Stock valves are not actually a specific type of valve. The ‘stock’ part of the name simply refers to the fact that these are kept ‘in stock’ by suppliers. These valves tend to be those that can be used for a number of general purposes.
What are the most common types?
As mentioned above, the types of valves that are likely to be kept in stock tend to be more generic rather than customised. These include ball valves, gate valves, globe valves and check/non-return valves.
Ball Valves
Ball valves are one of the most frequently used valve types. They use a perforated ball to stop and start the flow. They are suitable for use with gases or liquids and are usually made from brass or stainless steel.
Ball valves are popular in numerous industries including chemical, food and drink, oil and gas, manufacturing and petrochemical. The main advantages of ball valves are their durability, ease of use, flexibility, low maintenance and suitability for high-pressure conditions.
Gate valves
Gate valves are linear motion valves that are able to stop or allow flow using a gate-like closure element. These are commonly used in water supply systems, as well as in power plants, mining and marine. These tend to be made from cast iron, stainless steel or brass. They are bidirectional, simple to use and durable.
Globe Valves
Globe valves are also linear motion valves, but they have a disc as the closure element. These valves offer good sealing and throttling capability, have a relatively long lifespan and offer precise control of flow rates. They are found in cooling water systems, fuel oil systems, and various industrial systems (notably drainage).
Industrial Valves
As well as valves for domestic applications, there is also a vast range of industrial valves available. There are a number of specialist suppliers in this field, such as Orseal industrial valves.
Check Valves/Non-Return Valves
This type of valve only allows fluid and gas to flow in one direction. These are used in settings where it is critical to prevent backflow. They are used in both industrial and domestic systems.
