Excess Flow Safety Valve GSW57
Male > Female thread
Approved acc. DVGW-VP 305-1 (Dec. 2007) in line with TRGI 2008
Body of steel, galvanized
Spring of stainless steel
Guiding part from aluminium
Viton (FKM) O-ring
Operating temperature -20°C to +60°C
Body resistant up to 925°C
Interior resistant up to 200°C
Pressure drop < 0,5 mbar
Spring covered
Overflow hole protected
Remark: Connection load for gas acc. to G260 ΣVGas in m³/h natural gas
Mounted horizontally and vertically upwards:
Type K / locking factor 1.3 ... 1.45