Key Specifications/Special Features: 01.Nominal pressure:normally PN16bar, specially PN25, 40, 63bar 02.Adopt bellows+packing double sealing, zero leakage at valve stem 03.Valve body material:cast steel WCB(code:C), SS304(code:B) SS316(code:R),SS316L(code:L) 04.Applicable temp:carbon steel---normally Va:-29~350℃ specially Ⅲa:-29~150℃,IVa:-29~250℃ stainless steel---normally Vb:-40~350℃ specially Ⅲb:-40~150℃, IVb:-40~250℃, Vc:-40~450℃ 05.Valve disc sealing material: normally metal sealing---hard alloy(code:Y), alloy steel(code:H), body material(code:W) specially soft sealing---PTFE(code:P), PPL(code:P) 06.The medium flow direction must be the same as arrow direction on valve body, can be installed at any angle, to keep it installed horizontally upside is easy for operation