9. Knife Gate Valve: ( Types of Valves )

These are referred to as those valves which are used for controlling the flow of media which containing solids, the knife gate valve features a quite thin gate which is controlled through the linear action that cuts through the materials and creates a seal. These valves are not that much suited for high-pressure implementations while these valves are considered ideal for the use with grease, oils, paper pulp, slurry and wastewater which might obstruct the operations of the other valve types.

10. Globe Valve: ( Types of Valves )

Globe valves are referred to as those valves which are typically applied in modulating control operations. These are available in three body types T-body, Y-Pattern, and angle body.

11. Needle Valve: ( Types of Valves )

Needle valves are mostly used in the small diameter piping systems where fine and accurate flow control is needed. The needle valves got its name from the point on a conical disc which is used within it.

12. Pinch Valve: ( Types of Valves )

Pinch Valve : These valves are mostly used for handling solid materials, slurries and liquids with suspended solids. These valves are found using a linear motion and also feature an internal sleeve to isolate the media.

Common Functional Designation And Design Types

Isolation Valves:– Ball Valve, Butterfly Valve, Diaphragm Valve, gate Valve, Pinch Valve, piston and plug valves
Regulatory Valves:– Ball Valve, Butterfly Valve, Diaphragm Valve, Globe Valve, Needle Valve, Pinch Valve and Plug Valves
Safety Relief Valves:– Designed as pressure releasing and vacuum relief valves
Non-Returnable Valves:– Swing check and lift check valves
Special Purpose Valves:– Mostly featured as multi-port, float valve, foot, knife gate valve and line blind valves

Sizing Of Valves

Valves might be a very small part of any piping process or system with respect to space which is often a substantial portion of the design and build budget. It is found that they have a quite vital impact at the long-term costs and also on the overall performance of the system. Selecting a correct valve size is quite essential in both optimizing costs which ensures safety, accuracy and reliability in operations. The first and the foremost thing which is kept in consideration is the overall size of the valve, in terms of physical dimensions and also in terms of the internal size and flow rates.

Selecting a valve which does not fit in properly in required space can result in additional costs. Choosing a valve that does not provide the ideal flow rate can lead to an inaccurate flow which at least controls the complete system failure. In case the valve is too small, it can cause a reduced downstream flow by creating a back-pressure upstream. In case the valve is too large it can control the flow which can be reduced drastically and further can move from fully opened or fully closed.

While selecting an accurate size, one must consider both the connector diameters accompanied with the overall flow rate of the valve which should be compared according to your needs. There are some valves which offer an excellent flow whereas the others constrict flow and increase the pressure which means that sometimes you should install a larger valve in order to adjust the flow than the adapter diameter alone might imply.