Air Preheater and Gas/Gas Heater Services

We record “As found" and "As corrected" measurements in specially prepared quality control documents, so you can see the benefits of our services. Condition reports are produced for all heaters, and all documents are submitted for certification by oursite engineers.

You can choose our services as part of a maintenance contract or seasonal outages. Contact us for a quote on the inspection, repair, replacement, or adjustment of your air and gas preheater elements.

Element Supply And Scr Modifications
Power System Services is a leading supplier of replacement elements for regenerative air and gas-gas heaters. Our elements are suitable for both Ljungstrom and Rothemuhle style rotary regenerative gas and air preheaters. Specific baskets designs target operational constraints including Ash content and Selective Catalytic Reduction (SCR) fouling, ensuring that pressure drops do not adversely affect boiler efficiency.

Our SCR units are designed to combat ammonia slip, which can lead to the formation of ammonium bisulphate, and accelerated corrosion of element plates. Our solutions help prevent blockages and surface heating caused by these issues.

Choose from our range of designs, or request a customised basket from our experts. Our standard designs use carbon steel, Corten steel, or enamelled coated steel, and include:

• Fully wrapped basket
• Frame designs for lightweight frames
• End plate sandwich designs

We take comprehensive measurement to ensure your basket is the correct size, permitting easy insertion and removal. This minimises leakage between your basket and division plates/radial walls. We can advise on the most appropriate design to minimise bypass and promote life expectancy.

Our measures include:

• Site survey to measure rotor sector openings and establish correct dimensions
• Standard manufacturing tolerances: +0 -3mm overall plan. +3 -3mm on depth
• Plan dimensions selected on nominal 3 to 5mm of tightest fit

Element coatings using vitreous enamel are of the highest quality available.

Benefits include:

• The highest level of coating
• Easy to clean surface
• Corrosion resistance
• Controlled packing pressure to avoid packing damage
• Wet electrostatic enamelling by porcelain enamelling specialists, Ferro Techniek
• Long lifetime in aggressive environments
• Lowflow resistance
• Resistance to temperature shocks
• High level of Edge Coverage
• Even coating due to the application process

All our baskets are shrink-wrapped for weather proofing, palletised, and secured with metal banding to prevent damage. Each basket is individually itemised so it can be easily tracked.

Our pallets are numbered for shipment identification, and can be specially sized to meet all requirements. Fumigation is also offered, if needed.