Axiflow STS Standard Series Pumps


The Axiflow Technologies STS Standard Series of pumps consists of four (4) primary pump sizes.  Each pump size has up to five (5) different screw pitches which gives you the flexibility to customize each pump specifically for your application.  The smallest STSC50 size is only available is a C-face connection.  The STS70 and STS90 are available in both C-faced connection or bare shaft with coupling.  The largest pump, the STS125, is only available in bare shaft with coupling design:

STSC 50 (C-Face)   Suction/Discharge Connections – 1 ½” to 3”
STS 70   Suction/Discharge Connections – 2” to 3”
STSC 70 (C-Face)   (Not Shown) Suction/Discharge Connections – 2” to 3”
STS 90   Suction/Discharge Connections – 2 ½” to 4”
STSC 90 (C-Face)   (Not Shown) Suction/Discharge Connections – 2 ½” to 4”
STS 125   Suction/Discharge Connections – 3” to 8”

All standard series pumps are available in standard 3A and EHEDG design as well as aseptic design.  Pressure ratings on the standard series pumps range from 175 PSI to 350 PSI differential depending upon screw pitch.


View the STS Cross Section Spread


Axiflow Technologies offers a c-face motor connection for most pump designs and sizes.  This makes the motor self-aligning and can give you a much smaller footprint.  You can save anywhere from 12 to 30 inches!


STS Standard Flow Rates                                                                        STS Standard Pump Curves

 Flexibility Saves You Money!

 The Axiflow Twin Screw design enables the pump to run at the widest range of speeds of any other positive displacement pump on the market.  This capability enables one pump to be sized to handle a wide range of viscosities.  Imagine one pump handling the duty of many!

 With an all stainless steel wet end and bearing housing that is machined completely out of 316L billet stainless steel, the Axiflow pump can handle the widest range of temperature swings.  With the Axiflow pump, there is no such thing as “hot clearance” and “cold clearance” rotors.  The entire pump expands and contracts together.


Screw Pitches

With each pump size we offer a wide range of screw pitches.  The screw pitch is the distance from flight to flight.  With tighter screw pitches we can handle higher pressures.  With larger screw pitches, we can achieve higher flowrates and delicately handle larger soft solids.

In the table to the right, the screw pitches are in mm.  Take this
number and divide it by 2 and that is the particle size that can gently be pumped.STSSeriesPumpSpeedsChart



Pump Speeds

The most unique aspect of the Axiflow Twin Screw pumps is that they can
run at speeds up to 4,000 RPMs.  Typical rotary lobe, circumferential piston
and progressive cavity pumps are limited to 600 RPMs.  This ability to run at such a wide range of speeds enables The Axiflow Pump to perform process,
as well as CIP.

With high suction capability, the ability to run dry for hours, low shear pumping capability, delicate handling of soft solids up to 1-5/8” and the ability to deliver a smooth, non-pulsing, repeatable product flow, the Axiflow Pump is capable of pumping the widest range of product viscosities (1 to 1,000,000 cps), operating at the widest range of pump speeds (up to 4,000 RPMs), and operating at the widest range of product temperatures (up to 425°F) of any other PD pump (twin screw or otherwise) on the market!  These capabilities greatly reduce the wear on the pump and cost/need of spare parts.  This is why Axiflow pumps are proving to be the Lowest Total Cost of Ownership (TCO) for PD pumps.

Axiflow–The Original, Sanitary Twin Screw Pump.  Don’t just pump it—Axiflow it!





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