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The QTCV-T4 Quiet Trim Control Valve is the ideal solution for aggressive natural gas regulation applications where dirt and higher pressure differential demands a more rugged control valve. The QTCV-T4 Quiet Trim Control Valve represents a breakthrough in rotary control valve technology. The T4 T-Ball™ extends the capability of the T-Ball range by allowing higher pressure drops and even more effective noise attenuation technology.