Vacuum Ejectors generate a high vacuum at a relatively low volume flow rate. However, Air vacuum pumps differ from the vacuum pumps and blowers in that ejectors generate the vacuum pneumatically, using the so-called "Venturi" principle. In an vacuum generators, a stream of compressed air flows through a drive nozzle. The velocity of the air stream is far higher than in the supply line, resulting in a reduced pressure at the cone-shaped outlet.this draws the air out of the vacuum connection, generating the desired vacuum.

Type	A	B	C	D	E	F	G	H	I	V	K	P	M	N	Silencer
DV-05	45	33	16	10	8	14	20	4.5	2-D4.2	R1/8	10	R1/8	36	D16	R1/8
DV-10	45	33	16	10	8	14	20	4.5	2-D4.2	R1/8	10	R1/8	36	D16	R1/8
DV-15	63	35	20	11	10	20	25	5	2-D4.5	R1/4	15	R1/4	45.5	D20	R1/4
DV-20	85	40	30	15	13	28	32	7	2-D6	R3/8	20	R1/4	60.5	D30	R1/2