Valve dispenses for precision assembly
An
EFD product story
Edited by the Engineeringtalk editorial team
Dec 3, 2004
The 741MD-SS MicroDot dispense valve is designed for precision assembly operations where fluid deposits as small as 0.004in in diameter are required.
The 741MD-SS MicroDot dispense valve is designed for precision assembly operations where fluid deposits as small as 0.004in in diameter are required.
It applies consistent, precise amounts of most assembly fluids, including UV-cure adhesives, solvents, lubricants and epoxies.
Unlike typical needle valves, the 741MD-SS features a unique design where the internal needle seats in the hub of the dispensing tip instead of in the valve body.
This approach provides exceptional control over deposit size by reducing the amount of dead fluid between the needle seat and substrate to the absolute minimum.
The compact, pneumatically operated 741MD-SS valve is ideal for critical bonding applications on medical devices, fibre optic components, disk drives and similar products with very fine tolerances.
It will provide extremely accurate results with the 22 to 33 gauge dispensing tips typically used in these processes.
The valve also features a handy calibration knob that allows the user to quickly restore the proper valve stroke setting and tip-to-substrate distance whenever a new dispensing tip is installed.
Operation of the MicroDot valve is regulated with an EFD ValveMate 7000 controller that simplifies setup and allows valve open time to be adjusted at the dispensing station.
The dedicated controller gives the user exceptional control over the amount of assembly fluid applied, without the need to reprogram a PLC (programmable logic controller) or interrupt production.
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