... .chamber, fluctuation,adjustable 3.used for producing PPR, PE, PVC pipe 4.CE and ISO9001 certificate Applications and structure :With plastic extruder, calibration ... vacuum in the tank, vacuum meter reflect the vacuum degree, and exhausting valve adjust the vacuum degree according to the demand ... ±25Water pump power(KW)7.5KWVacuum degree(MAX=pa)4000 high efficiency vacuum machine for plastic pipes