Spiral Wound Ultrafiltration System

Ultrafiltration System

Spiral Wound Ultrafiltration System
Katalog Video

Highlights and application:

Ultrafiltration (UF) is a well proven technology offering a wide range of opportunities for modern dairy processing. The spiral wound UF SW system is characterised by:

-Low plant investment

-Low space requirements

-Easy membrane change

-Optimal for low to medium viscosity products

The SW membrane element has a unique design, where a large membrane area is wound into a compact element. SW elements are available with:

-Various diameter (3.8-8 inches)

-Various lengths (38-40 inches)

-Various feed spacers (20-130 mil)

-Special design for high pH/high temperature CIP

-Membranes with various MW cut-off

(1,000 – 100,000)

The membrane elements are fitted into stainless steel housing to form a module, and a number of modules are built into a plant. Based on proven, modular components, each plant is customised to fit the individual application. Further, the plant design allows for access to maintenance of all vital parts as well as for future cost effective plant modifications. UF plants with SW membrane elements can be supplied with any type of process automation ranging from a simple, manual to a fully automatic system, integrated in the overall factory control system.

Typical applications of UF SW systems within the Dairy Industry are as follows:

-Whey Protein Isolate (WPI)

-Milk Protein Concentrate (MPC-

-Milk protein Isolate (MPI)


-Protein Standardization for Cheese Production

-Cheese :Feta, Domiati, Queso Fresco etc.


Standard UF Plants with fixed capacities which are manufactured by this company are as follows:

Feta Cheese:5000-15000 Lit/hr

Whey Protein Concentrate (WPC): 5000-30000 Lit/hr

Milk Protein Concentrate (MPC): 5000-30000 Lit/hr

Higher capacities are available based upon request and can be tailor made.


UF Plant usually includes the following components:

-Closed balance tank including level transmitter, floater and  CIP device

- Valve manifold including set of change over valves and automatic butterfly valves

- Feed pressure system including feed pump, flow transmitter and in line filter

-UF Modules and filters

- Re circulation loops each including circulation pump, tubular heat exchanger, pressure and temperature transmitters, flow indictors and sampling device

-Retentate/Permeate system including modulating valves, flow transmitter, permeate pump

-Equipment for flush water including shut off valves and adjustment valves

-Equipment for steam and cooling water including shut off valves and non-return valves

-Set of pipes and fittings

-Set of shut off valves for water balance tank

-Set of instruments such as temperature and pressure transmitters.

-Stainless steel control panel including PLC, HMI, power supply, solenoid valves, motor starters, MCC etc.

-All of the UF plants  are tested in our factory before delivery

-The UF Plant Panel/Programme ensures the following are realized:

1-Automatic temperature control in the loops

2-Automatioctotal solid ration control in the final retentate

3-Recording feed and retetnate flow and each loop temperature as long as long as the memory of HMI allows it


UF plant can include the following options:

-Automatic CIP dosing unit

-Refractometer for online measurement/control of final product brix

-In line cartridge filters for soft water input

-In line filter for product with 10 micron filter

-Mix proof product manifold valve on feed, retentate and permeate inlet/outlet

-Conductivity transmitter for CIP dosing

-Automatic shut off (Isolation) of each loop to cut water consumption during CIP

-Flush water seal re circulation system. Reducing water circulation

-UPS (Uninterrupted Power Supply)

-Air cooler for Control Panel


The UF plant is designed fully automatic and from HMI all of the operation parameters and program sequences can be controlled and monitored. Also, all of the necessary process alarms are already incorporated into the program. The operation presence is only required during operation as surveillance The following process sequences are realized automatically:

-Start up/ Recirculation/Ready for product

-Pre concentration


-Re circulation of product



-Cleaning in place (CIP)


The required utilities for running the UF plant are as follows:

-Power supply: 

3x400 V AC, 50 Hz (Other voltage and frequencies are also available upon request)  

-CIP water supply:         

2-3 bar(g) @ 10-50 C

-Cooling water supply:  

2-3 bar(g) @ 10-50 C

-Ice water supply:          

2-3 bar(g)@1-2 C

-Shaft seal water supply:

2-3 bar(g) @ 10-50 C

-Steam pressure:            

2-3 bar(g)

-Air supply:                

6 bar (g) Instrument air, free from oil


Membrane cleaning detergent for manual or automatic dosing (Henkel or Diversey or Novadan)



KROMEL manufactures has accordance with ISO 9001:2008 Quality, ISO 14001 Environment, OHSAS 18001 Occupational Safety, ISO 10002 Customer satisfaction processes and our company has ISO 9001:2008, ISO 14001:2004, OHSAS 18001:2007, ISO 10002:2004 certificates.

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