GOST เหล็ก 5762 นำแสดงยืดหยุ่นนั่งประตูวาล์วก๊าซน้ำน้ำมัน GOST 3706-93

GOST 5762 Cast Steel Resilient Seated Gate Valve for Water Gas Oil GOST 3706-93 Descrition: Gate valves normally have flanged ends which are drilled according to pipeline compatible flange dimensional standards. Gate valves are typically constructed from cast iron, ductile iron, cast carbon steel, gun metal, stainless steel, alloy steels, and forged steels. Gate valves are characterised as having either a rising or a nonrising stem. Rising stems provide a visual indication of