hartford loop

The Hartford loop is needed to prevent steam pressure in the condensate return line from forcing the liquid condensate (water) out of the boiler and back into the return piping system – something that could be a serious problem resulting in boiler water loss and boiler damage or destruction.

Do all boilers need a Hartford loop?

If the system has a dry return (as most one-pipe steam system do), you still need a Hartford Loop, even though no return piping is below the boiler’s waterline. This is because the near-boiler piping has an equalizer that keeps the water from backing out of the boiler when steam pressure builds.

Why is it called a Hartford loop?

It was called the Hartford Loop after the city central to the insurance industry. A proper Hartford Loop is taken off the equalizing line of the boiler piping with its center 2″ below the normal water line.

What is the Hartford loop in plumbing?

Simply speaking, a Hartford Loop is a configuration of interconnected pipes associated with the gravity condensate return line on a steam boiler, and the point at which that condensation is re-introduced back into the boiler. It exists between the header of the boiler and the gravity return.

What is a Pressuretrol used for?

A pressuretrol is a control used to control a steam boiler, by setting when the boiler should begin and end firing based on steam pressure.

What does a blowdown valve do?

Blowdown valves are commonly used to control the concentration of dissolved solids in the boiler water. The valves are designed and manufactured according to the requirements of the boiler and the industrial application.

On what type of residential heating system will you find a Hartford loop?

A Hartford Loop is an arrangement of piping between a steam boiler’s header and its gravity-return piping.

How many psi should boiler have?

In most cases, it should rise to about 20 psi while its heating element operates. That’s optimal at normal temperatures. Pressure changes of a few psi one way or the other can be brought about by atmospheric conditions. Most boilers are safe up to around 30 psi, at which point seals can begin to fail.

What is a boiler loop?

A boiler filling loop is a hose that can temporarily connect your boiler to your main water supply. It is used to repressurise your boiler and top up the water when you drain or bleed your system. They usually come as an additional attachment with the boiler. When they aren’t, you can easily buy it separately.

What type of boiler operates at 12 to 15 psi?

A – Expansion Tank

Residential boilers are designed to work at a certain pressure (usually 12 to 15 pounds per square inch – psi).

What does a Vaporstat do?

A vaporstat is a very accurate (and more expensive) control that senses ounces of pressure rather than pounds. A vaporstat is the nicest present you can give many smaller steam systems.

What is a modulating pressuretrol?

Modulating pressure operating control for regulation of liquid or air and other non-corrosive gases. Features: Use with steam, air, noncombustible gases, or other fluids non-corrosive to the brass or phos-bronze (300 psi models) bellows.

How do you skim a boiler?

Here’s the proper skimming procedure we used:
Turn the boiler on and run it until it gets hot starts making steam.Turn the boiler off. Only after lifting the relief valve to verify there is no steam pressure in the boiler, find the skim tapping or a plug you can safely remove above the water level.

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