In-Tank Emergency Shut-off Valves (TESO)

The primary application of emergency shut off valves is to ensure the safety of storage tanks containing dangerous fluids and gases such as LNG, Chlorine, VCM, VC, Propane, Propylene, or Ammonia. The valves are held open by an air actuator placed on or below the tank. In case of an emergency, the air supply is interupted. A weight or a spring slams the inlying valve shut, securing the tank and its contents.

API 625 Standard for "Tank Systems for Refrigerated Liquefied Gas Storage"

According to the new API 625 Standard double or full containment tanks require the installation of in-tank valves which are to be automatically activated during a loss of electrical power or due to failure of external piping. 
SchuF in-tank valve Model 73BH and Model 73ID achieve the API 625 Standard, designed and installed to prevent gas leakage and any nozzle penetration resulting from external pipe strain.

In-Tank Shut-Off Valves in the workshop

In-tank Valves 73BH in the workshop, Photo: ┬ęSchuF    



Key Advantages of SchuF Tank Valve

  • Valve design that guarentees safety

  • The in-lying valve seal is unaffected by damage to pipework or to the valve itself

  • All valves have bellow sealed spindles

  • Emergency stuffing box is standard

  • Automatic opening by air pressure

  • Emergency handwheel and control accessories are available on request

  • Required to fulfill API 625 Standard for "Refrigerated liquefied gas storage"


In-tank valve 73BH installation
at the bottom of the tank

 In-tank Valve 73BH
in a cigar tank (cross section)

 Tank valve installation inside the tank  In-Tank Valve 73BH installed in cigar tank

Figure 1+2: ┬ęSchuF                                    



In-Tank Shut Off Valve Model Numbers

Model 29 (Bottom Outlet Variant)

Model 73 (Disc or lift plug variant)


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