Zjt-70 70L/S Zj-70 1.5kw Tri-Lobe Roots Vacuum Pump

• After-sales Service: Online Video Instruction
• Warranty: 1 Year
• Oil or Not: Oil Free
• Structure: Rotary Vacuum Pump
• Nominal Pumping Speed(50Hz): 70 L/S
• Ultimate Pressure: 0.5 PA
• Model NO.: ZJT-70
• Max. Allowable Pressure Differernce: 12kpa
• Nominal Motor Rating(50Hz): 1.5 Kw
• Nominal Motor Speed(50Hz): 1450 Rpm
• Cooling Water Requirement: Optional
• Suction Connection Size: 100 mm
• Discharge Connection Size: 80 mm
• Weight (Without Motor) Approx.: 165kg
• Recommended Backing Pump: Dvp180
• Rotor Type: Three Vane
• Transport Package: Wooden Box or Per Customer Requirements
• Trademark: Hengxi
• Origin: China
• HS Code: 8414100090
• Production Capacity: 1000pieces/Year

Product Description

 

Working principle

Roots vacuum pump is a kind of rotary positive-displacement type of pump. The two three-lobe rotors keep a certain gap with the housing, and the two rotors mesh with each other and keep a certain gap when they rotate in the housing through a pair of synchronous reverse rotation high-precision gears. The diagram on the right shows the structure principle of the pump, from diagram I to IV, the rotor rotates in the house and completes one suction and discharge process.
The Roots vacuum pump with three-lobe rotors has technical advantages over the traditional two-lobe rotors in terms of pumping efficiency, maximum allowable differential pressure, temperature, vibration, noise and other major performances.

 

Main features

Compared with the traditional two-lobe Roots vacuum pump, there are below advantages:
1. Much higher efficiency, lower temperature, vibration and noise.
2. More stable and reliable, more convenient to use and maintain.
Other features:
1. Lower failure due to the rotors are fixed and no axial run-out.
2. High-precision transmission gear and precision rolling bearing are used, resulting in low noise and smooth operation.
3. The main shaft use special mechanical seal to ensure oil-free pump chamber.
7. Mechanical seal, oil seal, piston ring labyrinth seal and other types of seal can be used for end cover.
8. It is used in pump combinations together with rotary vane vacuum pump, reciprocating pump, liquid ring pump, dry screw pump and other types of backing pumps to meet various process requirements.

Applications

The advantage of Roots vacuum pump is that it has large pumping efficiency even at low inlet pressure, but ordinary Roots vacuum pump can't be used alone, it must be used in pump combinations together with the backing pumps. The Roots vacuum pump can be started only after the pressure in the system is pumped to the allowable starting pressure of the Roots vacuum pump by the backing pump.
According to different working pressure and process conditions, the backing pump of Roots vacuum pump can be rotary vane vacuum pump, liquid ring vacuum pump, dry screw vacuum pump and so on. The performance of Roots vacuum pumps are different when combination with different backing pumps.
Roots vacuum pumps are mainly used in any vacuum system requiring large pumping speed and rough and medium vacuum (103-10-2Pa), such as: vacuum coating, vacuum welding furnace, vacuum heat treatment furnace, large space simulation test, microelectronics and integrated circuits, lamp and bulb manufacturing, laser manufacturing, vacuum packaging, centralized pumping system, various chemical processing, vacuum degassing vacuum deaeration, vacuum dehydration, vacuum freeze drying, vacuum distillation.

Product Parameters

Model	Nominal pumping speed(50Hz)	Ultimate pressure	Maximum allowable pressure difference	Nominal motor rating (50Hz)	Nominal motor speed  (50Hz)	Suction Connection size	Discharge Connection size	Weight	Backing pump recommended
	L/s	Pa	Pa	Kw	rpm	mm	mm	Kg
ZJT-70	70	≤0.5	≥1.2*10^4	1.5	1450	100	80	165	DVP180 or DSP140
ZJT-150	150	≤0.5	≥1*10^4	3	2900	100	80	165	DVP360 or DSP280
ZJT-300	300	≤0.5	≥8*10^3	4	2900	160	100	275	DVP540 or DSP540
ZJT-600	600	≤0.5	≥6*10^3	5.5	2900	200	160	420	DVP540 or DSP540
ZJT-1200	1200	≤0.05	≥5*10^3	11	2900	250	200	980	ZJTQ-300+DVP540
ZJT-2500	2500	≤0.05	≥4*10^3	18.5	2900	320	250	1800	ZJTQ-600+DVP540
ZJT-5000	5000	≤0.05	≥3*10^3	37	1450	300	300	3580	ZJTQ-1200+DVP800

Note:
1. The pumping speed refers to the maximum pumping speed measured at the inlet pressure of the Roots vacuum pump in the range of 67 pa to 2.67 pa under the conditions of the recommended backing pump. (see p Pumping speed diagram)
2. The ultimate pressure is the lowest value of the stable air partial pressure measured at the pump inlet with a compression vacuum gauge after full pumping without any additional container and no air inlet under the condition of the recommended backing pump.
3. The data of the above table is obtained under the condition of using the recommended backing pump, users can choose different backing vacuum pumps according to different situations, but the main performance index will be changed.
 

Pressure diagram

 

 

Dimension

 

Model	L	L1	L2	L3	H	H1	H2	H3	A	A1	A2	D	D1	D2	N-M	d	d1	d2	n-m
ZJT-70	730	191	330	360	270	252		40	256		214	Ф80	Ф125	Ф145	8-M8	Ф50	Ф90	Ф110	4-M8
ZJT-150	938 .	273	132	184	350	330	116.5	30	392	358	300	Ф100	Ф145	Ф165	8-M8	Ф80	Ф125	Ф145	8-M8
ZJT-300	1032	323	185	259	405	385	135	40	455	420	350	Ф150	Ф200	Ф225	8-M10	Ф100	Ф145	Ф165	8-M8
ZJT-600	1282	405	220	304	520	495	165	35	587	548	450	Ф200	Ф260	Ф285	12-M10	Ф150	Ф200	Ф225	8-M10
ZJT-1200	1573	473	296	392	650	625	218.5	58	722	678	560	Ф250	Ф310	Ф335	12-M10	Ф200	Ф260	Ф285	12-M10
ZJT-2500	1890	594	440	552	730	700	220	55	858	810	660	Ф320	Ф395	Ф425	12-M12	Ф250	Ф310	Ф335	12-M10

FAQ

Q: What information should I offer for an inquiry?
A: You can inquire based on the model directly, but it is always recommended that you contact us so that we can help you to check if the pump is the most appropriate for your application.

Q: Can you make a customized vacuum pump?
A: Yes, we can do some special designs to meet customer applications. Such as customized sealing systems, speical surface treatment can be applied for roots vacuum pump and screw vacuum pump. Please contact us if you have special requirements. 

Q: I have problems with our vacuum pumps or vacuum systems, can you offer some help?
A: We have application and design engineers with more than 30 years of experience in vacuum applications in different industries and help a lot of customers resolve their problems, such as leakage issues, energy-saving solutions, more environment-friendly vacuum systems, etc. Please contact us and we'll be very happy if we can offer any help to your vacuum system.

Q: Can you design and make customized vacuum systems?
A: Yes, we are good for this.

Q: What is your MOQ?
A: 1 piece or 1 set.

Q: How about your delivery time?
A: 5-10 working days for the standard vacuum pump if the quantity is below 20 pieces, 20-30 working days for the conventional vacuum system with less than 5 sets. For more quantity or special requirements, please contact us to check the lead time.

Q: What are your payment terms?
A: By T/T, 50% advance payment/deposit and 50% paid before shipment.

Q: How about the warranty?
A: We offer 1-year warranty (except for the wearing parts).

Q: How about the service?
A: We offer remote video technical support. We can send the service engineer to the site for some special requirements.