DN1000 GOST standard gate valve is max. size our factory design and manufactured for Russia market. The pressure will be PN16 and PN25. Wedge gate valve material can be low temperature steel, such as LCB, LCC, LC1; carbon steel, such as WCB. The construciton structureof flange gate valve is same as other bolt bonnet gate valve with outside screw and yoke, rising stem, flexible wedge, fullly guided, metal to metal seat overlaying stellite which operated by electric actuator, pneumatic or handwheel. Both flange and BW are avaible for piping connection. .