Product category:
Manual Valves
News Release from: Bio-Chem Valve and Omnifit | Subject: 32-position valve
Edited by the Laboratorytalk Editorial
Team on 30 September 2003
32-position valve solves fluid transfer
dilemma
Omnifit has helped the manufacturer of a cell analysis instrument solve a difficult fluid transfer problem by providing a custom-designed 32-position inert rotary valve
Omnifit has helped the manufacturer of a cell analysis instrument solve a difficult fluid transfer problem by providing a custom-designed 32-position inert rotary valve The customer required a 16-port electrical rotary valve, with four of the ports capable of handling a wax material at 70C, and the remaining 12 ports required to handle aggressive fluids
This article was originally published on Laboratorytalk on 6 Aug 2001 at 8.00am (UK)
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The valve also had to be able to switch to an 'off' position between each port, requiring a total of 32 positions.
The customer also had specific dimensional limitations for the valve which added additional challenges to the design process.
After holding extensive consultations with the client's engineering team to determine their specific requirements, Omnifit designed and manufactured prototypes to enable the customer to undertake validation studies.
Once the final design was agreed, manufacturing was scheduled to meet the client's call-off requirements.
The custom solution devised by Omnifit was based on an inert rotary valve with a stainless steel rotor and a PTFE body.
The internal flow paths are 4mm in diameter to maintain adequate flow rate.
Integral heaters are incorporated to maintain the valve assembly at 70C, ensuring the wax fluid flows smoothly through the required ports.
An optical encoder ensures accurate positioning of the rotor to maximise flow rate.
Driven by a 24 volt DC motor, the valve is positioned using computer-controlled TTL compatible signals.
Overall dimensions of the valve are 210mm x 140mm x 110mm.
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