ALISUN double eccentric butterfly HPBV description: Bright side of the valve industry ALISUN brand designed to provide high performance double eccentric butterfly valves, special floating seat design, based on the direction of the source of pressure, automatically adjust the seat position, to hold the valve-sided the effect of pressure and increases the life of the seat, with the market requirements and air separation experiment, the service life of up to 50 million times, the valve shaft through a special dust-proof design prevents fluid from entering the valve shaft create a situation where the valve shaft stuck butterfly valve type according to different conditions, the choice of stainless steel or other special alloy steel for owners to use seat provides PTFE, RTFE, PEEK, METAL and other materials for the petrochemical, oil refining, air separation, CDA and so most of the different temperatures The working conditions and pressure situations. Main features: 1. unique structure, holding pressure-sided design, the valve strength accord: ASME B16.34, API 598 2. Full range of pressure ring structure 3. The full range of patented electrostatic guiding device configurations are attached to the structure 4. Meet Ex certification : ATEX 94/9 / CE Group II Category 2 GD 5. full-bore fire tests required by API 607 ??6. metal seat leakage class according to ANSI FCI 70-2-2003 Table 1 CLASS IV 7. escape valve shaft in line with EPA Method 21 Test and TA-LUFT Fugitive emissions requirements (OPTIONS)