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Insight and innovation
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- Home
- Insight and innovation
- Transmission innovation
- Summer Outlook
- Winter Outlook
- Gas Ten Year Statement (GTYS)
- Gas Future Operability Planning (GFOP)
- The future of gas-fired generation
- Understanding within-day behaviour
- Identifying future drivers of change
- Changing supply patterns
- Future of gas
- Stakeholder resources
Mechanical maintenance
We conduct a full range of mechanical maintenance across the gas pipeline network, using specialist repair techniques that often eliminate the need for expensive valve replacements. We can usually repair valves without decommissioning the pipeline.
Our expertise includes:
- flushing and sealing techniques using existing valve connections
- sealant-vent plug adaption carried out where bling plugs are fitted
- vent-sealant line replacement
- repair and replacement of actuators and extension tubes
- stem-seal leak repairs
- revalidation and pressure testing on site
- ball-valve maintenance or replacement
- gearbox repair and maintenance
- plug-valve maintenance or replacement.
Services
We regularly receive calls regarding faulty ball vales, Our expertise enable us to determine whether there is an issue with the ball valve or the gearbox/actuator operation system.
We have extensive knowledge of the different types of gearboxes. We are able to source replacement parts and seals. We can then return the gearbox or actuators back to full service.
At PMC we have extensive knowledge of the different types of plug valve and gearbox and actuators.
We can repair and replace actuaries and extension tubes. We can bring below ground valves to a easy operational height along with other services such sealant and vent lines above ground, removing the need to enter valve pits.
If the valves can be removed from the service they can be returned to our depot in Ambergate to undertake a full sweep of maintenance: i.e flushing procedure, gearbox maintenance/overall maintenance, if required. New sealant and vent valves can be fitted, along with a full pressure test to National Grid valve test v6 standard.
Sealant and vent plug adaption turns the existing plug (which can be of various sizes) into the nipple with a pressure drill. We can then input grease into the valve thus providing a seal.
The vent line is adapting the plug to fit a valve so we can then vent the cavity proving the seal.
To fix stem seal leak repairs we have invented the lapping tool. For more information on this click here. We also work on the full range of makes and models used across the network.
We use a range of different products and techniques to achieve seals on valves. We know the correct flush product and sealant technique for each different make and model of valve.
We can undertaken replacement of vent and sealant lines on any make or model of valves - ether live or de-pressurised.