温水锅炉止回阀的作用是使水在管路中只能向一个方向流动,也就是能自动阻止水向相反方向流动。1992年3月间由于新造和厂修车上用的止回阀在低压差时产生漏泄,达不到规定要求,成为当时交验车辆的关键。针对此问题进行了现场调查及分析,判断认为造成止回阀漏泄的主要原因是由于阀杆与三爪阀组成后不同心,当三爪阀上下运动时,歪 Warm water boiler check valve role is to make the water in the pipeline can only flow in one direction, that is, can automatically stop the flow of water in the opposite direction. In March 1992, the new check valve on the garage was leaked during the low pressure drop, failing to meet the requirements and became the key to the vehicle inspection at the time. In response to this problem on-site investigation and analysis to determine the main reason that caused the check valve leakage is due to the stem and the three-jaw valve after the composition is not the heart, when the three-jaw valve up and down movement,