GST® Fitting –female/ male threaded By TECO
Fitting –female/ male threaded version
Excess flow safety device for gas systems.
Excess flow valve
GST® instantly blocks gas flow in the pipeline whenever the closure flow rate (Vs) is accidentally exceeded.
GST® is TECO's commercial name for the excess flow safety device, specified as GS in the German standard (Gasströmungswächter).
TECO developed and manufactures GST since 2002, when the German technical standards for design and installation of gas systems (TRGI) covered excess flow devices.
Standard and certification: DVGW VP305-1:12/2007 DVGW TRGI 2008 DVGW TRF 2012
Pressure: 15-100 mbar
Temperature: -20 °C +60 °C
Application: For all types of gas as specified in EN 437 and DVGW G260/1 (Methane, Butane, Propane)
Pressure drop: ≤ 0.5 mbar (50 Pa)
Overflow value VL: 37.5 l/h at 100 mbar (gas)
Fs min: 1.30
Fs max: 1.45
External heat resistance: 925 °C for 60’
Internal heat resistance: trip at 120 °C / 200 °C for 10’