The SpiralWeld™ Benefit
Combined Cycle Gas Turbine (CCGT) power plant are a core part of the power generation make up for the UK. SpiralWeld™ has a wealth of experience on CCGT control valve remanufacture and has supported over 60% of the UK CCGT operating installed base with over 100 different component solutions available. Each solution has been developed to address a specific customer need and we are able to draw upon our knowledge and expertise to develop bespoke solutions for your components.
Customer operating data has shown CCGT components that have undergone SpiralWeld™ ReManufacture+ recovery have performed better than standard OEM parts, seeing more than double the starts before any maintenance intervention and extending maintenance intervals to align to standard outage cycles and beyond.
A SpiralWeld™ ReManufactured component will:
- Give you confidence in reliabilty during operation
- Reduce the cost of your replacement parts
- Reduce plant downtime
- Reduce spare inventory
If you have a specific requirement in mind and want to discuss if SpiralWeld™ could be the right solution, then please contact us and the right member of our expert team will get in touch.
SpiralWeld™ Ltd experience within a typical combined cycle gas turbine system
#1 Fuel Gas Preheater Valve
Purpose
Regulate and control gas pressure and flow through fuel gas preheater system.
SpiralWeld™ ReManufacture+ Solutions
Plug: Perforated skirt and control seat upgrade with our advanced cobalt alloy
#2 HP Bypass Valves
Purpose
Maintain and control main line HP steam pressure during start up or a trip event, dumping steam to the condenser.
SpiralWeld™ ReManufacture Solutions
Main plug: control seat, perforated skirt & pilot seat upgrade
Pilot plug: stem recovery with parent materials, control seat upgrade
Fixed seat: Manufacture+ and seat upgrade
New component Manufacture+ available should condition be beyond ReManufacture
#3 IP Bypass Valves
Purpose
Maintain and control IP steam pressure to IP turbine stage
SpiralWeld™ ReManufacture+ Solutions
Main plug: control seat, perforated skirt & pilot seat upgrade with our advanced cobalt alloy
Pilot plug: stem recovery with parent materials, control seat upgrade with our advanced cobalt alloy
Fixed seat: seat upgrade with our advanced cobalt alloy
#4 HP Feed Water Regulator
Purpose
Maintain and control feed water flow into HP side of HRSG and steam header
SpiralWeld™ ReManufacture+ Solutions
Plug & stem: control seat upgrade with our advanced cobalt alloy
Fixed seats: seat upgrade with our advanced cobalt alloy
Drag valve: clean and reconstitute labyrinthine stack plates
New component Manufacture+ available should condition be beyond ReManufacture
#5 IP Feed Water Regulator
Purpose
Maintain and control feed water flow into IP side of HRSG and steam header
SpiralWeld™ ReManufacture+ Solutions
Plug & stem: control seat upgrade with our advanced cobalt alloy
Fixed seats: seat upgrade with our advanced cobalt alloy
Drag valve: clean and reconstitute labyrinthine stack plates
New component Manufacture+ available should condition be beyond ReManufacture
#6 LP Feed Water Regulator
Purpose
Maintain and control feed water flow into LP side of HRSG and steam header
SpiralWeld™ ReManufacture+ Solutions
Plug & stem: control seat upgrade with our advanced cobalt alloy
Fixed seats: seat upgrade with our advanced cobalt alloy
Drag valve: clean and reconstitute labyrinthine stack plates
New component Manufacture+ available should condition be beyond ReManufacture
Other Feed Water Regulator Designs
Purpose
Maintain and control feed water flow into HRSG and steam header
SpiralWeld™ ReManufacture+ Solutions
Plug & stem: control seat upgrade with our advanced cobalt alloy
Fixed seats: seat upgrade with our advanced cobalt alloy
Cage trim: bore surface upgrade with our advanced cobalt alloy
New component Manufacture+ available should condition be beyond ReManufacture
#7 Minimum flow valve (Schroedahl type)
Purpose
Maintain and control feed water pressure at low operating flow during startup
SpiralWeld™ ReManufacture+ Solutions
Control head: bore, lever arm/pin, piston upgrade with our advanced cobalt alloy
Vortex bush: seat upgrade with our advanced cobalt alloy
Vortex plug: washer/bush and seat upgrade with our advanced cobalt alloy
Nozzle: upgrade design with our advanced cobalt alloy
Manufacture+ of all parts featuring upgraded control and operating surfaces providing enhanced service life
#8 33% Feed Water Regulator
Purpose
Provide initial feed water flow into HRSG during start up activites
SpiralWeld™ ReManufacture+ Solutions
Main plug: control seat upgrade with our advanced cobalt alloy
Pilot plug & stem: control seat upgrade with our advanced cobalt alloy
Fixed seats: seat upgrade with our advanced cobalt alloy
New component Manufacture+ available should condition be beyond ReManufacture
#9 100% Feed Water Regulator
Purpose
Maintain and control feed water flow and pressure into HRSG during full load operation
SpiralWeld™ ReManufacture+ Solutions
Main plug: control seat upgrade with our advanced cobalt alloy
Pilot plug & stem: control seat upgrade with our advanced cobalt alloy
Fixed seats: seat upgrade with our advanced cobalt alloy
New component Manufacture+ available should condition be beyond ReManufacture
#10 Condensate Discharge
Purpose
Maintain and control return of condensate from condeser back to feed water system
SpiralWeld™ ReManufacture+ Solutions
Main plug: control seat upgrade with our advanced cobalt alloy
Fixed seats: seat upgrade with our advanced cobalt alloy
New component Manufacture+ available should condition be beyond ReManufacture
