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Throttling in a valve refers to the deliberate reduction of fluid flow through the valve, which can control the rate of flow and pressure in a system. This is achieved by partially closing the valve, creating a restriction that increases resistance and lowers flow. Throttling is often used in applications such as heating and cooling systems, where precise control over fluid movement is necessary. It is important to manage throttling carefully, as excessive throttling can lead to energy loss and increased wear on the valve components.
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What valve types are used for throttling flow?
Ball-joint shut off
Is it okay to put a throttling valve on the inlet pipe of a pump?
No, it is not. It may cause cavitation.
What valves preffered in the upstream and downstream of a control valve ball valve or globe valve?
That would depend on the application such as high steam pressure and if throttling is needed
What is the effect of steam turbine control valve throttling in turbine efficiency?
In Boiler follow turbine mode , Boiler produces a constant pressure behind throttling valve and throttling valve adjusts necessary pressure and required steam as High Pressure steam for entering the turbine . In Valves Wide Open (VWO) mode the efficiency is maximum and we haven't any loss. (It's nearly 106% Turbine MCR) . In Turbine MCR , we have a little loss and consequently a little bit worse heat rate . In partial load , loss is more and efficiency worse.
Why is the throttling valve not replaced by an isentropic turbine in the ideal vapor-compression refrigeration cycle?
In an ideal vapor-compression refrigeration cycle, the throttling valve is used to reduce the pressure of the refrigerant, allowing it to expand and cool without doing work. Replacing it with an isentropic turbine would introduce additional complexity and cost, as the turbine would need to extract work from the refrigerant during expansion. This would alter the cycle's efficiency and require a more complex control system, deviating from the simplicity and effectiveness of the refrigeration cycle that relies on the throttling process to achieve the desired cooling effect. Thus, the throttling valve effectively maintains the cycle's simplicity while achieving the necessary pressure drop.
Is gate valve used for throttling?
Never. Throttling will erode the valve seat and then the valve will never shut off completely.
What valve is the preferred valve to use in throttling a gate valve or globe valve?
Never ever use a Gate type of valve for throttling ONLY a globe pattern is designed for this purpose and a needle valve
How does the throttling valve affect the thermodynamics of a system?
The throttling valve affects the thermodynamics of a system by controlling the flow of a fluid, which can change its pressure and temperature. When the fluid passes through the throttling valve, it expands and cools down, leading to a decrease in pressure and temperature. This process is known as throttling, and it can impact the overall efficiency and performance of the system.
Why is a throttling valve called an expansion valve?
It is not.. A globe , needle , ball valve are used for throttling For expansion either a shock absorber , diaphragm tank or air chamber are used to allow for expansion
What is the function of gate valve?
A gate valve is positive shut off and used for on of off . A globe valve is for throttling
What is the difference between a globe valve and a butterfly valve in terms of application?
Globe is used for throttling
What valve types are used for throttling flow?
Ball-joint shut off
Is pressure after throttling is more or less?
You cannot increase steam pressure through a valve without adding heat to it. Throttling steam always reduces its pressure.
Is it okay to put a throttling valve on the inlet pipe of a pump?
No, it is not. It may cause cavitation.
What valves preffered in the upstream and downstream of a control valve ball valve or globe valve?
That would depend on the application such as high steam pressure and if throttling is needed
What is the difference between reflux valve and check valve?
A check valve allows for flow in one direction and a gate valve is used for positive shut off and a globe valve is used for throttling
When flushing the toilet the water pipe rattles for 10 second before it stops?
The fill valve needs to be repaired or replaced OR try throttling down on the globe valve
