德国 萨姆森 高压单座调节阀

阀体:      WN 1.0619 , WN1.7357 or WN 1.4581
        A216WCC,  A217WC6 or A351CF8M
阀芯/阀座:     WN 1.4006, WN1.4008 or WN 1.4571
填料:      V-ring packing PTFE with carbon,
Packing spring of stainless steel WN 1.4310
High-temperature packing
波纹管:  WN 1.4571