To increase the pressure must take into account the thermal expansion factor (expansion of heat) from the body, kitchen wall and other parts – the boiler so as not to cause further danger due to forced expansion. Suddenly increasing the pressure will cause a danger of leakage or cracking in the flint pair. In well-known calderas, the standard time to increase boiler pressure is as listed in the chart below:
When boiler pressure rises slowly, things that need to be done are as follows:
When steam starts to occur, each steam shell must be operated to keep the handles of each shell moving freely even though there is thermal expansion.
For new boilers, if the pressure reaches 2-10 kg / cm2 each connection with the nut on the manhole cover, glass estimator, exhaust shells, pressure meter, and other equipment must be tightened again and check its function.
If it has reached normal working pressure, its safety valve must be tried by lifting the handle to ensure that the safety shell can work properly.
Warm up the steam pump, so that the steam pump can remain “stand by”, to keep the electric current broken when the boiler is a full operation, the steam pump can be operated immediately.
Check the outside of the kitchen and ducting for possible damage caused by thermal expansion.
Check whether there are conditions that might be abnormal in every part that rotates or moves. Special attention is given to the possibility of overheating the bearing induced draft fan.
Steam distribution at the normal operation time of the kettle.
Every drain valve on a steam pipeline must be opened.
– Be assured that there is no danger of water hammering, or abnormal noise and leakage after opening the main tap.
– The total opening of the main steam shell must suddenly be avoided. What is feared is the possibility of sudden pressure drops and rising water levels that cause carry over.