UNI EN 257:1994被替代
Mechanical Thermostats For Gas-burning Appliances
出版：Italian Standards
专家解读视频
Describes the construction and performance requirements for mechanical thermostats for gas applications. Establishes the definitions, test conditions and marking. Applies to mechanical thermostats controlling the gas flow directly or indirectly through an integral gas valve, and which do not require external electrical energy for their operation. Applies to thermostats for all gas appliances. Excludes thermostats used with gas appliances installed in the open air.
1994 Edition re-issued in Jan 1998 and incorporates AMD 1 1998. (03/2008)
NEN EN 257:2010 - Identical
ONORM EN 257:2010 - Identical
SN EN 257:1997 - Identical
NEN EN 257:1994 - Identical
ONORM EN 257:1996 - Identical
DIN EN 257 (1996-08) - Identical
BS EN 257:1992 - Identical
NBN EN 257:1992 - Identical
I.S. EN 257:1992 - Identical
NF EN 257:1992 - Identical
NS EN 257:1992 - Identical
SS EN 257 Ed. 1 (1992) - Identical
UNE EN 257:1994 - Identical
