The breathing valve is a ventilation device fixed on the top of the storage tank to ensure the normal state of the pressure in the tank and prevent the tank from being damaged due to the overpressure or the vacuum caused by the overpressure or the vacuum, and also to reduce the liquid volatilization loss in the tank. The breather valve not only maintains the pressure balance of the tank, but also ensures that the tank is destroyed when overpressured or under vacuum, and reduces tank media and wear. The working principle of the respiration valve is to use the spring limit valve plate, which is determined by the positive and negative pressure or call or inhale. The respiration valve should have the function of discharging the positive pressure and the negative pressure. Specifically, when the container is under positive pressure, the breathing valve opens and exhales Gas discharge positive pressure; When the container to withstand negative pressure, the breathing valve opens suction gas discharge negative pressure. This ensures that the pressure in a certain range, to ensure container safety. One is to reach a certain pressure, the call or suction.Other is designed to simply call non-suction can be understood as two appropriate pressure check valve instead. The working principle of a variety of breathing valve: breathing valve in the steam heating system to play the role of gas blocking drainage, select the appropriate breathing valve, steam heating equipment can achieve maximum efficiency. In order to achieve the best results, it is necessary to work on all types of breathing valve performance characteristics of a comprehensive understanding. Breathing valve many varieties, each with different properties. The selection of breathing valve, the first choice should be its characteristics to meet the best operation of steam heating equipment, and then consider other objective conditions, so you need to choose the right breathing valve is correct and effective. Breathing valve to be able to "identify" steam and condensate in order to play the role of blocking gas drainage. "Identifying" steam and condensate is based on three principles: density difference, temperature difference and phase transition. Pipe flame arrester is the use of the density difference between condensate and steam, through the condensate level changes, so that the float lift valve to open or close to achieve the purpose of blocking steam drainage. Mechanical type of small degree of supercooling traps, free from pressure and temperature changes, the water that is row, no water heating equipment, heating equipment can achieve the best heat transfer efficiency. The maximum back pressure rate of 80%, high quality work, the production process is the best heating equipment breathing valve. The structure of GTQ vent tube is simple, there is only one stainless steel hollow float finely ground within the movable part, which is not only the float but also the opening and closing parts, non-wearing parts and long service life. When the equipment is just started to work, the air inside the corrugated flame arrester pipe is discharged through the Y series automatic exhaust air device, the low temperature condensate enters the breathing valve, the condensate water level rises, the float rises, the valve opens, the condensate drains rapidly, the steam Quickly access the equipment, equipment, rapid heating, Y series of automatic exhaust air temperature of the liquid expansion device, automatic exhaust air device is turned off. Breathing valve began to work properly, the float with the condensate level rise and fall, block steam drainage. When the device just started, GZW-I detonation deflagration flame retardant pipe air and low temperature condensate water through the launch tube into the breathing valve, the valve bimetal emptying elements to open the ball bucket, the valve open, the air and Cryogenic condensate quickly discharged. When the steam enters the bucket, the bucket produces upward buoyancy, while the temperature inside the valve rises, the bimetallic emptying element contracts and the ball is poled toward the valve port and the valve is closed. When the steam inside the bucket becomes condensed water, the bucket loses its buoyancy and sinks, the valve opens and the condensate drains quickly. When the steam enters the barrel again, the valve is closed again, intermittently and continuously. When the device is just started, the air inside the manhole pipe of the tank wall and the low-temperature condensate water enter the steam trap. The inverted bucket falls by its own weight, the inverted bucket connects the lever to drive the valve core to open the valve, and the air and the low-temperature condensed water are rapidly discharged. When the steam enters the inverted bucket, the steam in the inverted bucket generates upward buoyancy, and the inverted bucket rises to connect the lever to drive the valve heart to close the valve. Inverted bucket has a small hole, when part of the steam discharged from the hole, the other part of the steam condensate generated, the inverted bucket loses its buoyancy, by its own weight to the sink, inverted bucket connected lever to open the valve heart valve, circulation Work, intermittent drainage. Air bubble generator has two isolated valve cavity, the two stainless steel pipe connected to the upper and lower valve cavity, which is by the float and inverted bucket valve combination of the valve, the valve advanced and reasonable structure, in the overheating, high pressure, light load Under the working conditions, timely discharge of superheated steam disappeared when the formation of condensate, effectively prevent overheating steam leakage, high quality work. The maximum allowable temperature is 600 ℃, the valve body is made of stainless steel and the valve seat is made of carbide steel. It has a long service life and is a special breathing valve for superheated steam. It has obtained two national patents to fill the gaps in the country. When the condensate into the lower chamber, the deputy valve float with the liquid level rise, the float closed into the steam hole. Condensate water pipe up through the main valve cavity, inverted bucket falling by its own weight, driven by the valve core to open the main valve, condensate discharge. When the vice cavity of the condensate water level drops, the float drops with the liquid level, deputy valve open. The steam enters into the inverted bucket from the inlet pipe into the upper main valve cavity, and the inverted bucket produces upward buoyancy. The inverted bucket drives the valve core to close the main valve. When the secondary valve cavity condensate water level then rise, the next cycle began again, intermittent drainage.