What is Trip-Throttle Valve? How does Trip-Throttle Valve works?
WEBSep 18, 2019 · those where the valve plug is pulled onto a seat by the closing force. Because of the dual functions required of the valve-the tripping action and the throttling action-the stem must be in two pieces in both designs. The stem of the valve’s steam shut-off part is not rotating ; it only slides to accomplish the necessary tripping action.
What are the Types of control Valves? - AutomationForum
WEBMay 3, 2018 · Plug Type control Valve. The closure member of a plug valve is a cylindrical or tapered cylindrical shaped plug with a flow port. Like a ball valve, a plug valve allows straight-through flow in the open position and shuts off flow when the ball is rotated 90 degrees. Like ball valves, plug valves are found mostly in flow shut-off applications.
What is a butterfly valve and what is it used for
WEBApr 11, 2020 · Butterfly valves are valves that can be used for regulating, isolating, stopping, or starting the fluid flow. These valves are mostly used as control valves in applications where the pressure drops required of the valves are relatively low. These valves can be used as either shutoff valves or as throttling valves.
What is a globe valve and what is it used for - AutomationForum
WEBApr 3, 2020 · Globe valves are linear motion valves and they can be used to start-stop and regulate the fluid flow. Globe valves are mostly used for throttling service and for automatic control. A small movement of the stem is required from the fully closed to the fully open position, with the help of a diaphragm operator the globe valves are easy to automate.
What is a needle valve and what is the purpose of needle valves
WEBApr 1, 2020 · The needle valves are capable to control the pressure and flow. Needle valves are linear motion valves, these valves are used in instrument systems for throttling of small volumes. Needle valves have metal to metal seats, but because of the small size, they can be used for positive shut off. These valves are capable to control the volume, the ...
What is a float valve and how does it work - AutomationForum
WEBJun 6, 2020 · A float is used to mechanically operate this valve. These valves are liquid level control valves and they are mostly used in the industrial refrigeration system. In a large refrigeration system, the float valves are used as a throttling device. Float valves are actuated lever valves that are designed to control the level of the liquids.
What is a piston valve and how does it work - AutomationForum
WEBApr 25, 2020 · piston valve is a device designed to regulate the flow of fluid or gas through a pipe by utilizing the linear movement of a piston within a chamber or cylinder. Common examples of piston valves include: Valves in brass musical instruments. Valves in pneumatic cannons. Valves in stationary steam engines and steam locomotives.
What are motor operated valves? | Instrumentation and Control …
WEBMar 10, 2018 · Introduction. The motor operated valves (MOV) is an important element of the plant and pipe system. These valves are generally large and are used for different applications such as pump discharge, etc. The control valves operated by motor are often called on / off valves since the motors serve to open or …
Isolation valve Need, Types and Configuration - AutomationForum
WEBMar 28, 2023 · Diaphragm isolation valves are acclaimed as membrane valves. It is a solenoid-operated device that seals the valve seat and isolates the flow path by extending and retracting a diaphragm. Diaphragm isolation valves, like rocker-style valves, can be configured as simple on/off 2-way or 3-way devices. The diaphragm of a diaphragm isolation valve ...
Basics of Pinch valves | Instrumentation and Control Engineering
WEBMar 7, 2018 · Basics of Pinch valves. A pinch valve is a simplest valve design. It is a linear motion valve that is used to start, regulate and stop fluid flow. It uses a rubber tube (pinch tube) to control the fluid. Pinch valves are ideally suited for the handling of slurries, liquids with large amounts of suspended solids, and systems that convey solids ...
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