PVC-NC;NO/DA-EPDM/VITON
PP-NC;NO/DA-EPDM/VITON
CPVC-NC;NO/DA-EPDM/VITON
PVDF-NC;NO/DA-EPDM/VITON
NC(NOMALLY COLSE)-常閉型
NO(NOMALLY OPEN)-常開型
DA(DOUBLE ACTING)-雙動式