High pressure switching valve


Advanced high pressure switching valve 

Alltesta high pressure switching valve
  • Flexible configuration
  • Powered from USB cable
  • Serial commands via the  USB interface
  • Serial or TTL control 
  • Light position indication
  • Front LED doubles as a control button 
  • Small size
  • Low cost
  • Low energy consumption
  • Free PC based control software.
  • Direct control protocol for instrument integration

The  high-pressure switching valve is designed for chromatographic and general laboratory fluid management applications. The valve is engineered for flexible flow switching at different flow rates. 

It can be used for OEM applications or as a stand-alone device for different flow switching applications.
The valve is an alternative for manual injection in a high pressure stream or for switching of low and high pressure flows for chromatography and other similar applications. Several rotor and stator configurations are available


Available custom options

This Valve is available as OEM unit without enclosure with different mounting options.
High-flow version of the valve (preparative) is available which can allow flow rates up to 10 ml/min and a max pressure up to 2000 psi.
Metal-free version of the valve is available.
RS232 (via USB) is communication protocol for device operation. 
Simple PC based software for the valve operation is available.


  • Power requirements  USB type B
  • Dimensions 6.0 cm x 4.5 cm x 12 cm   (2.5”w x 2.0”h x 4.5”d)
  • Weight 0.5 kg (1.1 lb)
  • Switching speed for 60 degree 0.2 sec
  • Max pressure 350 bar (5000 psi)
  • Ports style is 10-32 thread with conical 1/16″ tube compression type seal.
  • Materials in contact with liquid: diamond coated SS316, Vespel® or PEEK  

Valve rotor position indication

LED color indicates valve’s rotor position. By pressing LED the rotor can be advanced one position. Depends on the valve configuration the second press will advance rotor forward or backward.

Position 1 LED color green

Position 2 LED color navy

Position 3 LED color purple

Position 4 LED color blue

Position 5 LED color red

Position 6 LED color white

Available configurations:

5 connections
2 grooves
5 positions
5 connections
1 grooves
5 positions
7 connections
1 grooves
6 positions
6 connections
3 grooves
2 positions
6 connections
3 grooves
5 positions