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。
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.
该控制器具有补水压力闭环控制和循环水泵定时工作控制功能。
The controller is with the function of closed -loop controlling for supplementing water pressure and time control for circulating water pump.
该控制器具有补水压力闭环控制和循环水泵定时工作控制功能。
The controller is with the function of closed -loop controlling for supplementing water pressure and time control for circulating water pump.
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