View Larger Image MODEL 1 Turns 30 Kerotest celebrates 30 years of continuous service of the Model 1 gate valve in the natural gas distribution industry. KerOTest34562019-01-04T17:04:10+00:00November 19th, 2018| Share This Story, Choose Your Platform! FacebookTwitterRedditLinkedInWhatsAppTumblrPinterestVkEmail About the Author: KerOTest3456