Double eccentric Butterfly valves (HB series) SERIES

Double eccentric Butterfly valves (HB series)

Valve nominal sizeSHB50A～300AUHB40A～300AApplicable flange5UHBJIS 5K10SHB・10UHBJIS 10K16SHB・20UHBJIS16K, JIS20K150SHB・150UHBASME Class 150Maximum allowable pressure5UHB0.7MPa10SHB・10UHB1.4MPa16SHB・20UHB2.0MPa150SHB1.72MPa160SHB1.9MPaService temperature rangeSHB-10～+200℃UHB-29～+200℃Face-to-face dimensionsJIS B 2002 46 seriesFlow directionBidirectional flow*Applicable gaskets(commercially available gaskets)Joint seats (Minimum thickness 1.5 mm)Spiral wound gaskets / Envelope gasketsAutomatic valves PartsMaterialSHBUHBBodyFCD450-10SUS13A/A351 Gr.CF8StemSUS420J2SUS304N2DiscSUS13A+Cr platedGlandSCS13ASeat ringRPTFE(Carbon fiber-filled PTFE)Seat retainerS45CSUS304Stem bearingPTFE(Metal backed)Gland packingPTFEGasketPTFE Chemical-resistant RPTFE is adopted as seat material, so that it can be used for fluids that cannot be handled with rubber seats. (See the table for  “Corrosion resistance level of materials of disc and seat against fluid” on page 4 of the catalog.) The double eccentric structure minimizes the contact between the disc and the seat during operation and provides stable sealing performance with less wear of the seats over a long period of time. (Fig.1) Retightening of packing is possible without removing the operatin device. (Fig. 2) Applicable to both of the direct and reverse flow control, however, flow pressure from the retainer side is recommended. Joint seats (minimum thickness 1.5mm), spiral wound gaskets and PTFE envelope gaskets conforming to  the applicable sta