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Class Information
Number: 137/246.21
Name: Fluid handling > With cleaner, lubrication added to fluid or liquid sealing at valve interface > Liquid supplied at valve interface > Spring biased piston feed
Description: Valves wherein the lubricant feed means is a spring biased piston.

Patents under this class:

Patent Number Title Of Patent Date Issued
4671915 Method for making a glass precision valve Jun. 9, 1987

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