Is a design that combines a manual valve with a switch valve intended for convenience or for safety?

2019-06-25View Original

Thread Content

Is a design that combines a manual valve with a switch valve intended for convenience or for safety?

Reply #22019-06-26

It is intended for safety reasons: in the event that the local valves cannot be operated, the personnel in the DCS control room should promptly inform the on-site inspectors so that they can use manual valves to carry out the necessary safety procedures and prevent production accidents.

Reply #32019-06-26

Prevent manual operation in emergency situations. Similar to the emergency stop button

Reply #42019-07-01

This is a requirement stipulated by the standards; as mentioned on the 4th floor, according to the relevant regulations, control valves equipped with handwheels do not necessarily need to have such hand valves

Reply #52019-07-01

From the diagram, it seems more like it is used for sequential control.

Submit a Project

**Looking for Chemical Technology, Equipment & Solutions?** No Registration Required Broader Platform Exposure | Global Chemical Service Provider Connections

Submit Request — Free Consultation

Disclaimer

This is an automated machine translation of the original thread. Some technical terms may have inaccuracies; the original text shall prevail. Click "View Original" at the top right to access the source page, which supports IP-based automatic real-time language translation. Please watch out for contact details and sales inducements to prevent fraud. All content and translations are for reference only, representing solely the poster's personal views. For enquiries, email service@hcbbs.com.

Quick Links