To aid your memory a handy cheatsheet of valves types and applications:
| Valve Type | Notes |
| Globe Valve | – Commonly used for control purposes – Typically used for high pressure clean fluids – Pressure drop when open – high head loss valve – Tight shut-off |
| Needle Valve | – Commonly used for precise control purposes – For clean fluids with low flows – Fine control in small diameter piping – High pressure drop when open – Thight shut-off |
| Ball Valve | – Generally, not suitable for regulating flow (some exceptions) – Generally used with gas, liquids and slurriesLow pressure drop when open – Tight shut-off |
| Butterfly Valve | – Suitable for control purposes – Low pressure drop when open – Large diameters and low pressure – Not suitable for tight shut-off |
| Gate Valve | – Not suitable for regulating flow – on/off – Low pressure drop when open – Tight shut-off |
| Diaphragm Valve | – Suitable for small range throttling control and on/offLow pressure drop when open – Used when fluids are corrosive and with slurries – Tight shut-off |
| Plug Valve | – Suitable for control purposesHigh pressure drop when open – high head loss valve – Quick opening – Tight shut-off |
| None-return Valve | – Single direction flow – Self-closingLow pressure drop when open |
| Pressure Relief Valve | – Opens at set pressure level |