How to choose the right stock valves

Stock valves are not actually a type of valve. The ‘stock’ actually refers to the fact that they tend to be kept ‘in stock’. They are usually valves that can be used for more generic purposes – as opposed to being bespoke or made for specific applications. So, what types of valves tend to be in stock?

The different types of valves that are usually kept in stock and are also the most popular include gate valves, ball valves, globe valves, and check/non-return valves.

Gate Valves

Gate valves are a type of linear-motion valve. They utilise a gate-like closure element. When the gate is lowered, it blocks the flow. When raised, it allows flow. These are usually operated by a handwheel, T-key or actuator, and are bidirectional, durable and easy to use. Gate valves tend to be made from stainless steel, cast iron or brass.

Gate valves are found in water-supply systems and power plants, as well as in mining and marine applications

Ball Valves

Ball valves are one of the most commonly used types. They use a perforated spherical orb (the ‘ball’) to stop and start the flow. They can be used with gases or liquids.

Ball valves are usually made from brass or stainless steel and are used in numerous industries including oil and gas, manufacturing, petrochemicals, and food and drink. They are suitable for high-pressure applications and are durable and flexible.

Industrial Valves

Industrial valves are those used in industry rather than domestically. They tend to be robust and can deal with the elements. There are a number of manufacturers who specialise in these, such as https://orseal.com/.

Globe Valves

Globe valves are also linear-motion valves. They use a disc rather than a gate as the closure element. Globe valves are often found within cooling water systems, drainage systems or fuel oil systems. These valves offer precise control of flow rates and good sealing capability.

Check Valves/Non-Return Valves

Check/non-return valves (as their name suggests) only allow a one-directional flow. These are used in applications where it is crucial to prevent backflow.