Basic Info
Model NO.: ZJB
Structure: Rotary Vacuum Pump
Vacuum Degree: High Vacuum
Working Conditions: Dry
Product Name: High Quality Roots Vacuum Pump From China
Application: Main Pump
Theory: Vacuum Pump
Power: Electric
Attention: Usually Installed with Liquid Ring Vacuum Pump or
Transport Package: Polywooden Cases
Origin: Anhui
Oil or Not: Oil
Exhauster Method: Positive Displacement Pump
Work Function: Mainsuction Pump
Certificate: Ce,ISO9001,TUV,SGS
Color: Blue
Place of Origin: Anhui,China
Usage: Air Pump
Pressure: High Pressure
Trademark: YHZKB
Specification: CE, SGS, TUV, ISO9001
HS Code: 84141000
Product Description
| Model ZJ Mechanical Booster Pump, also known as a Roots pump, is a volumetric pump. It employs a pair of rotors, identical and in 8-figure with certain clearance between them in the pump housing, rotating at the same speed in opposite directions to perform function of suction and discharge of gas. The two rotors are supported by rolling bearings in the end covers of the pump, rotating at high speed and are kept at a fixed relative position by a pair of timing gears. The end clearance between rotors and end covers are fixed by adjustable metal shims between the bearing housings and the end cover at the fixed end, which ensures one-direction expansion of the rotor when temperature rises during its operation. |
The main advantage of Roots vacuum pump is that it can operate with high pumping
speed under lower suction pressures, however, has to be backed by a backing pump.
(See Fig.3) Under normal working conditions, it is permissible to not add by-pass pipes.
Roots vacuum pump should not operate with a higher-pressure difference than allowable,
otherwise overheating and overload will cause damage of Roots vacuum pump.
Therefore, proper backing pump and necessary protection devices must be considered.
| Model | ZJB-30 | ZJB-70 | ZJB-150 | ZJB-300 | ZJB-600 | ZJB-1200 |
| Extract Capacity (L/S) | 30 | 70 | 150 | 300 | 600 | 1200 |
| Ultimate Vacuum(Pa) | ≤3*10-2 | |||||
| RPM(r/min) | 2770 | 2870 | 2900 | 1450 | 2900 | 1450 |
| Motor(Kw) | 0.75 | 1.5 | 3 | 4 | 5.5 | 11 |
| Noise dB(A) | ≤78 | ≤78 | ≤82 | ≤83 | ≤86 | ≤90 |
| Inlet diameter (mm) | 50 | 80 | 100 | 150 | 150 | 300 |
| Outlet diameter (mm) | 40 | 50 | 100 | 150 | 150 | 300 |
| Weight (Kg) | 75 | 100 | 215 | 480 | 503 | 1580 |
NOTES:
1. Ultimate pressure (Pa) value is measured by mercury McLeod vacuum gauge.
2. Pumping speed refers to maximum pumping speed measured when Roots vacuum
pump is connected with a recommended backing pump with an inlet pressure ranging
from 67Pa to 2. 7Pa.
3. Ultimate pressure refers to lowest value of stable partial pressure measured at inlet
port of a Roots pump without any additional vessels after sufficient suction with inlet
of it tightly closed by a blank flange when connected with a recommended backing
pump.
4. Each performance above the list is obtained under recommended backing pump.
Customers can select backing pump suitable for the intended application, but its main
performance index may have some changes.
Main products: