AWC 390 Motor 3Ph 380 V 50 Hz, entirely in stainless steel SS 304

Atlas Copco AWC 390 – liquid ring pump for harsh, humid processes

The AWC 390 delivers 400 m³/h at 50 Hz and 420 m³/h at 60 Hz (saturated air) and reaches 33 mbar(a). The flat port plate with variable port opening keeps the delivery capacity stable over the whole rough vacuum range and saves operating water. Inlet and outlet DN 65, operating water connection Rp 3/4, dimensions 900 × 350 × 427 mm (L × W × H), weight 211 kg.

Why liquid ring?

In the pump an eccentrically mounted impeller rotates a ring of water, which seals the chambers and compresses the gas. In the process, the water absorbs the heat of compression – vapour, condensate, entrained liquid and particles hardly disturb operation.

Applications of the range

Atlas Copco lists plastics extrusion, expanded polystyrene (EPS), filtration, degassing, the evisceration of meat and poultry, and drying.

Variants of the AWC 390

Ehrler & Beck supplies the AWC 390 with a dual-frequency motor for 50 and 60 Hz (versions for Europe/China and for Korea/Japan), with a 50 Hz motor 380 V and without motor with lantern flange for a 50 or 60 Hz motor – in each case in grey cast iron with stainless steel impeller, entirely in stainless steel SS 304 or in SS 316L.

Features of the AWC range

• Single-stage liquid ring pump with flat port plate and variable port: stable delivery capacity over the whole rough vacuum range with economical operating water consumption
• Water as operating liquid: isothermal compression, insensitive to vapour, condensate, liquid carry-over and particles
• Impeller made of stainless steel as standard, corrosion-resistant
• Version with mounted motor and lantern flange: automatic motor alignment and automatic adjustment of the liquid level to the shaft centre line during filling
• Compact pump element, robust and proven design

Pumping speed 50Hz	400
Pumping speed 60Hz	420
Ultimate pressure	33
Rated motor power 50Hz	11
Weight	190
Length	90
Width	35
Height	42.7
Inlet connection flange	DN 65
Outlet connection flange	DN 65
Cooling method	Water cooling
Oil type	Oil-free

Additional technical data