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从84年下半年起,我厂造气车间对煤气发生炉系统中的重要安全设备Dg750水压安全阀进行了改造。改造的重点是易出现故障和泄漏最严重的水压缸部分(见图1)。这些故障和泄漏是:
From the second half of 1984, our factory made a retrofit on the Dg750 water pressure safety valve, an important safety equipment in the gas furnace system. The focus of the retrofit is on the part of the cylinder that is prone to malfunction and leaks (see Figure 1). These faults and leaks are: