Alfa Laval SX UltraPure Rotary lobe pumps

Introduction

The Alfa Laval SX UltraPure Rotary Lobe Pump is designed with

optimized pump head geometry and multi-lobe rotors to ensure

low-shear operation with minimum pulsation. This makes the SX

UltraPure the best choice for maintaining the integrity of delicate

products in high-purity applications.

The pump is designed according to the most stringent hygienic

design standards and with verified, effective Cleaning-in-Place

(CIP) and Sterilization-in-Place (SIP).

Applications

The SX UltraPure Rotary Lobe Pump is designed for gentle

transportation of process fluids in high-purity applications across

the biotechnology, pharmaceutical, and home and personal care

industries.

The SX UltraPure is available with 14 different pump head

displacements based on seven different gearbox modules to

handle flow rates up to 115 m3/h and differential pressures up to

15 bar.

Benefits

• Low pulsation and very gentle pumping, making the pump

ideal for sensitive products.

• Minimized shearing to protect end-product quality.

• Low maintenance, increased process uptime.

• Low contamination risk due to full material traceability and

USP Class VI elastomers that reduce the risk of process

contamination from extractables.

• Smooth qualification, validation and process control: material

traceability, and pump supplied with the Alfa Laval Q-doc

package in line with Good Documentation Practices.

Standard design

All media contacting steel components, like the rotor case, front

cover, rotors and rotor nuts, are in W. 1.4404 (AISI 316L). The

stainless steel gearbox provides maximum shaft rigidity and easy

oil seal replacement. The gearbox design is universal, which

enables the flexibility of mounting pumps with the inlet and outlet

ports in either a vertical or horizontal plane by changing the foot

and its position.

The standard Alfa Laval SX UltraPure has four-lobe rotors rated to

150°C, facilitating use with CIP and SIP processes

Fully front-loading and fully interchangeable single, single flushed

and double mechanical shaft seals are available. All media

contacting elastomers are controlled compression joints, the

latest technology where static and dynamic elastomer seals are

used to prevent leakage of pumped media to the atmosphere.

The Alfa Laval SX UltraPure can be supplied either as a bare

shaft pump or mounted on a base plate complete with coupling,

guard, gear motor and shroud for easy, plug-and-play installation.

Working principle

A gear train in the pump gearbox drives the rotors and provides

accurate synchronization of the multi-lobe rotors. The movement

of the counter-rotating rotors creates a partial vacuum that allows

atmospheric pressure or other external pressures to force fluid into

the pump chamber. As the rotors revolve, an expanding cavity

forms, filling with fluid. As the blades disengage, each dwell forms

a cavity. As the rotor blades engage, the cavity diminishes and

fluid is displaced into the outlet port.