Yes, If it is a pressurized system, the water from the back boiler and your oil or gas fired boiler can be mixed. This can also be achieved by using a water to water plate exchanger to preheat the return water from your heating devices. If you have a forced air heating system in the house, a coil can be placed in the main trunk line of the duct work and heated by circulated water from the back boiler.
What you meant by this question is uncertain. If you are asking about the definition then Boiler steam pressure is the pressure developed by a water steam boiler, else if you are asking about the Rated boiler steam pressure then it is the safe operating pressure a boiler can operate, else if you are asking about Maximum boiler steam pressure then it is the maximum pressure that a boiler can produce with out failure.
A low pressure boiler is any boiler 15 psi or lower
Boiler is basically a pressure vessel in which this boiler aims to heat the surroundings which is a pressure vessel.
advanatages of high pressure boilers
500 MW Boiler is sub-critical Boiler which generates steam at pressure lower than the critical pressure ie below 221.2 kg/sqcm. where as the 660 MW boiler is super critical boiler which operates steam pressure above critical pressure.
lamont boiler is high pressure boiler & it'swork on high pressure at constant temprature
a designed pressure in a boiler is a little man who lives inside the boiler continually watching animated porn.
Boiler have minimum pressure 28 bar as per. Indian boiler act.so p c xan not call a boiler
I believe that is 15 PSI on a low pressure steam boiler
Raise the pressure in the boiler until the valve relieves and note the pressure at which it does so.
Due to pascals law
A high pressure steam boiler is boiler in which steam is generated at pressure exceeding 15 psig and operates hot water boiler above 160 psig or 250o F. Application this type usually is used for utility plants, big industrial plants and process application. A high pressure steam boiler can be named as Power Boiler, in which design and construction rule following to rules of ASME Boiler and Pressure Vessel Code Section I - Power Boiler.