目前大量生产的安全阀有弹簧式和杆式两大类。
At present, there are a large number of production safety valve spring and leveraged two broad categories.
拆卸安全阀阀盖，阀杆/隔膜总成，和安全阀弹簧。
Remove the relief valve cover, stem/diaphragm assembly, and relief valve spring.
在锅炉未点火启炉之前，采用液压马达助力装置主动提拉安全阀阀杆，使安全阀开启。
Before boiler working, pull the haulm of safe valve by hydraulic motor set until the safe valve spring.
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