Description
Application
The Alfa Laval OS Twin Screw pump range combines process flexibility with the highest quality standards. The Alfa Laval OS range has been certified by EHEDG and conforms to the 3A standard. Consequently, it is designed for use in applications within the Dairy, Beverage and Food industries where cleanability is paramount. With a front loading cartridge shaft seal, a rigid stainless steel gearbox with timing gears located between bearings, providing balanced loading of the shaft assembly and an oil chamber design with enhanced lubrication to the bearings and gears the Alfa Laval OS Twin Screw pump is designed for optimal reliability and quick and easy
maintenance.
The Alfa Laval OS Twin Screw pump is available in nine models based on three frame sizes. Each frame size is available with three different screw profiles for varying pressure, flow and solids handling capabilities.
[youtube https://www.youtube.com/watch?v=8P10rHZOo_U&w=560&h=315]
TECHNICAL DATA
Standard materials
Pump casing . . . . . . . . . . . . . . . . . W. 1.4404 (316L), diffusion
hardened
Screws, front cover, seal housing: . . . W. 1.4404 (316L)
Product wetted elastomers: . . . . . . . EPDM
Other elastomers: . . . . . . . . . . . . . . FPM
Shaft seal: . . . . . . . . . . . . . . . . . . . Single flush, Silicon Carbide/Silicon Carbide
Gear box: . . . . . . . . . . . . . . . . . . . Stainless steel
Base plate: . . . . . . . . . . . . . . . . . . Stainless steel
Coupling guard: . . . . . . . . . . . . . . . Stainless steel
Motors
Direct coupled motor, 4, 6 or 8 poles, or gear motor, 4 poles, to IEC metric standard, 50/60 Hz, suitable for frequency conversion, IP55, insulation class F.
Warranty
Extended 3-years warranty on Alfa Laval OS pumps. The warranty covers all non-wear parts on the condition that genuine Alfa Laval Spare Parts are used.
Shaft seals
Single, Single flush and double mechanical cartridge seals available. All
options are fully front loading and interchangeable.
Flushed seals, connections
OS22 – OS36: . . . . . . . . . . . . . . . . 1/4″ G
OS42 – OS46: . . . . . . . . . . . . . . . . 1/2″ G
Max flush pressure
Single flush: . . . . . . . . . . . . . . . . . . 0.5 bar
Double mechanical: . . . . . . . . . . . . . 16 bar (max 6 bar over
product pressure)
Flush flow rate . . . . . . . . . . . . . . . . 30 l/hr
Pressure
Max inlet pressure . . . . . . . . . . . . . . 16 bar
Max discharge pressure . . . . . . . . . . 16 bar
Temperature
Process, max . . . . . . . . . . . . . . . . . 100°C
CIP/SIP, max . . . . . . . . . . . . . . . . . 150°C
Note: For higher temperatures, please contact Alfa Laval.
