Product Center

PRODUCT CATEGORY

Your location: Home page

LG series screw pump

The dry screw vacuum pump is a pumping device for suction and exhaust generated by a pile of mutually meshing screws and synchronous high-speed reverse rotation in the pump casing. The two screws are processed by fine dynamic balance and supported by bearings. Installed in the pump casing, there is a certain gap between the screw and the screw, so when the pump is working, there is no friction between each other, the operation is stable, the noise is low, and the working chamber does not need working medium. Therefore, the screw vacuum pump can pump out gas containing a large amount of condensable gas and dust, and it is an environment-friendly and energy-saving vacuum pump. It is an updated product of oil-sealed mechanical vacuum pump, liquid ring vacuum pump and reciprocating vacuum pump.

Classification:

Product Center

Vacuum Products

Screw Vacuum Pump

Key words:

Product Consulting:

020-39987161

Product inquiry

Product description

Commodity name: LG series screw pump

Dry screw vacuum pump

详细信息：

Product Brand: Xingguang Vacuum	Product model: LG30-300	Body material: alloy
Drive mode: electric	Process use: vacuum	Working principle: dry screw
Motor Power：4-37 kW	Ultimate pressure：5 Pa	Dimensions：

Product number：

LG30/70/110/150/220/300

LGB50/70/135/180/220/300/360/400

LGB70S/110S/150S/220S/300S

Do you want to learn more? Please contact us directly (Guangzhou Lidun Machinery Equipment Co., Ltd.)

020-39987161 & lidunjixie@163.com

working principle：

As shown in Figure 1 and Figure 2, a pair of parallel spiral rotors 1 and 2 are installed in the screw vacuum pump. The spiral direction 1 is right-handed and 2 is left-handed. The two rotors are kept synchronized and reversed in the pump body through a stack of gears 3. Spin. There is no friction between the rotor and the rotor, and between the rotor and the pump body and a certain gap is maintained. A plurality of sealed cavities 4 are formed between the two rotors and the pump body 9, and the number of the sealed cavities is equal to the number of spiral turns of the rotor.
When the two rotors rotate in the direction shown in the figure, the space in the sealed chamber connected to the suction port 5 gradually increases, and the gas is sucked in and pushed to the exhaust side. The space in the sealed chamber 6 on the exhaust side gradually increases during the rotation. It becomes smaller and the gas is compressed to the exhaust port 7. These sealed cavities regularly "move" from the inlet side of the pump to the outlet side, so that the gas is transported out in a swirling flow. The continuous movement of the pump does not change the gas flow direction, so that the particles entrained by the gas can be pumped out as vapor within a certain range.
When running for a long time, it is necessary to pass an appropriate amount of coolant into the jacket 8 of the pump body and the side cover to cool the pump, so as to achieve temperature balance.
Since the heat of compression is mainly generated on the exhaust side 6, in order to fully cool the rotor, an appropriate amount of air or other suitable gas can be introduced into the pump cavity through the air aeration port 10 under most working conditions.

Features：

* There is no oil in the pump cavity, no pollution to the vacuum system, and product quality is improved;
* There is no oil in the pump cavity, which solves the problems of oil emulsification and frequent replacement of working fluid, frequent maintenance and maintenance, and saves costs;
*Dry operation will not produce oil and oil fume, which is good for environmental protection and save oil resources. It can extract gas containing a lot of water vapor and dust. After adding accessories, flammable, explosive and radioactive gases can also be removed;
*The ultimate vacuum is relatively high, suitable for medium and low vacuum. It can be connected in series with the Roots pump to form an oil-free medium vacuum pumping unit, and in series with a molecular pump, it can form an oil-free high vacuum unit;
*After adopting anti-corrosion coating treatment, it is especially suitable for product distillation, drying and degassing in pharmaceutical and chemical processes.

typical application：

Industrial furnace: vacuum brazing, vacuum sintering, vacuum annealing, vacuum pressure gas quenching, vacuum dehydrogenation, etc.
Vacuum coating: vacuum evaporation coating, vacuum magnetic control sputtering coating, film winding continuous coating, ion plating, etc.
Metallurgy: special steel smelting, vacuum induction furnace, vacuum desulfurization, degassing
Electrician: transformer, transformer, epoxy resin vacuum casting, capacitor vacuum oil immersion, vacuum pressure immersion
Drying: variable pressure vacuum drying, coal-gas tank drying, wood drying, vegetable freeze drying Chemical, pharmaceutical: product distillation, drying, degassing, material transportation, etc.
Note: For corrosive conditions, please contact our company.

Dry screw vacuum pump selection and ordering information：50Hz，3AC，IP54/55，F

model	Limited Data m³/h	Ultimate vacuum Pa	power kW	Rotating speed r/min	noise dB(A)	weight kg
LG 30	110/130	5/1	4	2880/3450	76	300
LG 70	250/300	5/1	11	2930/3500	76	570
LG 110	400/480	5/1	15	2930/3500	78	760
LG 150	540/650	5/1	18.5	2930/3500	78	840
LG 220	790/950	5/1	30	2950/3500	80	1250
LG 300	1080/1300	5/1	37	2950/3500	80	1390
LGB 50	180	5	4	2880	76	310
LGB 70	250	5	7.5	2900	76	475
LGB 135	486	5	11	2900	78	570
LGB 180	650	5	15	2940	78	840
LGB 220	790	5	22	2950	80	1220
LGB 300	1080	5	22	2950	85	1250
LGB 360	1300	5	30	2950	85	1400
LGB 400	1440	5	30	2950	85	1410

Detailed information such as product performance curve:

Please call, fax, email or contact our sales engineer via QQ, we will serve you wholeheartedly.

TEL: 020-39987161 E-Mail: lidunjixie@163.com QQ:121450481

NASH water ring vacuum pump

Centrifuge refrigeration unit