JIS Cast Steel Gate Valve 

Gate valve, is a valve that opens by lifting a round or rectangular gate/wedge out of the path of the fluid. The distinct feature of a gate valve is the sealing surfaces between the gate and seats are planar, so gate valves are often used when a straight-line flow of fluid and minimum restriction is asked. 
Gate valves are characterized as having either a rising or a non-rising stem. Rising stems provide a visual indication of valve position because the stem is attached to the gate such that the gate and stem rise and lower together as the valve is operated. 
Non-rising stem valves may have a pointer threaded onto the upper end of the stem to indicate valveposition. Non-rising stems are used underground or where vertical space is limited.

A). Design&Manufacture: JIS B2073B B2083
B). Face to Face: JIS B2002
C). Flange End: JIS B2212 B2214
D). Test: JIS B2003
2). Sizes: 1/2" - 24" or 12mm - 600mm
3). Pressure Rating: 10K, 20K
4). Material: Stainless steel, cast steel
5). Operated by: Handwheel, Gear, Pneumatic, hydraulic and Electric actuator.