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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.
Four sets of inner seals (also known as piston ring) in the two end covers prevent lube oil entering into the pump housing. The shaft seal at the front-end cover, also called as framework 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 two smallest 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 of the pump and then through synchronizing gears to the driven shaft
|Model||Suction capacity (L/S)||
|Recommended backing pump(model)|
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.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.Oil sealed mechanical pump is usually selected as the fore vacuum pump. Other types of backing pumps may be used where their requirement for ultimate vacuum is not too strict. Particularly, when gas pumped containing large amount of vapor, water-ring vacuum pump maybe an ideal option though ultimate vacuum achieved is on the low side.
Standard export polywooden cases.
EPT packaging can be available.
|Express||Door to door, very convenient, don’t need customs clearance or pick-up.|
|By air||Airport to airport, you need to do the customs clearance and pick up the goods at your local airport.|
|By sea||Port to port and you need to do the customs clearance and pick-up the goods at your local port.|
Provide 24-hour reply.
Provide suitable models according to clients’ requirements.
Provide detailed product specifications and reasonal prices.
Supervise whole production time.
Provide product’s testing performance curve to customers.
Provide inspection pictures to customers after we finish production.
Provide installation manual.
Under correct installation, normal maintenance and using,we guarantee one-year warranty.
If product has malfunction,we’ll reply you within 24 hour and provide solution or even send technical staff to spot after receiving maintenance notification.
1. Q: Are you a manufacturer or trading company?
A: We are manufacturer of vacuum pumps and water pumps in China since 1986.
2. Q: What’s your MOQ?
A: One set is ok.
3. Q: What’s your payments terms?
A: T/T, Western Union……
4. Q: What certificates do you have?
A: CE, ISO 9001 ….
5. Q: How about the warranty?
A: 12 months warranty since delivery.
6. Q: What’s the delivery time?
A: For different models,different motor specs and different material,delivery time is different,please double confirm with our sales team.
7. Q: Can you do OEM brand?
A: Yes, welcome.
8. Q: Quality reliable?
A: We have whole testing system controlled by micro-machine,testing performance curve can be sent to clients before arrange delivery.
Established in 1986, our company has been focusing on the development and manufacture of vacuum pumps and water pumps.We are a comprehensive pump company integrating production, sales and after-sales maintenance services.
The main products include liquid ring vacuum pumps;rotary vane vacuum pumps;roots vacuum pump;centrifugal water pump and EPT vacuum pump system,which are widely used in all kinds of plastic extrusion line;medical and pharmaceutical industry(autoclave sterilizer/capsule filling and sealing machine);food-related industry(beverage machine/milking machine/sugar plant);chemical industry;power plant;coal mine etc.
The use of original equipment manufacturer’s (OEM) part numbers or trademarks , e.g. CASE® and John Deere® are for reference purposes only and for indicating product use and compatibility. Our company and the listed EPT parts contained herein are not sponsored, approved, or manufactured by the OEM.