Globe Valve is mostly utilized for the purpose of regulating the flow of liquid in a pipeline; it can be programmed to stop the flow of liquid entirely, slow down the stream or set the fluid to move freely. This type of valve is named after its globe-shaped body that is being separated by an internal baffle; the baffle is the device that is being used to control the fluid flow and it contains two parts – the flat plug and the ring shaped seat. Once the plug is properly positioned in the seat, the movement of the fluid is totally constrained nevertheless, the baffle can be manipulated by either opening it or closing it depending on the amount of fluid flow that you want to have.
Understanding the functions of this valve is very fascinating. All of its parts work as one so that it can follow through the directions that its operator executes. This valve can serve a lot of uses and it can last for many years if the owner knows the proper method of how to maintain a Globe Valve. Moreover, knowing the parts of such valve can aid in learning how the flow of liquid moves and circulates around the equipment; its parts are enumerated and explained in the information below.
This part of the valve is noted to contain the main pressure structure and it aids in forming the mass of the valve. The body surrounds the valve’s entire internal parts that will come in contact with the movement of the substance that is being regulated. The bonnet is linked to the body and it stipulates the containment of fluid, gas, or slurry that is being regulated.
This part supplies a leak proof closure towards the body of the valve; the threaded portion of the stem passes through a hole that contains matching threads in the bonnet. The valves may have screw-in, union, or bolted bonnet. The screw-in bonnet gives a durable and pressure tight seal; the union bonnet is ideal for application that demands inspection or cleaning on a regular basis; bolted bonnets can be utilized for larger and higher applications.
Plug or Disk
This part is considered as the closure member of the valve and it is linked to the stem which is screwed up or down to adjust the control. Plugs or disks are categorized in two forms such as the balance and unbalanced type. The balanced type contains holes towards the plugs; it aids in easier shut off mechanism and it can overcome static force. The unbalanced type is solid and it can be maximized for smaller valves that require low pressure drops.
The stem connects the actuator inside the valve and it helps in transmitting the actuation force. It is necessary that the stem is able to withstand a large compression force and it should acquire a substantial amount of strength during valve opening.
The seat offers a stable, consistent and replaceable shut off surface. This part may be installed and screwed in the same area of the body.
This is used for the manual regulation of the valve
Keep in mind that in order to ensure that Globe Valve executes an outstanding performance all the time, all of its parts should be properly installed and it should always be in its proper working order.