cast iron gate valve 1.size:1/2"~40" 2.pressure class:PN1 ... ~ 425 degree 4.ISO5208,API600 cast iron/electric/resilient/underground gate valve 1) Sizes: 1/2 - 60" (DN15-1500)2) ... 8) Structure type: Rising stem and wedge single disc API Gate Valves Techanical standard: 1)Design and manufacture: API 600, ... 6D, ASME B16.10, DIN 3202, and BS2080 3)End connection standard: AASME B16.11, ASME B1.20.1, ASME ...