配有过载保护装置，压力过载时，红灯或黄灯闪亮，并自动停机。
When have the over-load protection, the pressure overload, the red light or the yellow light glisten, and auto-stop.
特点：数字等压力控制器调压，设有过压，欠压保护装置，行程开关控制上下位置。
Features: figures etc. pressure control device adjusts pressure, with over pressure and under pressure protection devices, travel switch controls up and down positions.
配有过载保护装置，当压力过载时，能自动停机。
Overload protective device is mounted so that when the pressure is overloaded, the machine will automatically stop.
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