The product adopts the bistable operation mode of electronically controlled drive + air spring return, which is suitable for compressed air in accordance with ISO 8573-1:2010 (7:4:4) standard, and supports lubricated or unlubricated working conditions. The working pressure range is 1.5-8 bar, the pilot pressure is consistent with the working pressure, the standard rated flow rate is 650L/min, the reverse switching time is only 10ms, the action response is fast and the seal is reliable, and the exhaust function can be adjusted by throttling.