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BSI 21/30436333 DC:2021 Edition

BSI 21/30436333 DC:2021 Edition

$13.70

BS ISO 23551-9. Safety and control devices for gas burners and gas-burning appliances. Particular requirements – Part 9. Mechanical gas thermostats

Published By Publication Date Number of Pages
BSI 2021 34
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This document specifies safety, construction, performance and testing requirements for mechanical gas thermostat intended for use with gas burners and gas burning appliances hereafter referred to as “thermostats”.

This document covers type testing only.

This document applies to mechanical gas thermostats of nominal connection sizes up to and including DN 50 with declared maximum inlet pressures up to and including 50 kPa, for use with natural gas, manufactured gas or liquefied petroleum gas (LPG). It is not applicable to corrosive and waste gases.

This document 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;

  • used on gas appliances where the thermostat is not directly exposed to the outdoor environment; and

  • which are intended for operating control functions.

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BSI 21/30436333 DC
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