American Machinist

Producing near-perfect fluid check valves.(Technology Trends)

VALVE MANUFACTURERS CAN NOW inspect parts during assembly rather than after thanks to an electromechanical assembly press (EMAP) from Promess Inc., Brighton, Mich. The process lets check-valve companies make near-perfect valves at [+ or -] 2-psi tolerances.

EMAP uses no pneumatics or Hydraulics--instead, press motion is initiated by a servomotor and ballscrew. A computer monitors ram position and pressing force and accepts data from additional monitoring devices. To make a check valve, the EMAP is equipped with an attachment that pumps fluid through the valve at 1. …

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