QRA50M 燃烧器专用火焰探测器 光电管 电眼 SIEMENS西门子
The flame detectors are used for the supervision of gas flames, yellow- or blue-burning oil flames and for ignition spark proving. High sensitivity.
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With this type of flame supervision, the UV radiation emitted by gas or oil flames is used to generate the flame signal.
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The radiation detector c***ists of a UV-sensitive cell with 2 electrodes, which ignite when illuminated with radiation in the 190...270 nm range of the spectrum, thereby triggering a current in the flame detector circuit.
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The UV cell does not respond to glowing firebrick in the combustion chamber, daylight or light from the boiler room illumination.
The die-cast alloy flame detector head is sealed with a quartz-glass lens. In addition to the plug-in UV cell, the head contains a rotating shutter which – for the purpose of continuous testing of the UV cell’s striking and extinction voltage performance – interrupts the UV radiation at the rate of 3 times per second. The shutter is driven by a synchronous motor which is suited for continuous operation.
The flame detector is attached to the viewing tube by means of a flanged mounting coupling which has a 1 in. internal thread. A 3/8 in. tapping on the side of the coupling enables a cooling air conduit to be connected, provided that dry, dust- and oil-free compressed air is ***ailable.
技术参数
主要参数UV单元平均寿命10000小时（在50oC）
炉膛背压500mbar***大
保护等级IP54
重量750g
环境条件运输环境IEC 60 721-3-2
内部条件class 2K2
机械条件class 2M2
温度范围-55...+50oC
湿度<95%
运行环境IEC 60 721-3-3
内部条件class 3K5
机械条件class 3M2
温度范围-20...+50oC
湿度<95%
不得进水
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旺旺:wellpat
电话：0755-27675552，13670021005,13670007925
EMAIL:wellpat@
***：2230751716，2399181104;
