ZJ-Type Tri-Lobe Roots Vacuum Pump

Overview

Roots vacuum pump has a pair of tri-lobe rotors driven by a pair of high precision synchro-gears. The left figure illustrates one cycle of suction and discharge during 120 degrees. The tri-lobe rotors of involute profile rotate without contact and keep a constant gap in-between. It can be used with many fore pumps with air or water cooling mode and different sealing types in order to meet the various processing requirements and working conditions.

Due to this patented design, our Roots vacuum pump have obvious advantages over the traditional roots pumps of two-lobe rotors in the key performance indicators such as the pumping efficiency, maximum differential pressure, temperature rise, vibration and noise. High precision gears and rolling bearings ensure low noise and smooth operation of rotors, and it has relatively large pumping rate at low suction pressure.

Main charateristics

High rotation speed and volumetric efficiency, less temperature rise and vibration.

Simple structure results in the higher reliablity and ease of use.

O-ring static and plannar seals ensure the multiple assembly and disassembly.

Mechanical sealing, lip seal, frame seal, piston ring seal and labyrinth seal can be selected for face sealing.

Application

Tri-lobe roots pumps can be only used with other fore pumps. Equiped with different fore pumps, they have various performance. Roots vacuum pumps mainly are used in the situation of large pumping speed and rough/medium vacuum (103~10-2Pa). Typical applications are the vacuum film coating, vacuum welding furnace, vacuum heat treatment furnace, and large space simulation test, and microelectronics and integrated circuit and bulb production, vacuum packaging, and concentrated gas pumping system, and various chemical processing, and vacuum steam discharge, and vacuum dehydration, and vacuum frozen drying, and vacuum distillation.

Specifications

MODELPUMPING RATE(L/S)ULTIMATE PRESSUER(Pa)MAX.Pre.Diff(Pa)POWER(KW)MOTOR SPEED(rpm)SUCTION(mm)DISCHARGE(MM)WEIGHT(kg)Recom.FORE PUMPZJ-7070≤0.05≥1.2*1041.529008050582x-15ZJ-150150≤0.05≥1.2*10432900100801362x-30ZJ-300300≤0.05≥1*104429001501002312x-70ZJ-600600≤0.05≥8*1035.5(7.5)2900200150485ZJ-150 2X-30ZJ-12001200≤0.05≥6*103112900250200860ZJ-300 2X-70ZJ-25002500≤0.05≥5*10318.529003502501550ZJ-600 H-150ZJ-50005000≤0.05≥4*1033714504003503200ZJ-1200 H-150ZJ-1000010000≤0.05≥3*1035514505004005800ZJ-1200 H-150ZJ-2000020000≤0.05≥3*103110145060050012000ZJ-1200 H-150

Note:The performance specification in the above table are measured under the given condition with the recommended fore pump.When equipped with different fore pumps,they have various performance.Pumping rate is measured in the given condition with the pump inlet pressure of about 67 pa to 2.67 pa.Ultimate pressure means the measured stable sub-pressure of air in the closed pump inlet without any container by a compression type vacuum meter.

Performance curve

Dimensions

MODELLL1L2L3HH1H2H3AA1A2DD1D2N-Mdd1d2n-ФZJ-707291901001512302120220Ф80Ф125Ф1458-M8Ф50Ф90Ф1104-Ф8ZJ-150938273132184347330116.530392358300Ф100Ф145Ф1658-M8Ф80Ф125Ф1458-Ф8ZJ-300105632818525541940013540463428360Ф150Ф200Ф258-M10Ф100Ф145Ф1658-Ф8ZJ-600128240522030452850517545587548460Ф200Ф260Ф28512-M10Ф150Ф200Ф2258-Ф10ZJ-12001573473300392649625218.558722648560Ф250Ф310Ф33512-M10Ф200Ф260Ф28512-Ф10ZJ-2500189059444055275072022055858810700Ф320Ф395Ф42512-M12Ф250Ф310Ф33512-Ф10ZJ-5000263086582096095092555720Ф400Ф495Ф54016-Ф22Ф350Ф445Ф49016-Ф22ZJ-100002980987107012351160112043545141613301000Ф500Ф600Ф64520-Ф22Ф400Ф495Ф54016-Ф22ZJ-20000457519151400190018001600550100206020001550Ф600Ф720Ф75024-M28Ф500Ф600Ф65016-Ф28