Vacuum pump LEM 325/425

One stage vacuum pump Close coupled, OEM construction.

Capacity	100 m³/h to 470 m³/h
Pressure range	33 mbar to 1013 mbar
Material	Cast iron & Stainless steel

Variations
Product information

Variations

Article number	Amount
AT 6300-325
AT 6300-425

Product information

Main facts

Capacity	Pressure range	Material
100-470 m³/h	33-1013 mbar	Cast iron & Stainless steel

Description

A one stage liquid ring vacuum pump in OEM design.

Close coupled pump where the motor is mounted directly on the pump casing to take up as little space as possible when mounted on the system

Range of application

Evacuation and pumping of dry gases and saturated steam.

Typical industries are chemistry, pharmaceutical, food, plastic and rubber industry.

Vacuum is used for distillation, drying, degassing, filling and boiling.

Design

The pump works according to the liquid ring principle. Fluid pumps are in some regards related with displacement pumps since the pump wheel is eccentrically located in the round pump body. When the wheel is rotating a fluid ring is created along the pump body's inner wall. In the cells (the space between the pump body's wings) inside the fluid ring rising part volumes (intake) and then decreasing volumes (outlet) will be created under one rotation.

Material combinations

Pos	0B	4B
Vacuum casing	0.6025 Cast iron	1.4408 Acid-proof steel
Pump casing	0.6025 Cast iron	1.4408 Acid-proof steel
Guide disc	0.6025 Cast iron	1.4408 Acid-proof steel
Valve ball	Polyamide A	PTFE
Impeller	0.7043 Nodular iron	1.4517 Acid-proof steel