difference between needle valve and globe valve
Needle Valve is a valve in the direction of flow as well as a Globe Valve, the difference between the needle valve and globe valve are designed openings and the shape of the plug by opening the needle valve is smaller than the openings of the globe. valve and the outlet of the needle valve has a slender cone with gradually smaller at the end. Of the plug of the Needle Valves has a taper such that the plug is not strong enough to force you to press the plug close to the seat of the body of the valve is pressed, it may cause. plug is damaged or lose its shape. Therefore, manufacturers are designed to plug the needle valve is not in contact with the body of the valve seat, but the gap is negligible. As a result, when we rotate the needle valve all the way down the plug valve is closed completely. (This is different from a globe valve, which can be turned off completely), so the needle valve is installed must have a block valve.
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