Most success stories: American General, the United States, Foxconn, four Virgin Marui Auto Parts Co., Futaba auto parts, Auto Parts Co. Yuchao, Mastery Electric, Longhua mold, Jinfeng Group. Main components: Clamp Seal: NOK Japan Solenoid: Japanese relay: Japan and the spring pressure tubing: Japan Yuken sensing elements: Taiwan Ming Wei PLC: Taiwan Yonghong pneumatic pump: Taiwan HUAYHONG overload protection device is installed for use in punch on the slider for detecting internal hydraulic cylinder hydraulic pressure overload. When the overload situation occurs, the hydraulic pressure can quickly discharge within three thousandths of seconds. When overload occurs, the micro switch generates an electrical signal to inform the press emergency stop operation, in order to protect the punch and die. After the overload occurs, the air-driven hydraulic pump, rapid complement normal working pressure of the hydraulic cylinder, so that normal operation can immediately press. Internal overload protection device has a constant pressure control valve, can automatically adjust the hydraulic pressure, can eliminate punch in the stamping process, due to rising oil and sometimes did not produce the effects of pressure rise. Overload protection devices installed for use in punch for detecting slider cylinder internal hydraulic pressure overload, overload situation occurs when the hydraulic pressure can quickly be released within three thousandths of seconds. Competitive Advantages: high quality, fast delivery, diverse design, accept small orders.