TECO gas

Excess flow valve

Safety in the event of failures according to TECO
Starting from its extensive experience in Germany, where safety devices are compulsory since the ‘90s, TECO has developed and certified simple, automatic and reliable safety equipment.
With a minimal investment, Teco was able to remarkably improve the safety level of the gas network. In particular, it developed TECO GST®; safety device against excess flow in the event of piping failure, faulty connection to utilities, earthquakes or voluntary alterations. Therefore, the device automatically shuts off the gas flow whenever the pre-set maximum flow rate is accidentally exceeded in the event of a sudden gas leak from the system. The device is reset automatically after normal operating conditions are restored. GST® is a safety device integrated in shut-off and meter valves, minimizing the space occupied and boosting the performances of the same shut-off valve, which becomes a passive safety device of the installation.

Applied technologies GST®

Icona GST®
Logo GST®
Safety device excess flow valve
Logo Mounting position
Mounting position


GST® immediately shuts off the gas flow through the pipe whenever the pre-set maximal flow rate is accidentally exceeded. The device was planned to be installed both horizontally and vertically. GST® is available as single fitting and as integrated component in valves.

GST® Range

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Technical datasheet GST®
DVGW VP305-1 DVGW VP305-1
GST Series certified
Reference NormsDVGW VP305-1
Operating pressure15-100 mbar
Operating temperature-20°C +60°C
Pressure drop< 0,5mbar
VL overflow value10-30 lt/h a 100mbar (air)
Fs min1.30
Fs max1.45
Connectionsthreaded according to EN 10226-1
Fields of use
for all types of gas as specified in
EN 437 and DVGW G260/1
(Methane, Butane, Propane)
Heat resistance200°C

Documents GST®

Applied technologies GST®

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