Hot Tip #18 – One More Degree

Frequently when I’m talking to laundry operators or their engineers, I ask them what it would be worth to them if they could recover one more degree with their wastewater heat recovery system. The most common response is “Gee, I don’t know”. When encouraged to make a guess, their response is something like “I bet […]

Hot Tip #17 – Ironer Folder Drops

Ironer Folder Drops

Hot Tip #16 – Air Leaks

While visiting laundries one issue frequently arises, how to handle compressed air leaks. Most leaks that I find are very difficult to correct. The easy ones are generally corrected by facility maintenance long before I arrive. The easy ones are those that you find in the air delivery plumbing. Examples include:  leaking quick disconnects, a […]

Hot Tip #15 – Condensate Return Lines

All condensate lines should be pitched down 1/4″ per 10 feet (5 mm/m) to allow for drainage of the condensate by gravity. The most efficient return systems are, by design, not completely full of liquid and are not vented to the atmosphere. They are referred to as dry-closed systems. They handle condensate at steam temperature […]

Hot Tip #14 – Pipe Sizing Factors

When determining pipe size for steam systems, the following factors should be considered. Initial steam pressure: the output pressure at the boiler or the main for branch piping. Allowable pressure drop: the total pressure drop allowed from the source to the end of the line. This includes all drops from line loss, elbows, valves, etc. […]

Hot Tip #13 – Steam Traps

“Drain each drip point with a separate trap.” This rule for trapping should never be broken under any circumstances. Short-circuiting occurs when the condensate outlets from two heat exchange units are connected. Short-circuiting is likely whenever the drip points of two heat exchangers are drained with one trap, even if the two units appear to […]

Hot Tip #12 – Mud Legs

Dirt pockets, (mud legs) provide a low-flow area where dirt and scale can settle out of the steam and condensate stream. Dirt pockets must be cleaned out periodically and, therefore, should be part of a regularly scheduled maintenance program. Some traps are more susceptible to dirt than others. Strainers should be installed before any trap […]

Hot Tip #11 – Steam Trap Installation

Unions provide a simple means for removing traps from a system for repair or replacement. If one union is used, locate it downstream from the trap. A trap can be removed between the union and the next connection point upstream (shutoff valve, strainer, or drip leg). If two unions are used, place them either at […]

Hot Tip #10 – Steam Trap Repair

Every year, hundreds of millions of dollars worth of steam is wasted in the U.S. Much of this loss is at the expense of companies that have made a huge investment in energy management – only to fail to establish a program to maintain steam trap efficiency. For $40.00, (less than the cost of one […]

Hot Tip #9 – Latent heat of evaporation

One pound of water at 32 degrees F. plus 180 BTU’s = One pound of water at 212 degrees F.  One pound of water at 212 degrees F. plus 971 BTU’s = One pound of steam at 212 degrees F. and at 0 PSIG.                                                                                                                                                                             One pound of steam at 212 degrees F. and at 0 […]