Flow Selection Valves

Bio-Chem Flow Selection Valves

Compact multichannel selection and mixing valves for OEM systems and industrial analysis

Bio-Chem Flow Selection Valves combine several inert solenoid valves in one compact manifold. Each port is controlled by its own actuator, so the valve can open, close or combine several fluid channels independently of each other. This makes the Flow Selection Valves ideal for OEMs and machine builders who need a reliable, compact and low-maintenance solution for sample selection, reagent switching, flow splitting or flow mixing.

All wetted parts are made of fully inert materials such as PTFE, PEEK, PPS and FFKM, so these valves perform excellently in aggressive, corrosive and high-purity applications.

How does a Flow Selection Valve work?

Flow Selection Valves use the same proven principle as Bio-Chem isolation valves:

1. Several solenoid actuators in one block

Instead of separate valves with interconnecting tubing, one housing contains 2 to 8 independent solenoids.
Each actuator operates one inlet port.

2. Diaphragm-controlled, inert seal

A flexible, chemically resistant diaphragm separates the coil from the fluid path.
When the solenoid is energised:

1. the armature moves up,
2. lifts the diaphragm,
3. and opens the flow channel between the common port and the selected inlet/outlet.

At rest, spring pressure closes the channel completely ("bubble-tight").

3. Radial, symmetrical flow paths

All ports are arranged in a circle around the common port, so:

1. all flow paths are exactly the same length,
2. the pressure drop is identical,
3. internal volumes remain consistent,
4. timing and mixing behaviour are reproducible.

4. Flexible operating modes

The valve can be used for:

1. Flow selection: one common inlet → one of the selected outlets
2. Flow splitting: common inlet → several simultaneous outlets
3. Flow mixing: several inlets → one common outlet
4. Gradient formation: dynamically varying the contribution per port

Belangrijkste voordelen

1. Compact integration of 2 to 8 valves

One block replaces complete sets of separate valves and interconnecting tubing.

2. Minimal dead volume

The internal volumes are very small, and there is no extra tubing between ports.

3. Individual channel control

Each port has its own actuator → no complex mechanical rotary selectors needed.

4. Up to 2+ million switching cycles

Robust solenoid technology and high-grade materials.

5. Uniform flow characteristics

All actuators are individually adjusted to an identical flow at equal pressure.

6. Fully inert fluid path

No metal parts in contact with the medium → suitable for aggressive reagents.

Product series and technical features

040T Series: very compact & low energy consumption

• 3 or 4 ports
• Orifice: 0.032" or 0.054"
• Power: 1.9 W
• Pressure: up to 20 psi
• Materials: PPS or PEEK + PTFE/EPDM/FFKM
• Typische modelcodes:
  • 040T312-32-4
  • 040T412-54-5E

080T Series: widely applicable, 2 to 8 ports

• 2, 3, 4, 5, 6 or 8 ports
• Orifice: 0.032" or 0.062"
• Power: 2.9 W
• Materials: PTFE, PPS, PEEK + PTFE/EPDM/FFKM
• Pressure: up to 20 psi
• Typische modelcodes:
  • 080T312-32
  • 080T612-62-4P
  • 080T812-32-5E

105T Series: highest flow capacity

• 2, 3, 4 or 6 ports
• Orifice: 0.125" (3.2 mm)
• Power: 8.0 W
• Body: all PTFE
• Pressure: up to 10 psi
• Typische modelcodes:
  • 105T212-125
  • 105T412-125
  • 105T612-125

Toepassingen in OEM & Maakindustrie

Flow Selection Valves are used in:

• Analytical chemistry instruments (HPLC, ICP, TOC)
• Clinical diagnostics and medical sample systems
• Preparative or sequential reagent handling
• Lab automation and high-throughput workflows
• Inline mixing and splitting applications
• Industrial process analysis
• Multichannel sampling modules

For OEMs, these valves are an efficient, space-saving and low-maintenance solution.