Automation renovation of water plants, conversion of manual valves to electric actuators

The automation transformation of manual valves in water plants is achieved by introducing electric actuators, intelligent control systems, and supporting equipment to upgrade manually operated valves into devices that can be remotely controlled or automatically adjusted. The following are key renovation points and implementation suggestions:

🔧 1、 Necessity of renovation

1. ‌Improve regulation accuracy‌
   Manual valves rely on manual experience for adjustment, which can lead to flow control deviations; Electric valves can achieve precise closed-loop control of flow and pressure through sensor feedback, reducing errors710.

2. ‌Ensure response speed‌
   Sudden operating conditions (such as sudden changes in pipeline pressure) require rapid intervention, and the response speed of electric valves can reach seconds, far higher than manual operation (minutes), reducing the risk of pipe bursting1012.

3. ‌Reduce labor costs‌
   The distribution of valves in large water plants is scattered, and after automation transformation, they can be remotely operated through the central control room, reducing the investment of inspection and operation personnel79.

⚙️ 2、 Core transformation process

1. ‌Valve selection and replacement‌

• ‌Priority renovation of key pointsNodes that require frequent adjustment, such as the inlet valve of the sedimentation tank and the backwash valve of the filter tank, should be replaced withElectric butterfly valve/regulating valve(For models that support 4-20mA signal input)710.

• ‌Reserve some manual valvesNormally open/normally closed valves (such as isolation valves) or low-risk areas can be manually operated79.

2. ‌Actuators and drive systems‌

• SelectMoisture proof and explosion-proof electric actuatorAdapt to the humid environment of water plants;

• IntegrationTorque protection functionTo prevent valve jamming and equipment damage1013.

3. ‌Control system integration‌

• ByPLC or DCS systemUnified management of valves to achieve linkage with flow meters and pressure sensors (e.g. automatic adjustment of pump valve opening based on pipeline pressure)910.

• SupportRemote monitoring platformReal time display of valve status, fault alarms, and historical operation records410.

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🛠️ 3、 Implementation precautions

1. ‌compatibility design‌
   During the renovation, it is necessary to evaluate the original pipeline's pressure bearing capacity and valve specifications to avoid deformation of the support due to excessive actuator weight or torque13.

2. ‌Fault redundancy mechanism‌
   Key valve additionManual/automatic switching deviceEnsure emergency manual operation in case of power outage or system failure912.

3. ‌Maintenance optimization‌

• AdoptingSlow closing check valveReduce water hammer impact and extend valve life9；

• Regularly calibrate actuator travel and signal feedback to prevent positioning drift1213.

💡 4、 Transformation benefits