焊接柱塞阀
美标柱塞阀 ,国标柱塞阀 ,铸钢柱塞阀
密封环Sealing ring S软钢(增强柔性石墨)S soft steel (flexible graphite) S软钢S soft steel F软钢F Soft steel 填料Packing 增强柔性石墨Fexible graphite 支架Yoke WCB WCB或WC6 阀杆螺母Stem nut 45(ZCuZn25A16Fe3Mn3) 四开环Four piece ring 1Cr13 20Cr1MoVA