Characteristics of hydraulic screen changer for patch drip irrigation belt Surface mounted drip irrigation belt hydraulic screen changer can quickly switch the filter screen within 1 second. The screen changing action is fast, the material flow changes are small, there is no leakage, the pressure resistance is high (peak can reach 50MPA), the filtering area is large, the flow channel is short, the operation is simple, the waste material during screen changing is small, and the screen changing is