breathing valve open the suction valve plate, the gas into the tank, the tank pressure is no longer continue to fall, let the tank and tank pressure balance, to protect the safety of the tank.

The working principle of Breather valve is a safe and energy-saving product to maintain the pressure balance of storage tank and reduce the volatilization of medium. Breathing valve makes full use of the bearing capacity of storage tank itself to reduce the discharge of medium. Its principle is to use the weight of positive and negative pressure valve plate to control the positive exhaust pressure and negative suction pressure of storage tank

The choose of Evacuation Valve: 1, the requirements of the installation position and temperature range, such as cold areas should be used all-weather breathing valve, and installed in the pipeline should be used in the pipeline breathing valve.

2. The control pressure of mechanical breathing valve should be adapted to the related bearing capacity.

3. The specifications of mechanical breathing valve (flange diameter) should meet the requirements of the maximum flow of oil breathing gas in and out of the oil tank.

The performance characteristics of Evacuation Valve: The valve body of the breathing valve can withstand the water pressure of 0.2mpa, without infiltration and deformation. When the relative humidity of the air is greater than 70% and the minimum temperature is -30℃, after 24 hours of freezing, the opening pressure of the valve disc meets the working pressure requirements (the allowable pressure difference is plus or minus 20Pa). The valve disc parts of GTQ ventilator have high sensitivity when operating, and seal is guaranteed after operation. The breathing valve has enough space in the valve to ensure the ventilation of the tank. Breathing valve does not reach the working pressure before: nominal diameter ≤150mm, the leakage is ≤0.04m3/h; Nominal diameter ≥220mm, the leakage is ≤0.4m3/h; When the breathing valve reaches the working pressure: the disc is opened immediately to ensure the normal ventilation requirements of the tank.

Features and performance: New pipe flame arrester material: cast iron, cast steel, stainless steel, aluminum alloy, good corrosion resistance. The disc and seal ring are made of stainless steel tetrafluoroethylene. Low temperature resistance, good anti-freezing performance. The valve is a ventilation device installed on the fixed top tank to reduce the evaporation loss of oil and control the pressure action of the tank. The valve has large ventilation, small leakage, corrosion resistance, good anti-freezing performance. It can automatically adjust the pressure inside and outside the oil storage tank. Gas flame arrester simple structure, light weight, easy maintenance, convenient installation. Water pressure test passed. Low temperature resistance and frost resistance qualified: the pressure disc, vacuum disc and sealing ring have no deformation after operating at -42℃ for 2 hours. Fully meet the standard requirements. In normal temperature 36℃ continuous operation for 72 hours, 10000 times, pressure disc, vacuum disc and guide rod contact surface without any wear and collision signs, guide rod lifting sensitive without stuck phenomenon.

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zheng@rmiplast.com

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