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PTFE Lined Breather Valve

PTFE Lined Breather Valve

Product material: stainless steel, carbon steel, cast steel
Scope of application: water, steam, oil
Connection method: flange, clamp, welding
Caliber: 50-1000 (mm)


Polytetrafluoroethylene (PTFE) Lined Coils, widely recognized as "The King of Plastics," stand out in the industry for their unparalleled temperature resistance and corrosion resistance capabilities. These innovative products embody the pinnacle of chemical engineering technology, offering a robust solution for handling highly aggressive and corrosive substances. The unique properties of PTFE, including its virtually universal chemical resistance, exceptional thermal stability, and non-stick surface, make it an indispensable material in a broad range of industrial applications, from chemical processing to pharmaceuticals and beyond. The introduction of PTFE Lined Coils has revolutionized the way industries deal with challenging fluids by providing a reliable and durable means of containment and transport.

Product Description

At the heart of the PTFE Lined Breather Valve's design is its dual functionality, which effortlessly manages the internal pressure of storage tanks. Comprising several key components – the valve seat, cover, protective casing, valve disc, guide rod, springs, spring seat, and sealing ring – each part plays a critical role in the valve's operation.

Valve Seat and Cover: These components form the primary sealing surface, ensuring a tight seal when the valve is closed to prevent leaks and unauthorized entry into the tank.

Protective Casing: This exterior layer not only protects the internal mechanisms from external elements but also ensures that the valve operates effectively under various environmental conditions.

Valve Disc: This is where the action happens. The valve disc acts as the gatekeeper, opening or closing based on the internal pressure levels of the tank. It's precisely engineered to respond at set pressure thresholds, either venting excess gas to reduce pressure or allowing air in to prevent a vacuum.

Guide Rod, Springs, Spring Seat, and Sealing Ring: These components work together to provide the necessary force and guidance for the valve disc to operate smoothly and reliably. The springs ensure that the valve disc returns to its original position after either venting gas or admitting air, maintaining the system's integrity and readiness for the next cycle.

In operation, the PTFE Lined Breather Valve automatically adjusts to the changing pressures within a storage tank. When the internal pressure exceeds the predetermined limit, the pressure valve disc lifts, allowing excess gas to escape. Conversely, if the internal pressure drops too low, creating a vacuum, the vacuum valve disc opens to let air in. This balance is crucial not only for maintaining the structural integrity of the tank but also for minimizing the evaporation of stored liquids, thereby preserving the quality and quantity of the contents.

Crafted with a lining of Polytetrafluoroethylene (PTFE), known for its exceptional chemical resistance and stability, these valves are suited for a wide range of applications, from aggressive chemicals to sensitive substances. The PTFE lining ensures that the valve components remain unaffected by the materials they come into contact with, extending the valve's lifespan and reducing the need for frequent maintenance.

Key Features

Chemical Resistance

A standout feature of the PTFE Lined Breather Valve is its exceptional chemical resistance, courtesy of its PTFE lining. Polytetrafluoroethylene, or PTFE, is famed for its ability to withstand a vast array of chemical substances, making these valves particularly suitable for use in environments where corrosive materials are handled. Whether your storage tanks contain acids, alkalis, solvents, or any other aggressive chemicals, the PTFE lining ensures that the valve's functionality remains uncompromised. This resilience against chemical attack not only preserves the integrity of the valve but also ensures the safety and purity of the substances within the tank.

Dual Functionality

The dual-function mechanism of the PTFE Lined Breather Valve is a marvel of engineering, designed to maintain optimal pressure levels within storage tanks. This ingenious system allows the valve to vent gases when internal pressure rises above set thresholds, effectively preventing overpressure conditions. Conversely, should the tank pressure drop below the desired level, creating a vacuum, the valve admits air from the outside. This balance is crucial for both the structural integrity of the tank and the preservation of its contents, reducing the risk of implosion or explosion, and minimizing liquid evaporation losses.

Advantages of Our PTFE Lined Breather Valve

Enhanced Safety

The PTFE Lined Breather Valve significantly boosts operational safety by preventing tank damage from excessive pressure or vacuum conditions. Its reliable response to fluctuating pressure levels ensures that tanks are neither subjected to stress that could lead to rupture nor to a vacuum that could cause collapse. This proactive approach to pressure management safeguards not only the structural integrity of storage vessels but also the well-being of personnel and the environment. By mitigating the risks associated with overpressure and vacuum conditions, these valves contribute to a safer workplace, giving everyone involved peace of mind.

Economic Efficiency

Beyond enhancing safety, the PTFE Lined Breather Valve also delivers tangible economic benefits. By minimizing the evaporation of stored liquids, the valve directly contributes to loss reduction, ensuring that the quantity of the product being stored or processed is maintained. This is particularly beneficial in industries where the stored substances are valuable or where loss through evaporation could lead to significant financial implications. Moreover, the chemical resistance and durability of the PTFE lining extend the lifespan of the valve, further reducing the need for frequent replacements or maintenance. This combination of factors results in a valve that not only protects your assets but also contributes to the overall economic efficiency of your operations.


Diving into the technical specifications of the PTFE Lined Breather Valve, we find a product designed to meet the most demanding industrial standards. These specifications are the blueprint for safety and efficiency:

Pressure Settings: The valve is calibrated to vent gases when internal pressure exceeds a preset limit, typically set according to the tank's design specifications. The range can be customized but commonly includes settings like 2.5 psi for pressure release.

Vacuum Settings: Similar to pressure settings, the vacuum release is activated at a specific negative pressure point, often set at -2.5 psi, to prevent tank implosion.

Material Properties: The core of the valve features durable metal components, all lined with high-quality PTFE to ensure chemical resistance and longevity. This lining is resistant to a broad range of chemicals and temperatures.

Dimensions: Available in various sizes to fit different tank specifications, from small diameter valves for minor storage to large diameter valves for vast industrial containers.

Operating Temperature Ranges: Designed to operate effectively within a wide temperature range, typically from -20°F to +200°F, making them versatile for different climates and contents.

Accessories and Fittings

To ensure the PTFE Lined Breather Valve operates at peak performance, a range of compatible accessories and fittings is available. These enhance the valve's functionality and facilitate its integration into your existing system:

Flanges: These are essential for mounting the valve securely to the tank, available in various sizes and materials to match your system's requirements.

Gaskets: Providing a tight seal between the valve and the tank, gaskets prevent leaks and ensure the integrity of the contained substance. Made from materials compatible with PTFE, these gaskets offer excellent chemical resistance.

Mounting Kits: For easy installation, mounting kits include all necessary hardware to attach the valve to the tank. These kits are designed for quick setup and long-term reliability.

Protective Screens: These screens can be added to the valve's intake and exhaust ports to prevent debris from entering the valve mechanism or the tank, ensuring clean operation and reducing maintenance needs.


PTFE Lined Breather Valves are a game-changer across a spectrum of industries, safeguarding the integrity of storage tanks and ensuring the purity of their contents. Let's explore a few key areas where these valves are making a significant impact:

Chemical Processing: In the world of chemical manufacturing, where the handling of corrosive and volatile substances is a daily routine, these valves play a crucial role in preventing pressure buildup and ensuring the safety of both the storage facilities and the workforce.

Pharmaceuticals: The pharmaceutical industry relies on the utmost purity and quality of its products. PTFE Lined Breather Valves contribute to maintaining these standards by preventing contamination and protecting sensitive materials from exposure to external air.

Oil and Gas: Given the volatile nature of oil and gas products, maintaining precise pressure levels in storage tanks is non-negotiable. These valves help avoid catastrophic failures due to pressure imbalances, making them indispensable in the sector.

Food and Beverage: While it might not be the first industry that comes to mind, the food and beverage sector benefits from these valves in preserving the quality of liquid products, preventing spoilage, and reducing waste.

Frequently Asked Questions (FAQ) about PTFE Lined Breather Valves

Frequently Asked Questions.png

1.What is the purpose of the breather valve?

Answer: The primary purpose of a PTFE Lined Breather Valve is to maintain safe pressure levels within storage tanks, protecting them from damage due to overpressure or vacuum conditions. By allowing tanks to "breathe," it vents excess pressure when the internal tank pressure exceeds set limits and admits air to prevent vacuum conditions when the pressure drops below the threshold. This functionality is crucial for preventing tank rupture or collapse, ensuring the safety of storage operations and preserving the quality of stored materials.

2.What is the difference between a breather valve and a flame arrestor?

Answer: While both breather valves and flame arrestors are safety devices used in tank systems, they serve different functions. A breather valve is designed to regulate the pressure inside a storage tank, allowing it to vent or admit air as needed to maintain safe internal pressure levels. On the other hand, a flame arrestor is specifically designed to stop the propagation of a flame from the external environment into the tank, protecting against fires and explosions. While a breather valve manages pressure, a flame arrestor provides protection against ignition of flammable vapors.

3.What is a breather valve for a water pipeline?

Answer: In the context of a water pipeline, a breather valve, often referred to as an air release valve, serves to release trapped air or gas from the system to prevent pressure build-up and improve operational efficiency. For water pipelines, these valves are critical for maintaining steady water flow and preventing pipeline rupture due to air entrapment. Although primarily used in gas or vapor environments, the concept in water systems focuses on air release to protect and optimize pipeline performance.

4.What is the standard for a breather valve?

Answer: Breather valves are manufactured and tested according to specific standards to ensure safety and functionality. One of the most widely recognized standards for breather valves is API 2000 (American Petroleum Institute's Standard 2000), which covers venting requirements for petroleum storage tanks. This standard provides guidelines for the design, materials, and testing of breather valves to ensure they perform effectively in maintaining tank pressure at safe levels. Compliance with API 2000 or similar standards is crucial for breather valves to be considered reliable and safe for industrial applications.

5.What is the standard for a breather valve?

Answer: Breather valves are manufactured and tested according to specific standards to ensure safety and functionality. One of the most widely recognized standards for breather valves is API 2000 (American Petroleum Institute's Standard 2000), which covers venting requirements for petroleum storage tanks. This standard provides guidelines for the design, materials, and testing of breather valves to ensure they perform effectively in maintaining tank pressure at safe levels. Compliance with API 2000 or similar standards is crucial for breather valves to be considered reliable and safe for industrial applications.

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