Roots vacuum pump, also known as mechanical booster pump, is a volumetric dry vacuum pump and one of the main equipment to obtain medium and high vacuum. Two 8-shaped rotors are used to rotate synchronously and reversely in two semi-circular pump chambers to complete the process of air exhaust. This pump cannot be used alone, and it must be used in system with the backing vacuum pump, such as screw pump. The ultimate pressure of the roots pump depends on the structure and manufacturing precision of the pump, and also depends on the front stage pump. The data in the table is the lowest limit pressure when the screw vacuum pump is backing vacuum pump.

Design Features
1. High compression ratio: The rotor has a patented type line. It can have a large rotational speed within a wide pressure range (1~1x104Pa).

2. Clean and environment-friendly: the pump chamber is oil-free, and the side cover adopts patented seal to avoid oil vapor contamination of the vacuum system.

3. High reliability: patented shaft seal prevents the pumped medium from entering the bearing chamber, resulting in emulsifying failure of lubricating oil.

4. Low vibration: as a G1 level dynamic balance, the rotor has low vibration and noise.

5. No positioning pin combination: the o-ring seal is easy to maintain with low cost and high life.

6. High-standard configuration: imported bearing, grade 5 gear, German standard coupling.

7. It cannot be used alone, and the front-stage pump must be equipped.
Suggestion: the maximum pressure difference between inlet and outlet is 15~20Torr, depending on the specification.

ZJ、ZJP Roots Vacuum Pump Performance Specification

TYPE	Ultimate Pressure(Pa)	Capacity(L/s)	Maximum Differential Pressure(Pa)	Inlet/Outlet port(mm)	Motor Power(Kw)	Weight (Kg)	Backing Vacuum Pump
ZJ-150	8×10–1	150	10000	150/100	3	210	LG55/LGB30
ZJ-200	8×10–1	200	8000	100/80	3	210	LG55/LGB80
ZJ-300	8×10–1	300	8000	150/100	4	290	LG75/LGB110
ZJ-600	5×10–1	600	5000	200/150	7.5	560	LG150/LGB220
ZJ-1200	5×10–1	1200	5300	250/200	11/15	850	LG200/LGB300
ZJ-2500	8×10–2	2500	5000	320/250	22	1500	ZJ-600/LGB220
ZJ-5000	8×10–2	5000	3000	400/320	37	3450	ZJ1200/LGB300
ZJP-70	8×10–1	70	10000	80/50	1.1/1.5	100	LGB30
ZJP-150	8×10–1	150	8000	100/100	3	220	LG55/LGB80
ZJP-300	8×10–1	300	8000	150/150	4	310	LG75/LGB110
ZJP-600	5×10–1	600	5000	200/200	7.5	580	LG150/LG200
ZJP-1200	5×10–1	1200	5000	250/200	11/15	860	LGB220/LGB300
ZJP-2500	8×10–2	2500	3000	320/250	22	1500	ZJ-600/LGB220

P.S The ultimate pressure in the table is measured by Mcleod gauge.
ZJp is the roots vacuum pump equiped with overflow valve.

ZJ200 Roots Vacuum Pump

ZJ600 Roots Vacuum Pump

Features of roots pump

ZJ200 Roots Vacuum Pump

ZJ300 Roots Vacuum Pump

LG Screw Vacuum Pump

Add: 12 Jiangang Road, Toumengang Economic Development Zone, Linhai City
Contact: He Linwei 15988985688
Tel: 0576-85751995
Fax: 0576-85751996
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