What does a pressuretrol do?

The pressuretrol tells the boiler when there’s enough steam in the system and it can shut down. The pressuretrol works by keeping the pressure in the steam pipes within a certain range. When the device detects that the pressure exceeds some threshold, it turns off the boiler.

What does a VaporStat do?

The L408J VaporStat® Controllers are line voltage pressure controllers that provide operating control or automatic limit protection for pressure systems of up to 4 psi (27.6 kPa). All models have Microswitch™ snap switches to open or close a circuit on a pressure rise.

What is the operating pressure of a steam boiler?

Steam Heating Boilers Operating Pressure Settings Residential steam heating systems are almost always designed to operate at very low pressures, typically around 0.2 psi to a maximum of 0.5 psi – that’ s 1/2 of one psi.

What should my pressuretrol be set at?

Set the vaporstat to “Cut In” at about 4 ounces and “Cut Out” at about 10 ounces after making sure that all the air vents are the right size, in the right places and working properly. A few ounces will be all that you need. And that’s how you set a pressuretrol. Pretty easy, right?

Why is the pigtail so important to a pressuretrol?

Pigtails A pigtail is a short, curved, and very appropriately named, piece of pipe that sits under a gauge or a pressuretrol. It’s first job is to fill with water and keep the latent heat of steam from reaching through to the gauge or the pressuretrol. This increases the lifespan of whatever the pigtail is serving.

What should my Pressuretrol be set at?

What should a Pressuretrol be set at?

How do you set pressuretrol?

The “main” scale on a subtractive pressuretrol is your cut-out pressure. Set that scale at 1 1/2 psig. To get to “Cut In” you have to subtract the “differential” from the “main.” So set the differential for 1 psig. This will cycle the system between 1/2 psig and 1 1/2 psig as long as the thermostat is calling.

What is the purpose of using pigtail tube when connecting a tube to a steam line?

The pigtail buffers the instrument from the damaging effects of high temperature steam by holding system fluid in the coil to provide a steam trap for the fluid to condensate and dissipate the heat. Pigtail siphons also reduce the effect of rapid pressure surges.

Why do you need a pigtail on a steam boiler?

Pigtails A pigtail is a short, curved, and very appropriately named, piece of pipe that sits under a gauge or a pressuretrol. It has two jobs. It’s first job is to fill with water and keep the latent heat of steam from reaching through to the gauge or the pressuretrol.

Which is better a vaporstat or A pressuretrol?

If you have a vaporstat, consider yourself lucky. 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 the purpose of A pressuretrol in a boiler?

Purpose of a pressuretrol The pressuretrol starts and shutdown the boiler according to adjusted pressure it also controls its operating range. For example, an average operating range of a steam boiler may be 240 to 250 psi. When the steam pressure in the boiler drops 10 psi, the boiler will start up automatically.

What’s the best way to set A pressuretrol?

Set the vaporstat to “Cut In” at about 4 ounces and “Cut Out” at about 10 ounces after making sure that all the air vents are the right size, in the right places and working properly. A few ounces will be all that you need. And that’s how you set a pressuretrol.

What’s the difference between on and off pressuretrol?

The difference between on off pressuretrol and modulating pressuretrol is that it controls the high and low firing of the boiler. High fire is the maximum amount of fuel burned and low firing the A boiler should always start off in low fire and shut off in low fire. It should always be firing for longer periods than it is off.