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Never. Throttling will erode the valve seat and then the valve will never shut off completely.
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∙ 13y ago
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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 a sluice used for?
A sluice valve is a gate valve. The terminology 'sluice valve' is usually applied when the gate valve is used in an open channel, like in a dam gate. It can be thought of as a flat plate that can be lowered into or lifted out of the flow channel. Of course, the actual designs are more sophisticated than that.
Why is it called a butterfly valve?
Because the inner area where the fluid moves has a gate which is shaped like a butterfliys wings. Passing through the centre of this gate is a rod which ends outside the valve where the handle is attached. When the gate is open it allows flow, when closed the gate seals off the valve stopping flow or if require can be partially turned to restrict flow
Disadvantages of butterfly valve?
The use of butterfly valves for control applications is limited to the valve opening range between 30 degrees to 70 degrees. Throttling using butterfly valves is limited to low pressure drop applications. Potential cavitation is a concern when butterfly valves are used. Also possibility of a choked flow is a concern.
Explain why throttling is a wasteful process and how the turbine can be used to reduce steam pressure for process work?
a turbine would equally reduce the pressure and gain output work whilst mere throttling would not be of any benefit
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 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
What type of valve is used in a peanut butter factory ball or gate or globe or gate?
gate valve. globes are used for throttling and have far too many turns. ball valves are not made for thick stuff. this question was on the inter-provincal exam they had globe valve, gate valve, diaphragm valve and piston valve. for answers too choose from.
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
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 difference between a globe valve and a butterfly valve in terms of application?
Globe is used for throttling
Can a globe valve be uses as a blowdown valve?
HECK NO READ the ASME code or the NBBI Also read up on valves and what they are designed to do. A "Globe" valve is used for THROTTLING and severely restricts flow Personally I like using a GATE valve in combination with a ball valve for Blow down applications
Why the energy losses in globe valve due to the fully open valve is greater than losses of gate valve?
Globe valves have a more complex flow path, involving multiple changes in direction, which results in higher energy losses when fully open compared to gate valves that have a straight-through flow path. This increased resistance in globe valves leads to higher pressure drop and energy losses in the system.
What valve types are used for throttling flow?
Ball-joint shut off
What is the difference between a knife gate valve a gate valve?
A Knife Gate Valve is used to slice through sludge /sewerage and a gate is used fro normal positive shut off If you want to find the photo of Knife Gate Valve,you can enter to the link:http://www.kolinkcn.com/
How do you calculate torque of a gate valve?
how to calculate gate valve torgue. What is the torgue required for 1100NB gate vave used for 3kg/cm2 steam line
What are Disadvantage of diode valve?
the disadvantages are that over a period of time gate valves seize and become in operable. also the handles of gate valves corrode quickly and gate valves don't entirely close properly making it difficult to solder. Gate valves are used for positive shut off and Gate valves are not designed for throttling like a globe pattern type . Gate valve fail because the installer has no idea what these types of valves are intended to do such as main steam shut off's or water mains..If properly used and installed correctly these valves last over 100 years under extream conditions
