Product Type: Gate ValveProduct Name: Expanding Gate ValveProduct Details:Place of Origin: ChinaCertification: ISO9001-CEProduct DescriptionExpanding gate forms tight positive mechanical sealDouble block and bleed capabilitiesSeals at low and high line pressureSeat faces are outside the flow stream in the fully open or closed position considerably extending seal lifeSealant injection fittings available for emergency situationsBonnet to body and yoke tube to bonnet connection secured by dual sealThermal relief provided as standard with optional by-pass system for fugitive emission controlAvailable in line sizes 2" - 36", class 300-1500