Ensuring the safety of refrigerated and cryogenic storage tanks requires balanced pressure and vacuum Vacuum Vacuum is the pressure in an enclosed space that is lower than the ambient pressure. protection, emergency venting protection, as well as safeguards against flame transmission. Typical configurations are customized to meet international standards, regulations, and site-specific conditions, ensuring safe and compliant operation of cryogenic storage tanks and protecting infrastructure.

Ammonia Storage Tanks

In ammonia service, rapid thermal shifts and operating transients can generate both overpressure Overpressure Overpressure refers to an increase in pressure in a system or vessel above the normal operating pressure. and vacuum conditions. An engineered system of PROTEGO® pilot operated relief valves, vacuum valves and in-tank valves offer durable, low emission pressure protection measures.​
For interconnected vent lines, a detonation arrester Detonation flame arrester Flame arrester designed to prevent the transmission of a detonation. can be used to prevent flame propagation following potential vapor ignition from sources such as a flare.

Highlights

Comprehensive protection
Specialized components designed for cryogenic storage
Controlled Pressure Relief
Solutions ensure controlled pressure and vacuum relief for safety
Operational Safety
Integrated measures enhance safety in ammonia service applications

Products for Ammonia Storage Tanks

In-Line Detonation Flame Arrester

DA-SB

Explosion Group

IIA1
D / IIA
C / IIB1
C / IIB2
C / IIB3
B / IIB
B / IIC

Vacuum Relief Valve

VN-VU

Vacuum Range:

-2.6 up to -25 mbar

Pressure/Vacuum Relief Valve,

VN-A-PCPF

Pressure Range:

20 up to 1034 mbar

Vacuum Range:

2.2 up to 7 mbar

In-Tank Valve

ITV-S

Protection of LNG 
Storage Tanks

LNG storage requires reliable management of overpressure and vacuum conditions due to rapid temperature changes. This concept offers controlled pressure relief and high-capacity vacuum protection for stable tank conditions during normal and upset events. Detonation protection in the connected line prevents flame transmission, ensuring safe and compliant LNG storage.

Highlights

Pressure Management
Handling rapid temperature changes and pressure fluctuations in LNG storage.
Higher uptime & lower losses
via correct tank breathing and emissions control
Flame Transmission Prevention
Detonation protection prevents flame transmission
Safe LNG Storage
Integrated safety measures ensure compliant and secure LNG storage operations

Products for LNG Storage Tanks

In-Line Detonation Flame Arrester

DA-SB

Explosion Group

IIA1
D / IIA
C / IIB1
C / IIB2
C / IIB3
B / IIB
B / IIC

Vacuum Relief Valve

V/SV-XXL

Vacuum Range:

-2 up to -16 mbar

Pressure/Vacuum Relief Valve

VN-A-PCPM

Pressure Range:

20 up to 1034 mbar

Vacuum Range:

-2.2 up to -7 mbar

Pressure/Vacuum Relief Valve,

VN-A-PCPF

Pressure Range:

20 up to 1034 mbar

Vacuum Range:

2.2 up to 7 mbar

Ethylene Storage Tanks

Ethylene storage tanks need reliable pressure and vacuum control, plus effective explosion Explosion Abrupt oxidation or decomposition reaction producing an increase in temperature, pressure, or in both simultaneously. safeguards for piping. This concept combines high-capacity pressure relief and responsive vacuum relief for stable conditions during normal and upset events. 

In-line detonation protection prevents flame transmission, ensuring a safe and compliant system.

A cutaway 3D rendering of a large cylindrical storage tank filled with liquid, showing multiple red safety valves on the roof connected to a flare stack.
A cutaway 3D rendering of a large cylindrical storage tank with a floating roof, showing multiple red vent/safety devices on top connected by piping to a flare stack.

Propylene Storage Tanks

Propylene service faces rapid thermal shifts, high vapor pressure, and operating transients that can cause overpressure and vacuum conditions. This concept offers controlled pressure relief, responsive vacuum protection, and emergency relief for abnormal events. Detonation protection prevents flame transmission through piping, while inert gas Inert gas Non-flammable gas which will not support combustion and does not react to produce a flammable gas. blanketing stabilizes the annular space and reduces flammable atmosphere risks, ensuring safe and compliant operation.

Highlights

Comprehensive protection
specialized components developed specifically for cryogenic environments
Advanced safeguarding measures
maintaining the integrity and safety of tanks under demanding operating conditions
Safeguarding
against potential explosions through integrated detonation protection
Effective management
of pressure, vacuum, and vapor control across the storage system
A cutaway 3D rendering of a vertical cylindrical storage tank, showing red vent/safety devices on the roof and a small red component at the bottom inside the empty tank.

Protection of LIN LOX LAR Storage Tanks

In LIN, LOX, and LAR cryogenic storage, stable tank conditions are crucial due to low temperatures and rapid pressure changes. This concept provides controlled pressure and vacuum relief, plus emergency pressure relief for normal and upset events. A fast-acting bottom drain function enhances safety during draining and maintenance Maintenance Combination of all technical and administrative actions, including supervision actions, intended to maintain or restore a unit in working order. , ensuring tank integrity and compliant storage.

 LPG Storage Tanks

LPG storage requires effective control of pressure and vacuum conditions, combined with safeguards against flame transmission. The application concept incorporates Pressure and Vacuum Relief Valves Pressure and vacuum relief valve A pressure and vacuum relief valve is a pressure equalization valve for impermissible pressure and vacuum in a closed system. , In-Tank Valves, and in-line Detonation   Flame Arresters Flame Arresters A flame arrester, deflagration arrester, or flame trap is a device or form of construction that will allow free passage of a gas or gaseous mixture but will interrupt or prevent the passage of flame. to support stable operation and protect the tank during both routine service and abnormal conditions.

A cutaway 3D rendering of a large storage tank filled with liquid, showing red vent/safety devices on the roof and piping leading to a flare stack with a flame.

Highlights

Safeguarding
against potential explosions 
Reduced product losses
and emissions
Supports safe low-temperature operation 
with documented compliance
Process opimization
cradle to grave project engineering support

Products for Refrigerated and Cryogenic Applications

  • Vacuum Relief Valve

    VN-VU

    Vacuum Range:

    -2.6 up to -25 mbar
  • Emergency pressure relief valve

    ER/V

    Pressure Range:

    5 up to 40 mbar
  • Vacuum Relief Valve

    V/SV-XL

    Vacuum Range:

    -2 up to -16 mbar
  • Pressure/Vacuum Relief Valve

    PM-HF

    Pressure Range:

    10 up to 1034 mbar

    Vacuum Range:

    -2.2 up to -7 mbar
  • In-Tank Valve

    NB/AP

  • In-Line Detonation Flame Arrester

    DA-SB

    Explosion Group

    IIA1
    D / IIA
    C / IIB1
    C / IIB2
    C / IIB3
    B / IIB
    B / IIC
  • Pressure/Vacuum Relief Valve,

    VN-A-PCPF

    Pressure Range:

    20 up to 1034 mbar

    Vacuum Range:

    2.2 up to 7 mbar
  • In-Tank Valve

    ITV-S

  • Blanketing Valve

    ZM-R

    Pressure Range:

    up to 500 mbar

    Vacuum Range:

    up to -200 mbar

    We would like to express our gratitude to the PROTEGO® team for the extraordinary support provided to us in identifying and resolving the trouble of a premature opening of one of our ammonia tank safety valves. Your flexibility in dealing with the subject, the displayed sense of urgency, and immediate and professional hands-on approach are exceptional and clearly distinguish you from other OEMs in the industry. 

    Head of Operations & Maintenance & Engineering Manager

    Linde Jubail Industrial Gases Factory LLC