Oil-Free Dry Screw Vacuum Pump

Dry screw vacuum pump is a pair of screw rotors engaged in the pump shell in the opposite and synchronous way, forming the operation of suction and discharge. Through maintenance free technology, our screw vacuum pump has fewer problems in difficulty and sealing than the liquid in the pump shell. Screw vacuum pump can be used to recover many condensable gases. This function can solve many pollution and ecological problems of vacuum system, such as steam jet pump, slide valve pump, rotary vane pump and liquid ring pump, and recycled materials can bring more economic benefits to customers.

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Oil-Free Dry Screw Vacuum Pump Main Characteristics:

1. Single stage design, wide range of pumping rate, can be directly discharged to atmospheric pressure, with the maximum vacuum degree of 5 PA.

2. N2 purging is easy to clean and maintain.

3. The nodular cast iron screw rotor has high strength and good stability.

4. There is no contact, friction, lubricant, waste and low energy consumption between screw rotors.

5. It is suitable for wet surface of anticorrosive coating in chemical and pharmaceutical industries.

6. The screw rotor has precise dynamic balance, stable operation, low noise, small vibration and long service life.

Description	UNIT	DP35	DP70	DP150	DP280	DP390	DP550	DP650	DP800	DP1100
Displacement	m3/Hr	35	70	150	280	330	550	600	800	1100
Displacement	L/S	10	19	42	78	92	153	167	222	306
Ultimate pressure	Torr	0.03	0.03	0.03	0.03	0.03	0.03	0.03	0.04	0.04
Ultimate pressure	Pa	4	4	4	4	4	4	4	5	5
Motor power	KW	2.2	4	5.5	7.5	11	15	22	30	37
Rotating speed	RPM	2900	2900	2900	2900	2900	2900	2900	2900	2900
Suction flange	mm	DN40	DN40	DN40	DN80	DN80	DN100	DN100	DN100	DN125
Discharge flange	mm	DN25	DN30	DN30	DN40	DN40	DN50	DN65	DN65	DN80
Cooling water Max.Press	barg	2~4	2~4	2~4	2~4	2~4	2~4	2~4	2~4	2~4
Cooling water flow rate	L/min	4	4	6	6	6	8	8	8	8
Cooling water tem	ºC	5~35	5~35	5~35	5~35	5~35	5~35	5~35	5~35	5~35
Noise level	dB	≤70	≤70	≤75	≤75	≤75	≤80	≤80	≤85	≤85
Dimension	mm	745450 550	953520 600	973600 680	1123640 680	1357640 680	1516780 800	1609780 800	1786840 930	2250880 1100
Weight	Kg	160	195	230	253	450	523	650	1050	1500

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