Reliable Breather Valve with Flame Arrester Manufacturer 

At YeeValve, we pride ourselves on being the leading manufacturer of high-quality breather valves with flame arresters in China. With a commitment to excellence and innovation, we provide reliable solutions that ensure the safety and efficiency of your storage tanks and process systems. Our products are designed to meet stringent international standards, including API Std 2000, EN ISO 28300, and ATEX 2014/34/EU, offering superior performance in protecting against excessive pressure and vacuum while preventing flame transmission

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Yee Valve’s Breather Valve Product Lineup

breather valve with flame arrester(breathing) YeeValve

Breather Valve with Flame Arrester(Breathing)

breather valve with flame arrester(suction) YeeValve

Breather Valve with Flame Arrester(Suction)


I. Technical Parameters

II. Working Principle

III. Transport and Storage

IV. Installation

V. Maintenance and Care

VI. Product Sales Service Commitment

I. Technical Parameters

Nominal Diameter DN20 ~ DN300mm (3/4” ~ 12”)
Nominal Pressure PN0.6 ~ 2.5Mpa (150LB ~ 300LB)
Body Material Carbon Steel (CS), SS304, SS316L
Diaphragm Material PTFE, FEP, Silicone Rubber, Viton
Pressure Settings Relief Pressure: +0.3~103.4 Kpa
Vacuum Pressure: -0.3~-82 Kpa
Specification Standard SY/T0511.1-2010

II. Working Principle

The breather valve is designed for use on liquid storage tanks. When the tank is being filled or emptied, the valve disc responds to the preset pressure levels to provide pressure or vacuum relief, preventing the tank from rupturing or imploding. This also reduces evaporation and loss of the tank’s contents.


When the pressure inside the tank balances with atmospheric pressure, both the positive and negative pressure valve discs seal tightly with the valve seat.

  • Positive Pressure Relief: If the tank pressure exceeds atmospheric pressure (positive pressure), the high pressure inside the tank acts on the lower side of the valve disc, overcoming the external atmospheric pressure and valve disc weight, allowing the excess pressure to be released.
  • Negative Pressure Relief: If the tank pressure drops below atmospheric pressure (negative pressure), atmospheric pressure enters through the intake channel, acting on the lower side of the intake valve disc, overcoming the internal tank pressure and valve disc weight, allowing air to enter the tank to balance the pressure.

Positive Pressure Relief

Negative Pressure Relief

III. Transport and Storage

Improper handling and storage of the breather valve from the factory to installation can adversely affect its performance, even rendering it unusable.

  • Packaging: The valve outlet is protected with a plastic cover and the entire valve is wrapped in plastic film, then secured in a wooden crate. Avoid severe vibrations during transport.
  • Inspection: Check new stock for dislodged covers or the presence of moisture and debris. Clean and reseal using wax paper or plastic sheets.
  • Storage: Store in a ventilated, dry place. Do not invert the valve during transport, storage, or installation.

IV. Installation

  • Location: Install the valve at the highest point of the storage tank’s gas space.
  • Multiple Valves: If two valves are needed, install them equidistant from the tank center.
  • Nitrogen-Sealed Tanks: If installing on nitrogen-sealed tanks, position the nitrogen inlet away from the valve exhaust and insert it 200mm into the tank to prevent direct release.
  • Vibration-Free Environment: Install in areas free from vibrations to prevent premature opening or sealing failures.
  • Handling: Handle with care to avoid damage to the sealing surface.
  • Verification: Ensure the nameplate details match the technical requirements before installation.
  • Vertical Installation: Install the valve vertically, ensuring the connecting pipes and media are clean to maintain sealing performance.
  • Pipe Diameter: The installation pipe diameter should be no less than the valve inlet diameter to reduce resistance.

V. Maintenance and Care

  • Regular Inspection: Periodically check for leaks and ensure the valve disc and seat are clean and free of contaminants. Confirm that the guide rod moves smoothly.
  • Manual Testing: Regularly perform manual discharge tests to prevent the valve disc from sticking to the seat.
  • Record Keeping: Maintain a usage log for each valve, including the supplier’s certification and records of repairs, inspections, and adjustments.
  • Outdoor Valves: Protect outdoor valves from rain, fog, dust, and dirt. Implement anti-freeze measures in sub-zero conditions to ensure reliable operation.
  • Pressure Settings: The valves are pre-set to the required opening pressure. For recalibration, send the valve to an authorized inspection station. Recalibrated valves must be sealed and certified.

VI. Product Sales Service Commitment

  • Warranty: The product is warranted for 12 months from the start of use or 14 months from the date of shipment, whichever comes first.
  • Regular Maintenance Reminders: We will periodically remind the user’s maintenance department to inspect and maintain the valves.
  • Faults During Warranty: If faults occur within the warranty period, we will replace the faulty components free of charge. The user must cover the travel and accommodation costs for our service personnel. Outside the warranty period, the user pays only for the replacement parts and associated travel costs.
  • Fault Reporting: If a fault occurs during use, we will respond within 24 hours through remote diagnostics or on-site inspection to resolve the issue.
  • After-Sales Service Contact: For after-sales service, contact us at 0086-19921250077.

Drawing of Breather Valve with Flame Arrester

Why Buy Breather Valves from YeeValve?

Features and Benefits of Purchasing Breather Valves from YeeValve

1. High Flow Capacity

Our Pressure/Vacuum Relief Valves offer high flow rates from a compact design, maximizing efficiency.

2. Versatile Settings

A broad range of pressure and vacuum settings ensures optimal tank protection while minimizing gas losses.

3. Industry Compliance

YeeValve’s breather valves are designed and manufactured to meet API Standard 2000:2014 and EN ISO 28300:2016, which ensures high-quality and reliability for the end-users.

4. Enhanced Sealing

Our valves with superior sealing technology meet the strict requirements of emission control regulations.

5. Exceptional Leakage Control

YeeValve exceed the seat leakage standards set by API Std 2000:2014 and EN ISO 28300:2016, with no measurable leakage below 90% of set pressures and less than 1 SCFH (0.03 m3/h) at 90% of the set pressure.

6. Reduced Evaporation Loss

Our breather valve with Low leakage rates significantly cut down on evaporation losses, preserving more of your product.

7. Cost Savings

With economic benefits arise from minimized product loss from YeeValve breather valves, which enhances overall operational efficiency.

8. Customization Options

We do not only produce standard valves but also provide custom services, such as different connection requests from engineering companies to meet their specific installation needs.

9. Valve Sizing Service

We provide a valve sizing service to ensure optimum valve performance and a cost-effective technical specification to meet our customers’ unique needs.

10. YeeValve Technical Support

YeeValve offers professional technical support to assist with any inquiries or issues, ensuring smooth operation and maintenance.