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EGR stands for exhaust gas recirculation and refers to the valve which acts as the main emissions control in a car. It helps the car burn fuel efficiently.

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Q: What is the definition of an EGR valve?
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What is the definition of pneumatic valve?

A valve which requires pressurised air to operate (open or close) is known as pneumatic valve. A valve has a valve base through which the media (could be be air, liquid, steam, gas...) flows and a actuator mounted on the base which helps operate the valve. This actuator could be of pneumatic type. (or elctrically operated motorised type)


What is the Pressure drop in glove valve?

You mean GLOBE valve and that would depend on the size of the valve and the maker


Which valve is the preferred valve to use as flow control valve at the pump discharge 8 inch size ball valve can be used for the same application?

I would use a butterfly valve to set the flow and a pitot tube to measure it. Nexus Valve makes a good one and it is price competetive as well.


Is gate valve used for throttling?

Never. Throttling will erode the valve seat and then the valve will never shut off completely.


What is Difference between relief valve and safety valve?

Relief valve always position in the suction line in oreder to relief the extra pressure, while safety valve is always placed at discharge line to release excess pressure.I would take that one step further by stating that a " RELIEF VALVE" is one that is "meant" to be lifted off its seat, as opposed to a "SAFETY RELIEF VALVE" which is not!DIFFERENCE BETWEEN RELIEF VALVE AND SAFETY VALVE:1. Releif valve is applicable in the fluid system.safety valve is applicable in the gaseous system.2.Relief valve opening is directly proportional to the pressure rise.Safety valve opening is will happen at after reaching the setpressure.3.Mode of relif vlave line is again connected to the suction.But in the safety valve is just vent-out there is no connection tosuction.