Underground Service

Special valves for underground service are manufactured by DAFRAM for gas distribution services. Depending on the specific case, DAFRAM’s valves are designed acc. To API6D, BS5351, ASME B16.34 and UNI-CIG 9734 – D.M.54/11/84, and available with bolted, seal welded or fully welded bodies, Full and Reduced Bore, from 1” up to 36”, body ratings 150lbs to 2500lbs.

All valves may be supplied for installation in pit or buried, Floating and Trunnion Mounted with BW ends according to ASME B16.25, anti-blow out stem, anti-static device, equipped with stem extensions to the main international standards and rules. Special executions with welded on pipe nipples (pup pieces), special purging bleed connections and stem extensions of specific length are available upon request.

Trunnion Mounted Ball Valves are Double Block and Bleed to API-6D and with Self Relieving or Double Piston effect seats.

External surface protection for underground applications is generally given by Epoxy Resin Coating with thickness 100μm to 1500μm. Other painting cycles may be performed upon request.