The T40 manual control valve is only suitable for regulating the flow rate in steam or hot water lines with nominal pressures ≤ 1.6MPa and ≤2.5MPa and medium temperatures t≤200°C and ≤350°C. Press clockwise to rotate the handwheel to close the manual control valve, at this time the valve stem drives the valve disc down, until the contact between the two conical sealing surfaces reaches the tight closing of the pipeline, the manual control valve produced by the factory is suitable for urban central heating or district heating The best energy-saving products, mainly to adjust the flow.