Roots Vacuum Pump Used for Vacuum Heat Treatment

    ModelSuction capacity         (L/S)Limit vacuum    (≤Pa)  Speed  (rpm)Motor Power      (kw)Inlet Dia.   (mm)Outlet Dia.    (mm)  Weight    (Kg)Recommended backing pump       model   ZJ-70         70     6x10-2  2780        1.5    80      50    87 2X-8  ZJB-70     5x10-2    100  ZJ-150A         150     6x10-2  2900         3    100     100    198    2X-15  ZJB-150     5x10-2    215  ZJ-300         300     6x10-2  1450         4    150     150    490     2X-30A  ZJB-300     5x10-2    480  ZJ-600         600     6x10-2  2900        5.5    150     150    490      2X-70A  ZJB-600     5x10-2    503  ZJ-1200A        1200     6x10-2  1450         11    300     300   1550      2X-70A           (2sets)  ZJB-1200     5x10-2    250     250   1580JZB Roots vacuum pump1. Construction features and working principle of the pump: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 themin the pump housing, rotating at the same speed in opposite directions to performfunction of suction and discharge of gas. The two rotors are supported by rolling bearingsin the end covers of the pump, rotating at high speed and are kept at afixed relative position by a pair of timing gears. The end clearance between rotors andend covers are fixed by adjustable metal shims between the bearing housings and theend cover at the fixed end, which ensures one-direction expansion of the rotor whentemperature rises during its operation.Four sets of inner seals (also known as piston ring) in the two end covers prevent lube oilentering into the pump housing. The shaft seal at the front-end cover, also called asframework oil seal or shaft seal, prevents leakage of air into the pump housing.In order to reduce temperature of the pump, all models of pumps (expect the twosmallest models) are equipped with a gearbox cooler and front-end cover cooler.Power is transmitted through a coupling or V-belt from the motor to the driving shaft ofthe pump and then through synchronizing gears to the driven shaftProduct's Application Product DisplayCompany Power FAQ1.Q:Are you a manufacturer or trading company?   A: We are a professional vacuum pump manufacturer with over 32 year experience. We have two factories now which cover more than 33333 square meters,we have rich experience in solid liquid industry , Welcome to visit our factory at your time.2.Q:Do you have minimum order quantity request?   A: for spare parts we have no MOQ,but for whole set equipment of course 1 set is the minimum.3.Q:Do you have certificates?    A: Yes, we have CE, ISO,SGS.etc. certificates.5.Q:How to pay?      A:T/T and Alibaba Payment is acceptable.6.Q:How to pack the products?   A: We use standard export package. If you have special package requirements, we will pack as you required, but the fees will be paid by customers.7.Q: What about your delivery time?   A: It depends on your pump quantity. Generally 15 days after we receive the prepayment. We will confirm you again when we start to produce.8.Q:How to install after the equipment arriving destination?   A: We will sent the operating instruction with goods to you.Please strictly follow the instructions for installation9.Q: How long does your product quality warranty last?   A: 12 months for all our products against any non-artificial quality problem since the product leave our factory.10.Q: What will you do with quality complaint?     A: We have a complete set of microcomputer controlled testing system(All products are subject to tested before delivery. No product that failed performance test leaves our factory. /* March 10, 2023 17:59:20 */!function(){function s(e,r){var a,o={};try{e&&e.split(",").forEach(function(e,t){e&&(a=e.match(/(.*?):(.*)$/))&&1