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Breathing valve working principle analysis
Source: | Author:zhongdeen | Publish time: 2015-08-25 | 1470 Views | Share:
Breather valve is fixed on top of the tank ventilation, to ensure the normal state of tank pressure, prevent tank overpressure or vacuum tank damage, can also reduce tank liquid volatilization losses. Breathing valve can not only maintain tank pressure balance, ensure that tank damage when overpressure or vacuum, and can reduce tank medium and wear and tear.

Breathing valve working principle is to use spring limit valve plate, or determined by the positive and negative pressure or breath. Breath valve should have discharge function of two aspects of positive pressure and negative pressure, specific: when the container is under pressure, the respiration valve open breath gas discharge positive pressure; When container under negative pressure, the respiration valve open suction gas discharge pressure. Thus guarantees the pressure within a certain range, ensure the safety of the container. Is a certain pressure, or to breath. Another is designed not only pure breath. Can understand to use two appropriate pressure one-way valve to replace.

The working principle of all kinds of breathing valve:

Breathing valve resistance gas drainage effect in steam heating system, select the appropriate breathing valve, can make the steam heating equipment to achieve the highest efficiency. If you want to achieve the ideal effect, on the performance and characteristics of various types of breathing valve to conduct a comprehensive understanding.

A wide variety of breathing valve, each with different performance. Choose the respiration valve, the first elected its features can best meet the steam heating equipment operation, before considering other objective conditions, so choose what you need breathing valve is correct and effective. The respiration valve to be "identified" steam and condensate, can have vapor barrier drainage effect. "Identified" steam and condensate is based on three principles: density difference, temperature difference and phase transition.

Pipe flame arrester is the use of water and steam density difference, through the water level change, make the float lifting drive valve open or closed, to achieve the vapor barrier drainage. Mechanical type of trap super-cooling degree is small, not affected by working pressure and temperature change, there are water, no water in the heating equipment, can make the heating equipment to achieve optimum thermal efficiency. Maximum back pressure rate was 80%, the high quality of work, is the most ideal production process heating equipment of breather valve

GTQ type ventilation tube structure is simple, the internal only one clinical activity components of fine grinding stainless steel hollow ball, is both a float and open-close part, no quick-wear part, long service life.

Equipment has just started work, the air in the corrugated pipe flame arrester through Y series automatic air discharge device, low temperature condensate into the respiration valve, the water level rise, floating ball, valve opens and the condensate discharge rapidly, steam quickly into equipment, equipment rapidly, Y series automatic air discharge device of liquid thermal expansion, automatic air discharge equipment shut down. Breathing valve began to work properly, the float along with the water level fluctuation, vapor barrier drainage. When the device has just started, GZW -i resistance deflagration flame arrester pipe air in the pipe and low temperature condensate through tubes into the respiration valve, the valve inside the bimetallic strip emptying element barrel bounce off the ball, the valve opens, air and water flowing rapidly at low temperature. When steam into barrels a ball, the ball upward buoyancy bucket, at the same time, the temperature inside the valve, bimetallic strip emptying element contraction, the ball tong floats to the valve, the valve closed. When the ball the steam into the condensate inside the bucket, bucket loses buoyancy sinking, the valve opens and the condensate discharge quickly. When steam again into the ball barrels, the valve closed again, discontinuous and continuous work.

When the device has just started, air in the tank wall manhole pipe and low temperature condensate into the trap, inverted bucket down on its own weight, inverted bucket connecting lever drives the valve core to open the valve, air and water flowing rapidly at low temperature. When the steam into the inverted bucket, the inverted bucket steam generate upward buoyancy, inverted bucket up connecting lever drives the valve core to close the valve. Inverted bucket to open a small hole, when a part of the steam from a small hole, the other part of the steam condensate, the bucket loses buoyancy, sink under their own weight and inverted bucket connecting lever drives the valve core to open the valve, work cycle, intermittent drainage.

Air foam generator has two isolation valve cavity, two stainless steel tubes connected by upper and lower valve chamber, it is by the ball float and the combination of the inverted bucket type breather valve, the valve structure of advanced and reasonable, in the heat, high pressure and small load working conditions, to be able to timely discharge superheat disappear when the formation of the condensate, effectively prevent leakage of superheated steam, high quality of work. Maximum allowable temperature is 600 ℃, the body as a whole stainless steel, the seat for hard alloy steel, long service life, is superheated steam is special breathing valve, obtained two national patents, filled the domestic blank.

When the condensate into the valve cavity, pair of valve ball float liquid level rise, floating ball closed into the steam pipe hole. Water by the water conduit to rise to the main valve cavity, inverted bucket by gravity drop, drives the valve core to open the main valve, discharge frozen water. Vice valve cavity when the water level falls, floating ball with the liquid level drops, the deputy valve to open. On the steam from the steam pipe into the inverted bucket, the main valve cavity upward buoyancy inverted bucket, bucket drives the valve core to close the main valve. Vice valve cavity when the water level rises, the next cycle began, intermittent drainage.