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Gas valve not opening during start-up
degree of protection IP54
the valve is normally closed for continuous and cyclic operation
manual limitation of flowing gas volume by adjusting main volume
For intermittent operation
Siemens QRA53.E17 UV Flame Detector - Self Checking Gas Valve Gas valve not opening duringSiemens QRA53. E17 UV Cell (110v) Includes Mounting Clamp The detectors UV cell is located behind a swivelling shutter at the front end of the detector tube which is flanged to the housing. A quartz glass window protects the tube and the shutter against dirt. The detectors housing accommodates a stepper motor to drive the shutter and the electronics to control the shutter. Using the AGG16. C adapter, this flame detectors can be mounted either directly
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