Stainless steel valves can be divided into many categories according to different classification standards. The following are common classification methods and specific types:

1. Classification by structure and working principle
1) Globe Valve
Controls flow by moving the disc up and down, has good sealing, and is suitable for regulating flow or cutting off the medium, but has a large flow resistance.
2) Gate Valve
The valve plate moves vertically, and has a small flow resistance when fully open, which is suitable for fully open/fully closed cutting purposes, but not suitable for regulating flow.
3) Ball Valve
Controls flow by rotating the ball with holes, has fast opening and closing, good sealing, and is suitable for high pressure or fast cutting occasions.
4) Butterfly Valve
The valve plate rotates 90° to control flow, has a compact structure and light weight, and is suitable for large-diameter or low-pressure differential pipelines.
5) Check Valve
One-way flow, prevents medium backflow, and is divided into lift type, swing type, etc.
6) Safety Valve
Automatically releases pressure when overpressure occurs to protect system safety. 7) Control Valve
Used to precisely control parameters such as flow and pressure, often used in conjunction with automation systems.

2. Classification by connection method
Flange-connected valve: connected to the pipeline through a flange, suitable for high pressure and large diameter occasions.
Threaded valve: commonly used for small diameter pipelines, easy to install.
Welded valve: directly welded on the pipeline, with excellent sealing, suitable for high temperature, high pressure or harsh environment.
Clamp-connected valve: easy to disassemble quickly, commonly used in the food and pharmaceutical industries.

3. Classification by drive method
Manual valve: operated by handwheel, handle or lever, low cost, suitable for small or infrequent operation occasions.
Electric valve: driven by a motor, suitable for remote control or automation system.
Pneumatic/hydraulic valve: driven by compressed air or hydraulic pressure, fast response, suitable for explosion-proof environment.
Solenoid valve: uses electromagnetic force to control opening and closing, often used for small flow or automation control.