Valves are designed to flow without touching the metal parts moving valve valve seat can be made from materials that several different types for use with fluid all valves butterfly T durable and require low maintenance lot.
Valves, butterfly valves, Butterfly valve is a family of valves called quarter-turn valve (valve to be rotated a quarter of a circle), the “butterfly” valve is a valve that is connected to the circular plate valve stem. When the valve off the tongue, this will turn the valve in the closed position the fluid flow. Completely.
When the valve off the valve to rotate the valve in the closed position the fluid flow. Completely. When the valve opens the valve end will turn the valve a quarter of a circle to open the way Fluid flow with almost no barrier. The valve may be opened gradually to adjust the flow rate. This is different from the butterfly valve valve valve ball valve where the valve is always in the flow channel. Resulting in pressure loss in the flow that the valve will not open in any position.

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