Integrated dry vacuum pump

Varying Pitch Screw Vacuum Pump DSVP Series

DSVP Series Varying Pitch Screw vacuum pump is composed of a pair of meshing variable pitch screw rotors which rotate in the opposite direction and synchronous way at high speed in the pump cavity to complete the intake and exhaust cycle. Varying Pitch Screw vacuum pump compresses the medium more efficiently with energy saving and lower temperature than constant pitch screw vacuum pump. Without any lubricants in the housing, it is perfect for medium recycling and environmental protection, which is the best upgrading products for oil-sealed, steam-jet and liquid ring pumps. The variable pitch screw rotor can be customized and manufactured in order to best fit for clients' requirements

Features Specifications Application

1、Screw rotors with high-precision dynamic balance--- smooth operation, lower noise, smaller vibration and longer service life.
2、No contact and friction between screw rotors--- no oil in the pump cavity and zero-discharge of sewage.
3、High strength and stable performance screw rotor made of nodular cast iron.
4、Easy cleaning with nitrogen purging --- simple operation and convenient maintenance.
5、Wide pumping rate range and high ultimate vacuum of 5Pa.
6、Higher pumping efficiency and less energy consumption.

Specification	Unit	DSVP-35	DSVP-70	DSVP-110	DSVP-180	DSVP-280	DSVP-390	DSVP-550	DSVP-650	DSVP-800	DSVP-1100	DSVP-1500	DSVP-2000	DSVP-2800
Nominal displacement capacity	M³/ h	35	70	110	180	280	390	550	650	800	1100	1500	2000	2800
Nominal displacement capacity	L/S	10	19	31	50	78	92	153	167	220	306	417	556	778
Ultimate pressure	Torr	0.04	0.04	0.04	0.04	0.04	0.04	0.04	0.04	0.04	0.04	0.04	0.04	0.04
Ultimate pressure	Pa	5	5	5	5	5	5	5	5	5	5	5	5	5
Power	Kw	1.5	3	4	5.5	7.5	11	15	18.5	22	30	45	55	75
Rotational speed	RPM	2900	2900	2900	2900	2900	2900	2900	2900	2900	2900	2900	2900	2900
Inlet & Outlet Port	DN mm	40/25	40/30	40/30	40/30	80/40	80/40	100/50	100/65	100/65	125/80	125/80	150/100	150/100
Cooling water	L/min	4	4	6	6	6	6	8	8	8	8	16	16	16
Weight	kg	200	220	250	290	320	450	580	650	1050	1200	1800	2100	2500
Noise	db	≤70	≤70	≤70	≤70	≤75	≤75	≤75	≤80	≤80	≤80	≤85	≤85	≤85

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