Product Catalog
Single Exhaust Breather Valve
Single Exhale Valve is a type of tank accessory with only gas exhaust function. When the internal tank pressure exceeds the set value, the valve disc opens to discharge gas inside the tank (process gas / nitrogen), and it will automatically close once the pressure drops back to normal.
- Parameters
- Drawing
- Application areas
Working Principle
Positive Pressure Exhaust: When the internal tank pressure exceeds the set positive pressure, the pressure disc opens to vent oil and gas inside the tank, and the valve closes as pressure falls back.
Sealed Standby: Under normal operating pressure, the disc is sealed by its own weight or spring force to isolate the atmosphere and reduce medium volatilization.
Applicable Standards
SY/T 0511.1-2024, Vertical Cylindrical Steel Welded Storage Tank Accessories — Part 1: Breather Valves
API Standard 2000, Venting of Atmospheric and Low-Pressure Storage Tanks (Standard for high-flow breather valves)
Product Features
Low opening-closing differential pressure; the lift height reaches at least 1/3 of the breather valve’s nominal diameter.
Equipped with high-quality springs featuring outstanding anti-fatigue performance.
Multiple optional materials available for valve seat and valve plug, applicable to various working conditions.
Both valve plug and valve seat assemblies are field-replaceable.
Certified discharge curves compatible with all product sizes.
Flange standards can be selected as per customer requirements (GB, HG, ANSI, DIN, GOST).
Parameter
| Parameter Item | Standard Value | Optional / Remarks |
|---|---|---|
| Nominal Diameter | DN50 ~ DN400 | Common sizes: DN80/100/150/200 |
| Type | Single Exhale Valve, Exhale Nozzle Type | Select according to medium type |
| Standard Model | API 2000 Type, Model 0511 | API 2000 is international high-flow type |
| Set Pressure | Exhale: Max. 100 kPa | Conventional value |
| Housing Material | Carbon Steel (Q235, WCB), 304, 316L, Aluminum Alloy, Steel lined with PTFE | 316L is recommended for anti-corrosion working conditionL |
| Disc Material | Aluminum Alloy, 304, 316L | Light weight, superior sealing performance |
| Sealing Elements | PTFE, FKM (Fluoroelastomer) | Excellent oil and solvent resistance |
| Flange Standard | Flanges compliant with GB, HG, ANSI, DIN, GOST | Non-standard customization available |
| Optional Accessories | Flame arrestor function, heat tracing function | Select according to medium characteristics |
| All data above are for reference only. Please contact us for detailed parameters. | ||
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