By gate structure
Wedge gate valves: The most common type; subdivided into single-disc, double-disc, and flexible-disc designs. They offer good sealing performance and are suitable for most standard operating conditions.
Parallel gate valves: Feature parallel sealing surfaces on both sides; commonly used in low-pressure, large-diameter piping applications such as gas distribution and water supply/drainage.
By stem design
Rising stem gate valves: The stem rises and falls with the gate and extends outside the valve body, allowing for a visual indication of the valve's opening position; suitable for high-temperature and high-pressure conditions.
Non-rising stem gate valves: The stem moves only within the valve body with no external rising mechanism; the overall height is lower, making them suitable for underground installation or locations with limited space.
By other criteria
By valve body material:Includes metal (carbon steel, stainless steel, cast iron, etc.), non-metal (plastic, ceramic, etc.), and lined gate valves.
By connection method: Includes flanged, threaded (screwed), and welded connections.
By actuation method: Includes manual, electric, pneumatic, and hydraulic gate valves.
By sealing type: Includes metal-to-metal (hard) seal, soft seal, and hard-alloy seal gate valves, each suited to different temperature, pressure, and fluid medium conditions.