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1、产品名称：产品名称：脉冲式安全阀脉冲式安全阀脉冲式安全阀产品概述：脉冲式安全阀产品概述：GA49H 脉冲式安全阀主要用于电站锅炉、压力容器、减温减压装置等设备，防止压力超过允许最高压力值，保证设备安全运行。结构简述：1、通过杠杆和重锤来平衡阀瓣的压力，使阀门保证密封，移动重锤的位置和改变重锤的重量来达到要求的起跳压力。2、密封面用铁基铬镍不锈钢堆焊而成，阀瓣经热处理，提高了耐磨性和抗冲蚀性。3、阀门上部带有开启和关闭的电磁铁，机械和电器动作互不干扰。安装说明：1、本阀门应与 A49H-4型主安全阀配套使用。2、脉冲安全阀安装时应严格垂直，杠杆应保持水平，与导向叉两侧面间隙必须均匀。3、脉冲安全
2、阀安装之前，应将管路冲洗干净。4、脉冲安全阀引出管与主安全阀的入口管之间应保持一定较长的距离，电接点压力表和主安全阀入口管之间的距离，不得小于5倍主安全阀入口管径，以免主安全阀动作时，因排汽影响电接点压力表和脉冲安全阀工作的正确性。外形尺寸和连接尺寸公称通径 DN(mm)尺寸(mm)DD1D2D3Z-dH1H2LL1Lo251158565584-1490125100100670InstructionInstructionInstructionInstructionThis valve is usedfor power plant boilers, pressure containers,pre
3、ssure andtemperature reducingdevice andother facilitie. Itserve sto preven t th e pressur eexceedingth e highestall owablepressure value andensure the safety of the device whenworking.StructureStructureStructureStructure briefingbriefingbriefingbriefing1. The pressure of the disc is balancedthrought
4、he lever andheavy hammer andthe valve is ensuredsealby movingthe postiton of heavy hammer andchangingthe weight ofheavy hammer to reach the requiredset pressure2. The sealedsurface is made of Fe base stainless steelby over-layingwelding. Throughthermaltreatment,the wear resistance andanti-erosionof
5、disc is improved.3. At the topof valve is equippedanelectromagnet to open andanother to close the valve. The actions of themechanism andthe electric appliance are separate andwillnot affect eachother.InstallationInstallationInstallationInstallation instructioninstructioninstructioninstruction1. This
6、 valve shalllbe usedwithmainsafety valve A49H-4together.2. Impulse sefety valve shallbe installedvertically andthe lever shallbe kept level. The clearance from thelever to bothsides of guide fork shallbe even.3.The pipeline shallbe washedcleanbefore installingimp- ulse safety valve.4.Alongdistance b
7、etweenthe leadingpipe of the impulse safety valve andthe inlet pipe of the mainsafetyvalve shallbe kept.An d the distanc e between the electric contact pressur e mete r and the inlet pip e of the mai n safetyvalv e shall be no less than 5 timesof the diameter of the inlet pipe, for feat that the validity of the meter andthe impulsesafety valve may be affected by the steam releasing process of the mainsafety valve.
