Isolation solenoid valves are used in natural gas fuel lines to enable or disable flow as part of an automated control system. This is often a safety-related requirement where reliable and prompt closure is essential to ensure that the flow of fuel is suspended quickly in the event of power failure for example. Valves for these applications are frequently required to conform to EN161:2002 specification that replaces the older EN161:2001 and BS EN161:1991 specifications concerning automatic shut off valves for gas burners and appliances.
Many solenoid valves carrying EN161 certification are available in automatic or manual reset functions from ¼” to 6” and for pressures up to about 500mBar. Red Dragon Valve offers direct-operated solenoid valves with EN161 certification up to DN200 and pilot-operated valves up to DN300 with ATEX Ex n Category 3 Zone 2 & 22, Ex de Category 2 Zone 1 & 21 or Ex me Category 2 Zone 1 certification for hazardous area installations. Pressure ranges from 200mBar to 40Bar allow the use of these valves in critical gas trains for boilers, furnaces or gas turbine applications amongst many others. Additional options such as position indication limit switches for electrical feedback and automated control systems provide valve condition monitoring for optimum plant efficiency.
These valves are specified and supplied separately or as part of custom-designed, assembled and tested gas trains ready for installation.
