PSG Biotech Products

From Laboratory to Commercial Scale

Best-in-class pump, flow control and flow-measurement solutions that safely transfer and precisely meter the most delicate of biologics, medicines and therapeutics, all while increasing yield, throughput and speed to market.

View Our Products

Four-Piston Diaphragm Pumps

View All

Coriolis Flow Meters

View All

Ultrasonic Sensors

View All

Pulsation Dampeners

View All

Flow Control Valves

View All

Technology

View All

Quattroflow Markets

Ideal solutions for critical applications

Quattroflow® develops and manufactures quaternary (four-piston) diaphragm pumps specifically designed for critical applications in the biopharma industry.

View Our Markets

Drives for Quattroflow Pumps

Motor Types

AC Induction Motor (Three-Phase)

  • Most commonly used motor in the world for industry applications
  • Standardized motors, available from different manufacturers
  • Cost effective
  • Variable Frequency Drive (VFD) is needed to control motor speed and thus pump flow rate
  • Required power supply: three-phase grid (e.g. 3 x 230/400 VAC @ 50 Hz or 60 Hz)
  • Active cooling is needed for low rotations speeds
  • External thermal protection via VFD with PTC thermistors
  • Limited torque at low rotation speeds
  • Multi-polar motors and gearboxes are available to reduce the speed and to increase the torque

Pumps and Applications

  • Processes that do not require high turn-down ratios like recirculation pump for TFF processes
  • Fully automated systems with electrical cabinet for the variable frequency drive (frequency converter)

For Quattroflow pumps:
Multiple-Use Pumps and Single-Use Pumps
QF1200 Series, QF4400 Series, QF10K Series and QF20K Series

Synchronous Servo Motor

  • With permanent magnets
  • High efficiency and very compact sizes
  • Motor rotating speed (rotor) = speed of the electric field (stator)
  • Defined rotor position
  • Rotation speed with high accuracy
  • Special controller/VFD are needed (depends on motor type)
  • Internal protection systems (thermal, overload) or via VFD
  • Available in many different power classes

Pumps and Applications

  • Processes that need a very high turndown capability like chromatography or buffer in-line dilution
  • Batch dosing or inline dosing where high accuracy is needed

For Quattroflow pumps:
HT-Compact Pumps
QF1200-HT Series, QF5050 Series and QF4400HT Series

Ideally suited for OEM pumps designed with small dimensions

Brushless EC-Motor

  • With permanent magnets and internal electronic circuitry system
  • Electronically commutated motor (EC-motor)
  • Similar to a synchronous induction motor
  • Most motors with DC power supply, AC is also possible
  • High efficiency and compact sizes
  • Special converter/amplifier are needed (depends on motor type)
  • Passive cooling systems
  • Internal protection systems (thermal, overload)
  • Only available in small power classes

Pumps and Applications

  • Processes that need a very high turndown capability
  • Batch dosing or inline dosing where high accuracy is needed

For Quattroflow pumps:
Multiple-Use Pumps and Single-Use Pumps
QF150 Series and QF1200-CV Series

Ideally suited for OEM pumps designed with small dimensions

Pump Designs and Control

1.) Plug-and-Play Pumps: mostly used by end users and in small systems

Feature an integrated drive and pump controller inside the pump housing (e.g. QF150 Series, QF1200-HT Series, QF4400-HT Series).

  • The pump is ready to use
  • Small dimensions and low weight
  • With cable and plug for different electric grids
  • Analog-input for external control (e.g. 4-20mA, 0-5VDC…)
  • Keypad for manual (internal) control
  • Standard Quattroflow design with baseplate and housing

2.) With external control box as option (e.g. QF4400, QF5050, QF10k, QF20k)

  • External stainless-steel box additional to the pump
  • With frequency converter/power supply unit/controller for the respective motor
  • Analog-input for external control (e.g. 4-20mA, 0-5VDC…)
  • Keypad for manual (internal) control

3.) OEM pumps: mostly used by skid manufacturer and for large systems

  • External stainless-steel box additional to the pump
  • With frequency converter/power supply unit/controller for the respective motor
  • Analog-input for external control (e.g. 4-20mA, 0-5VDC…)
  • Keypad for manual (internal) control
  • The motor/drive has to be wired by the customer
  • External control via analog-inputs or other signals
  • Very small and smart pump design
  • With motor flange, without housing and base plate or in standard design with baseplate and housing
  • High flexibility
  • Adaptation due custom designs

The Ratings of Different Motor Types Used for Quattroflow Pumps

Characteristics in relation to Quattroflow pumps:

AC induction motor (three-phase) Brushless EC Servo Motor Synchronous Servo Motor
Flat-torque curve (high turndown) * *** ***
Available power classes and motor sizes *** * ***
Small dimension and slight weight * *** ***
Variable power supplies *** ** ***
Cooling effort * *** ***
Variability and design variants *** * **
Control variants *** ** ***

* Poor ** Medium *** Good