ZJ-20000 Roots Vacuum Pumps



Series ZJ-20000 Roots Vacuum Pumps


ZJ-20000 Roots Vacuum Pumps 1 ZJ-20000 Roots Vacuum Pumps 2


Inlet/Outlet Dia(mm)
Max.Permiss able Diff.Pressure
Motor Power(kw)
Recom-ended Backing Pump

ZJ type pressure comfort valve Roots vacuum pump runs on the couple of 8-shaped rotors to help make the same quickness invert rotation in the pump casing to create suction and exhaust. Each rotor is certainly backed by two bearings. The relative positions of both rotors are always held regular by a set of synchronous gears. There exists a gap between your rotor and the rotor, the rotor and the pump body, and the rotor and the medial side cover. No friction, no lubrication necessary. The support of the pump rotor adopts a trusted anti-backlash framework, the rotating parts are properly well balanced, and the high-precision helical equipment is adopted. For that reason, the movement is steady, the sound is low, the utilization is more dependable, and the long-term surgical procedure can be carried out under the ruthless difference. The powerful sealing component adopts the patented technology of the business and adopts the imported essential oil seal to regulate the runout of the shaft seal to end up being ≤ 0. 02mm, therefore the shaft seal will not leak essential oil. The self-weight valve is certainly installed between your intake and exhaust ports of the pump, and its function is usually that the valve instantly opens when the pressure difference between the exhaust slot and the intake slot exceeds the valve’s personal weight. This pressure difference is the maximum pressure difference at which the pump can operate reliably. Consequently, the Roots pump with alleviation valve has an programmed overload prevention function.
Use characteristics:
The ZJ Roots vacuum pump has a huge pumping rate at a lower inlet pressure and is equipped with an programmed anti-overload function. However , since the structure of the pump is usually a dry gap seal, in order to obtain a specific pumping rate and vacuum, and reduce the backflow, the pressure of the front stage must be reduced. Therefore , the front stage vacuum pump must be hooked up in series with the front stage vacuum pump. After pumping a specific degree of vacuum, restart the Roots vacuum pump, which is usually more economical. According to actual needs, different vacuum pumps works extremely well as the foreline pump, such as oil seal pump and liquid ring pump. It is worth mentioning that when a liquid ring pump can be used as the foreline pump, it is especially suited to occasions where a huge amount of condensable gas needs to be removed.

ZJ-20000 Roots Vacuum Pumps 3