The all-weather breather valve (pressure vacuum valve) is a vital safety fitting for storage tanks. It works steadily under extreme temperatures, balancing tank pressure, cutting medium evaporation and delivering fire & explosion protection. This article elaborates on ZhenChao’s product to help users learn its performance and application in harsh conditions.
The all-weather breathing valve is a typical pressure vacuum valve, which adopts a double valve disc structure to realize bidirectional pressure adjustment. When liquid is injected into the tank or the environment is heated, the gas in the tank expands and the pressure exceeds the set value, and the positive pressure valve disc lifts to vent the gas outward, preventing the storage tank from being damaged by overpressure; When the liquid is pumped out or the environment is cooled, the gas in the tank shrinks and forms a vacuum, and the negative pressure valve disc opens to suck in the outside air to avoid the storage tank from collapsing due to negative pressure. Under normal pressure, the two sets of valve plates are tightly closed, effectively reducing the leakage and evaporation loss of the medium.
ZhenChao‘s all-weather breathing valve uses the principle of steam heat transfer to design the anti-freezing structure, and the core sealing parts are made of polytetrafluoroethylene, which is resistant to low temperatures and frost. The internal flow passage is optimized to avoid water vapor from condensing and freezing at the valve seat and valve disc. The built-in anti-static device in the valve can keep the valve body and the storage tank at the same potential, eliminating the risk of static electricity. The overall structure is concise, the throughput is large, and it can maintain stable operation in continuous low or high temperature environments.
Three, the core advantages of the ZhenChao all-weather breathing valve
The all-weather breathing valve is suitable for an environmental temperature range of -40°C ~ +60°C. The special anti-freezing structure and Teflon seal can prevent the valve from freezing in extremely cold environments, and the high-temperature parts can avoid aging and deformation in high-temperature conditions. Faced with the large temperature difference and frequent alternation of heat and cold in the four seasons, its operation stability is far better than the ordinary breathing valve that is prone to failure in severe cold and high temperature environments.
The sealing effect of ZhenChao products is excellent, and the valve seat with precise fitting can control the valve seat leakage in the range of close to the set pressure value, and the gas tightness is excellent. The valve body can be selected from a variety of corrosion-resistant materials such as WCB, SS304, SS304L, SS316, and SS316L, which can resist the erosion of petrochemical media such as gasoline, kerosene, and diesel, greatly extending the service life of the valve in industrial scenarios.
In addition to the basic pressure adjustment function, this pressure vacuum valve integrates a flame arrester device, which has flame arrester and explosion-proof capabilities, can block the spread of flames, and can prevent the occurrence of explosion accidents in flammable and explosive medium storage tanks. The standard anti-static structure eliminates the risk of static electricity during gas exchange. It integrates pressure adjustment, anti-freezing, fire prevention, and anti-static functions, fully meeting the high-standard safety requirements of petrochemical storage tanks.
The ZhenChao all-weather breathing valve is divided into four pressure specifications, suitable for different storage tank design requirements, of which the B type is the standard pressure for normal conditions.
Pressure Model | Positive Pressure | Negative Pressure | Applicable Scenario |
Type A | +355 Pa (+36 mm H₂O) | -295 Pa (-30 mm H₂O) | Small, low-pressure storage tanks |
Type B +980 Pa (+100 mm H₂O) -295 Pa (-30 mm H₂O) Standard petrochemical storage tanks (standard model) | +980 Pa (+100 mm H₂O) | -295 Pa (-30 mm H₂O) | Standard petrochemical storage tanks (standard model) |
Type C | +1950 Pa (+200 mm H₂O) | -295 Pa (-30 mm H₂O) | Large, medium-to-high-pressure storage tanks |
Type D | Customized pressure | Customized pressure | Customized for special operating conditions |
The valve body and shell support multi-material selection, suitable for different media and environments; the flange connection is compatible with domestic and foreign mainstream standards, and can be seamlessly connected with various pipes.
Category | Available Specifications |
Valve Body Material | WCB, SS304, SS304L, SS316, SS316L |
Shell Material | HT, AL, A3, 18-8, 304, 304L, 316, 316L |
Flange Standard | HG/T20592-2009, HG/T20615-2009, ANSI B16.5, HG20592-97 PN1.0 (Customization available) |
This all-weather pressure vacuum valve focuses on the four major industries of petroleum, natural gas, petrochemical, and power generation, and is widely installed in fixed-top storage tanks, large and medium-sized petrochemical pipelines, and power plant auxiliary equipment. It is also suitable for storage facilities for special petrochemical materials such as aromatics and sulfur.
Q1: Are there any other names for the all-weather breathing valve?
A1: Also known as a pressure vacuum valve.
Q2: What is the working temperature range of the ZhenChao all-weather breathing valve?
A2: -40℃ ~ +60℃。
Q3: What are the core functions of this all-weather breathing valve?
A3: Pressure balance, anti-freezing, fire prevention, anti-static.
Q4: What pressure specifications are available for the product?
A4: There are three standard models, A, B, and C, and a customizable D model.
Q5: What kind of media is this valve suitable for?
A5: Petroleum, diesel, kerosene and other petrochemical media.
Boasting great performance and full specifications, the ZhenChao all-weather breather valve suits various industrial fields. Are you interested in parameters or customized solutions? Just leave a message and we will reply to you promptly!
