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You are at > Flow Selection Valves
What is an Flow Selection Valve?
Bio-Chem Valve ™ Flow Selection Valves combine multiple valve actuators into a single, compact unit. Because each actuator operates independently, Flow Selection Valves can combine or select any combination of between 2 and 8 individual source streams. Valves are situated around a central block, providing flow paths of equal length (read more on flow selection valve operation).
Bio-Chem Valve™ Flow Selection Valves are similar in construction to our Solenoid Operated Isolation Valves.
Because the fluid path can be made from extremely inert materials
(such as PTFE and PEEK), Bio-Chem Valve ™ Flow Selection Valves are
particularly suitable for use in highly aggressive and / or high purity
fluid applications. (Download brochure – Flow Selection Valves).
Features of the Solenoid Operated Flow Selection Valve:
- 12 volt or 24 volt DC solenoid
- Choice of number of valves / inlet ports (All Flow Selection Valves have the specified number of inlet ports PLUS a common port. For
example, a 3-port valve has a total of four ports (three inlet and one common).
- Inert fluid path with only two wetted components made entirely from chemically inert materials
- Choice of materials -(read more - Plastics & Polymers Reference Page)
- Body materials: PTFE, PEEK, PPS
- Diaphragm materials: PTFE, FFKM, EPDM (not all available online - contact us for more info)
- Choice of valve orifice sizes – Precisely machined valve orifice sizes from 0.032” (0.81 mm) to 0.125” (3.2 mm) in three different valve sizes (Read more – download brochure – Flow Selection Valves).
Customization Services. We offer customized solutions on our solenoid operated isolation valves to meet equipment makers’ precise specifications. Refer to our Customization page for more details. |
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Valve style |
Max pressure |
Valve orifice |
Int. vol. |
2 ports (2 inlets plus one common port) |
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20 psi |
0.032" |
35µl |
20 psi |
0.062" |
57µl |
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10 psi |
0.125" |
612µl |
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Valve style |
Max pressure |
Valve orifice |
Int. vol. |
3 ports (3 inlets plus one common port) |
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20 psi |
0.032" |
91µl |
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20 psi |
0.032" |
69µl |
20 psi |
0.062" |
231µl |
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10 psi |
0125" |
1164µl |
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Valve style |
Max pressure |
Valve orifice |
Int. vol. |
4 ports (4 inlets plus one common port) |
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20 psi |
0.032" |
120µl |
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20 psi |
0.032" |
90µl |
20 psi |
0.062" |
257µl |
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10 psi |
0125" |
1533µl |
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Valve style |
Max pressure |
Valve orifice |
Int. vol. |
5 ports (5 inlets plus one common port) |
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20 psi |
0.032" |
120µl |
20 psi |
0.062" |
249µl |
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Valve style |
Max pressure |
Valve orifice |
Int. vol. |
6 ports (6 inlets plus one common port) |
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20 psi |
0.032" |
143µl |
20 psi |
0.062" |
417µl |
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10 psi |
0.125" |
2615µl |
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Valve style |
Max pressure |
Valve orifice |
Int. vol. |
8 ports (8 inlets plus one common port) |
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20 psi |
0.032" |
216µl |
20 psi |
0.062" |
653µl |
Operation
 Bio-Chem Valve™
Flow Selection Valves are similar in construction to Solenoid Operated Isolation Valves. A flexible diaphragm isolates the solenoid actuation mechanism from the fluid path. When a valve is energized, the solenoid retracts the armature that is attached to the flexible diaphragm. This raises the diaphragm allowing fluid to flow between the common port and an outlet. When de-energized a spring forces the diaphragm down, closing off the flow path.
Bio-Chem Valve™ Flow Selection Valves are typically used in one of two main applications: Flow Mixing (flow from multiple inlets to one common outlet), and Flow Selection (flow from common inlet split into multiple outlets). Read more in the Flow Selection Valves brochure.
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