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对使用温控阀的双管系统和使用截止阀的单管跨越式系统进行了初投资比较 ,认为前者增加的主要是阀门费用 ;计算了以煤、燃气、油为燃料时的投资回收年限 ,指出当锅炉的燃料为燃气和油时 ,使用温控阀的双管系统才具有经济上的竞争力和吸引力。
The comparison of the initial investment between double pipe system using temperature control valve and single pipe leaping system using globe valve shows that the former mainly increases the valve cost; calculates the investment recovery period when using coal, gas and oil as fuel, Pointed out that when the boiler fuel gas and oil, the use of temperature control valve of the double pipe system is economically competitive and attractive.