... 570Features: 1 positive displacement blower, no compression, air conveying is smooth, there is small flow rate ... and cement industries etc.Accessory: suction silence (with air filter). Discharge silence, safety valve, pressure gauge, ... cock, vibration-isolating base, rubber vibration isolator, expansion joint, check valve, gate valvePayment terms: 30% T/T ... within two weeks 3 lobe Roots type air Blower