Parker Steam boilers have been designed to provide complete accessibility for internal inspection. Full length cabinet doors on both sides provide internal accessibility to the drum, blowoff lines, burners and boiler tubes. Tube access openings are provided at ends of every tube, permitting internal inspection to be made in a matter of minutes. Special designed plugs, with straight fitted threads and gaskets, are easy to remove under all conditions. The time required for an internal inspection is a fraction of that required for firetube or straight tube boilers.

Flexible tube design eliminates maintenance costs resulting from warping and leaking associated with rigid straight-tube design. Each tube can expand and contract independently on heating and cooling without setting up concentrated metal fatigue points as opposed to straight-tube design, rigidly held between headers and tube sheets. This is why we provide a 25 year guarantee against thermal shock.

Any steam boiler will likely require retubing sooner or later, depending on care and operating conditions. Recognizing this, special design consideration was given to this concern. Parker Steam Boiler Tubing is constructed in several individual sections, each connected to the boiler drum and lower headers by pipe unions. To replace any section of tubing, it is only necessary to undo the union and remove that section of tubing.

It’s possible to temporarily operate the boiler with a tube section completely removed by replacing the unions with pipe caps. All sections of tubing are interchangeable and so low in cost that many owners purchase an extra section of tubing to have on hand to meet any emergency requirement. Furthermore, the tubing sections on most models can be turned over after several years of operation adding many additional years of service.