Valve Replacement Services ensure your systems operate efficiently by promptly addressing faulty pipework valves. In Farringdon, London, a client faced malfunctioning boiler valves that couldn’t close properly. Our team utilised Liquid Nitrogen Pipe Freezing method to isolate the affected sections, allowing for the seamless replacement of two DRV valves and one butterfly valve. This approach minimised disruption and restored optimal boiler functionality. Learn more about this project:
Client – QuanTec HVAC Solutions
Site Location – Nexus Building, Farringdon, London
Contract Duration – One day, Out of hours (Saturday)
Failing DRV and Butterfly Valves
The Brief
The client wanted to carry out repairs to their boiler however, the current valves connected to the boiler were failing as they were unable to close. Therefore, the client required pipe freezing services to isolate the pipework and replace the broken valves. Then it would be possible for the boiler maintenance works to take place.
Summary of Services Supplied
To isolate the area with our pipe freezing services and replace the failing two DRV Valves and one Butterfly Valve.
Key Highlights of Services Included
Our engineers attended the site out of hours to carry out the following works:
Part 1
- On the LTHW flow pipework we applied two 100mm liquid nitrogen freezes above the boiler. Once the freezes had taken hold, it was now safe to replace the valves.
- Our team then stripped out and replaced the existing 100mm DRV Valve and 100mm Butterfly Valve.
- Lastly, we allowed the freezes to thaw, and our engineers checked for any possible leaks.
Part 2
- On the main LTHW return, we froze a 150mm pipe with liquid nitrogen to stop the flow instantly.
- Our Valve Replacement Services team swiftly removed and replaced the faulty 150mm DRV Valve, ensuring a seamless installation with no unnecessary delays.
- We safely released the freeze plugs and thoroughly checked for leaks to guarantee a secure, fully operational system.
- After completing the work, we cleared all redundant items and disposed of them at a licensed recycling facility.
Result of Works
The client gained fully functional DRV and Butterfly Valves with minimal service disruption. The new valves ensured safe boiler maintenance access.
Benefits of using Pipe Freezing to change pipework valves
Pipe freezing involves applying liquid nitrogen to a pipe section, creating a solid freeze plug that halts fluid flow. This method enables maintenance or valve replacements services without draining the entire system. Once the freeze plug has taken hold, engineers can safely remove and replace faulty valves. After completing the work, the freeze plug is thawed, restoring normal operations without significant downtime. If you would like to learn more, please read our Guide to Pipe Freezing.
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