... PumpPneumatic Membrane Pump is easy to operate, reliable, portable with low noise, highly efficient and much durable. It is ... Idle seal, no leakage position;d. Wearable material, innocuity, with power applicability to other material, no rustily and empoison danger ... industry, such as food, medicine.e. Diverter valve with special structure, flexible running, no dead center, low air consumption;f. ...