AlfaPure Z7

Using high-speed centrifugal separation it is possible to greatly extend the life of your service liquids. Alfa Laval’s disc-stack centrifuges provide fast, efficient, simultaneous three-phase separation of, for instance, water, oil and sludge.

Product Description

AlfaPure Z7 removes contaminating oil, grease and solid particles from water-based liquids, e.g. coolants and wash liquids. The result is lower costs due to reduced fluid consumption, lower disposal costs and improvements in both product quality and working environment which also means increased productivity.

AlfaPure Z7 is a complete system, including separator, feed pump, sludge pump and control system. The touch screen based control system makes it extremely easy to operate. The AlfaPure Z7 has a high capacity-to-size ratio. The module requires less than 2.6 m2 of floor space and can handle tanks with volumes of up to 250 m3. In most cases, AlfaPure Z7 is installed in a bypass system and operates continuously.

User-friendly operation

Operator convenience was a key parameter in the design of the AlfaPure Z7. The PLC-based control system is operated by means of a touch screen. All symbols and messages are easily understandable, simplifying the interaction between operator and machine. The control system handles all settings of valves and pumps automatically. The separator is accessible from the front and the openable cabinet gives easy access to process components. Quick couplings ensure that all components can be serviced quickly and simply.

The system is compact. A stainless steel cabinet is mounted on a 1270 x 2030 mm stainless steel frame. The connection interface makes installation simple.

Modularized system

The modular design of the AlfaPure Z7 makes it easy to adapt the system to the specific needs of the user. Several options and optional equipment are available:

  • Siemens or Allen-Bradley PLC control system,
  • Surface suction device,
  • Crossflow filter for heavily contaminated coolants,
  • One or two dosing pumps for addition of chemicals,
  • Stainless steel design of all components that come into contact with the fluid.

Technical data


AlfaPure Z7-5 3000–5000 l/h (13–22 gpm)
AlfaPure Z7-7 5000–7000 l/h (22–31 gpm)

Operating requirements

Separation temperature 15–100°C (60–210°F)
pH 6-14
Operating water pressure 200–600 kPa (30–85 psi)
Instrument air pressure 500–1000 kPa (73–145 psi)
Installed power max 10 kW
Ambient temperature 5–55°C (40–130°F)


Length x width x height 2030 x 1270 x 1540 mm (6.7 x 4.2 x 5.1 ft)
Weight 1270 kg (2800 lbs)

Electrical System

(Three options)

210–250 V, 380–480 V, 560–690 V
Frequency 50/60 Hz


Process liquid inlet ISO-Rp 2″
Heavy liquid outlet ISO-Rp 1 1/4″
Light liquid outlet ISO-Rp 3/4″
Sludge outlet ISO-Rp 1/2″
Operating water quick-coupling Hose 1/2″
Instrument air quick-coupling Hose 5/16″

Shipping data

System incl. centriguge, bowl and motor 1270 kg (2800 lbs)
Bowl weight 136 kg (300 lbs)
Gross weight 1450 kg (3200 lbs)
Volume 6.57 m3 (232 ft3)