What are the interlocks for a steam boiler?

What is a boiler interlock?

An interlock in the boiler’s control system is a programmed or hardwired condition that forces a device to be in a pre-determined or permissive state before the process can continue.

Boiler interlock is not a physical control device. On the contrary, it describes how these systems are connected. This is a wiring arrangement that prevents your boiler from heating your place when it is not needed, for example, if the temperature you set on the thermostat has been reached. If there is no interlock, the boiler will run continuously, and a lot of energy will be wasted.  This explains what is a boiler interlock.

Depending on design pressure, fuel type, either liquid, gas or solid, all steam boiler require interlocks to sequence the operation and to prevent damage to the boiler. Examples of such devices are High or Low Boiler Drum Water Level, Low Boiler Feed Pump Pressure, High or Low Fuel pressure, High or Low Atomization pressure (oil fired), Proof of Ignition, Proof of Flame, FD and/or ID (solid fuel) Fan Motor Operation or combustion air pressure, Damper or Valve position and High Boiler Steam Pressure as well as O2 and furnace temperature.

The above is the answer to what is a boiler interlock, please contact our specilist to get more information and price list of the boiler parts.