Steam Boiler Controls
This pressure-trol safety features a mechanical reset, and shuts down the steam boiler in the event that it reaches or exceeds the setpoint (as set on this safety).
What is a high-limit safety.
These are necessary in steam boiler piping systems in order to prevent stress on the piping when it heats up or cools down.
These traps operate based off of temperature only, and are common in smaller residential applications.
This device is used to drop steam pressure for use at terminal equipment, heat exchangers, etc.
What is a pressure reducing valve.
What are two symptoms of a failed steam trap?
Steam blowby out of trap, cold piping/steam coil, other?
This is the pressure at which steam becomes classified as high pressure.
Above 15psi.
This pressure-trol device functions to start and stop the boiler based on pressure.
What is the operating control.
This piping arrangement prevents a steam boiler from low water events should a leak occur in the condensate return piping.
What is a hartford loop.
These traps are best suited in situations where there is a heavy varying load, typically at point of use on low pressure equipment such as heat exchangers and terminal units.
What is a float and thermostatic trap.
This component is used to separate the boiler sightglass from the body of the boiler so that an accurate water reading can be taken.
What is a water column.
You take a service call for a air handler with a steam coil is failing to warm up. You verify that the control valve is operating properly, and you have pressure at the inlet of the coil. What is most likely the issue in this situation.
Failed steam trap/ Coil is full of condensate.
970 btus.
What is a feedwater regulator.
This dimension is required to overcome boiler pressure and feed condensate back into the boiler on systems or mains where control valves are used.
What is the B dimension.
These traps are more resilient to high pressure applications, but may require priming for proper operation.
What is a inverted bucket trap.
This component consists of a tank, an air vent, float controls, and two pumps. It works to pump condensate back to the steam boiler.
What is a condensate receiver with duplex pumps, or duplex pump system.
You take a service call for a residential one pipe counterflow system. The customer complains that when the boiler fires up, only the terminal units on the first floor get warm. The second floor terminal units remain cool. What is most likely the cause?
Failed main vent.
This is the amount of BTU/hr per boiler horsepower.
What is 33,400 BTU/hr.
This component is typically placed at the outlet of each steam boiler where multiple boilers are present. It works as a form of isolation and check valve so that a boiler may not become pressurized from other operating boilers.
What is a stop/check or an angle/check.
This piping arrangement prevents the pressure in the boiler from pushing condensate back out the return by creating a balance between the boiler outlet and the condensate return.
Least: Temperature
What is a deaerator.
You take a service call on a steam boiler system that has a boiler feedwater system. You find that the boiler has tripped out on low water. You Note that the boiler pump is operating, and the boiler feedwater valve is opening and closing as it should. What component failure could cause this?
City makeup water float.
One unit of water expands this many times as it is boiled into steam.
Roughly 1700-1800 times.
This pressure-trol works to change the firing rate of the boiler while it is operating based on pressure.
What is the modulating control.
What is a 2 pipe gravity return system.
This is the typical arrangement of fittings for a steam trap on a drip leg that will need to lift condensate to a return line above.
Valve, Union, Strainer, Trap, Test Tee, Check Valve, Union, Isolation Valve.
You take a service call for a complaint that a condensate receiver that is being fed from a nearby domestic hot water/steam heat exchanger is flooding everytime the control valve opens for the first time in the morning. You verify that you have good steam pressure, and that the steam trap is operating properly. What is most likely the cause in this situation?
Failed vaccuum breaker causing condensate to remain in the heat exchanger when the control valve closes. Large amount of condensate is then pushed out of the heat exchanger when the vaccum is broken by steam.
This is the reccomended pressure for a gravity return condensate system.
What is 2psi.