Through the analysis and comparison of water pressure chart of press boiler and no-press boiler, it is found that their main difference is circulating pump delivery, namely different consumption.

• 通过对无压锅炉与有压锅炉供热系统水压图的分析和比较,发现二者的主要区别在于循环水泵的扬程不同,即循环能耗不同。