【摘要】 分析了一般弹簧直接作用式安全阀非正常泄漏的原因，提出了克服其非正常泄漏的方法。所研制的具有外置平衡机构的弹簧直接作用式安全阀克服了上述缺点，并可保持一般弹簧直接作用式安全阀的优点。更多还原

【Abstract】 The reason for abnormal leakage of general spring direct acting safety valve is analyzed and the method for overcome this abnormal leakage is proposed. The new design of such safety valve with outer balance mechanism is developed which can not only overcome the above defect but also keep the good performance of general spring direct acting safety valves.更多还原