1、 Before use, the pipeline and the overflow part of the valve body shall be cleaned with water to prevent residual iron chips and other sundries from entering the inner cavity of the valve body.

1. Failure of on-site water supply regulating valve: valve 1 vibrates and beeps, which is manifested in that the actuator vibrates when the sensitivity is adjusted too high; The pressure changes too much, and the actuator thrust is insufficient; The control valve is too large, and the valve often works at a small opening; The valve element and bushing are severely worn. Valve 2 is sluggish, which is shown by blockage; The packing is aging and pressed too tightly. 3 The leakage is large, and the valve core or valve seat is corroded and worn; The valve seat is loose or the thread is corroded; There are foreign matters on the valve seat and valve core. 4 The packing and the connection of the upper and lower valve covers leak, which is shown by the packing gland not being pressed tightly; The valve rod is damaged; The fastening nut is loose; The gasket is damaged.