Classification of Valves
| Categories of Valves | Application Description |
| Flow regulating valves | For controlling rate of flow. |
| Temperature regulating valves | For controlling fluid temperature in a system. |
| Automatic process control valves | For controlling rate of flow relative to value. |
| Anti vacuum valves | An automatic type of air valve preventing the formation of vacuum in tanks or pipelines. |
| Blow down valves | A valve which is used for cleaning sludge from a boiler. |
| Bulkhead valves | A gate valve. |
| Free ball valves | A valve in which a ball is free to rotate in any direction. |
| Fusible link or fire valves | A fire prevention valve which has a weighted lever hold open by a wire and fusible link which melts at an increase of room temperature. |
| Hydraulic valves | A control valve for water, oil, or hydraulic systems. |
| Jet dispersal valve | A valve incorporating an element by virtue of which the energy within the emitting jet is dissipated. |
| Penstock | A single faced type of valve consisting of an open frame and a door and used in terminal positions only. |
| Plate valves | A gate valve incorporating a sluicing effect. |
| Radiator valves | A valve controlling the flow of water through a radiator. |
| Rotary slide valve | A valve in which a rotation of internal parts regulates flow by opening and closing a series of segmental ports. |
| Rotary valve | A spherical plug valve in which the plug, which rotates through 90o. |
| Solenoid valve | A valve operated by by an electrical solenoid. |
| Spectacle eye valve | A parallel slide valve. |
| Thermostatic mixing valve | A valve which combines temperature. |
| Throttle valve | A non tight closing butterfly valve. |
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