Domestic production of gate valve manufacturers more, the connection size is mostly not uniform. Mainly divided into the following major categories: to jb/t2203-1999 "gate valve structure Length" as the main general category.
At present, most of the domestic safety valve manufacturers are in accordance with this standard design and production.
Manual Gate Valve Working principle: Turn the hand round, through the handwheel and stem of the thread of the feed, retreat, lift or drop with the valve stem connected to the valve plate, to open and close the role.
According to the shell/Body material classification, Gate valve can be divided into:
Metallic materials valves: such as carbon steel valves, alloy steel valves, stainless steel valves, cast iron valves, titanium valves, Monel valves, copper alloy valves, lead alloy valves.
Metal Valve Body Liner valve: such as lined with plastic valves, fluorine-lined valves, lined with lead valves, lined with plastic valves, lined with enamel valves. Non-metallic materials valves: such as ceramic valves, glass valves, plastic valves.