Media Valve The Mosites Butterfly Valve was first manufactured in 1961 as part of a product line of corrosion/ erosion-resistant rubber products made by Mosites Rubber Company of Fort Worth, Texas. Incorporated in 1968 as Media Valve Company, our design concept of bonded elastomeric lined surfaces affords the end user an economical means of complete isolation of flow stream contaminants. Our close association with Mosites Rubber Company assures us of constant access to the highest quality elastomeric compounds. Only foundry castings, miscellaneous steel parts and automation devices are supplied by outside vendors. All of the elastomeric compounds used by Media Valve Company are custom blended and compounded at our own facilities in Fort Worth. A large inventory of raw body castings is maintained for immediate production. Our air conditioned manufacturing facility houses all of the required machining and molding equipment. In strict accordance with the highest quality standards, every Mosites Butterfly Valve is subjected to applicable hydrostatic seat seal and shell test requirements. With immediate access to Dallas/Fort Worth International Airport, and close proximity to the Port of Houston, Media Valve Company freight traffic experts work closely with all major air and ocean freight forwarders. Media Valve Company, we have a resolute commitment to servicing our customers needs, and we believe in the absolute value of our products.