Make sure the pressure in the tank of the sand separator was released to zero, then open the top cap on the upper end of the tank to replace the filter screen.
在更换滤网时，要按正确的操作步骤进行泄压，确定除砂罐内的压力泄尽后，才能打开除砂罐上端的顶盖，进行更换。
The pressure relief valve can be washed easily by rotating and separating the filter screen first.
当需要清洗的时候就可先方便地将过滤网旋转下来后再清洗泄压阀。
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