SD343H Telescopic Butterfly Valve Overview:
The body and seat of the SD343H telescopic butterfly valve are conjoined components, and the sealing surface layer of the valve seat is overlay-welded with a temperature-resistant and corrosion-resistant alloy material. The multi-layer soft stack type seal ring is fixed on the valve plate. Compared with the traditional butterfly valve, this type of butterfly valve has high temperature resistance, light operation, no friction during opening and closing, and closes as the torque of the transmission mechanism increases to compensate the seal when closing, improving the butterfly valve. Its sealing performance and extended service life are suitable for high temperature, high pressure, corrosion and abrasion resistance industries.
Structural features of SD343H telescopic butterfly valve :
1. Novel and reasonable design, unique structure, light weight, convenient operation and fast opening and closing;
2. In addition to the function of adjusting and shutting off, the telescopic butterfly valve can compensate for the thermal expansion and contraction caused by the temperature difference of the pipeline, and it can also facilitate the installation, replacement and maintenance of the valve;
Main technical parameters of SD343H telescopic butterfly valve
（ mm ） DN ( mm )
～ 2000 50 ～ 2000
（ MPa ） PN ( MPa )
Hermetic seal test
℃ ≤80 ℃
Air, water, steam, gas, oil, etc.
Manual, worm and worm drive, pneumatic drive, electric drive.
Material of SD343H Telescopic Butterfly Valve :
Cast iron, cast steel, stainless steel, chromium-molybdenum steel, alloy steel
Cast steel, alloy steel, stainless steel, chrome molybdenum steel
Rubber, Teflon, Polyester, Stainless Steel
、不锈钢、铬钼钢 2Cr13 , stainless steel, chrome molybdenum steel
Cast iron, cast steel, stainless steel, chrome molybdenum steel